0001 Two Sum Go 47.2% Easy 0002 Add Two Numbers Go 36.3% Medium 0003 Longest Substring Without Repeating Characters Go 31.8% Medium 0004 Median of Two Sorted Arrays Go 32.0% Hard 0005 Longest Palindromic Substring Go 30.9% Medium 0006 ZigZag Conversion Go 38.9% Medium 0007 Reverse Integer Go 26.1% Easy 0008 String to Integer (atoi) Go 15.9% Medium 0009 Palindrome Number Go 50.6% Easy 0010 Regular Expression Matching 27.7% Hard 0011 Container With Most Water Go 53.0% Medium 0012 Integer to Roman Go 57.6% Medium 0013 Roman to Integer Go 57.3% Easy 0014 Longest Common Prefix 36.9% Easy 0015 3Sum Go 28.8% Medium 0016 3Sum Closest Go 46.4% Medium 0017 Letter Combinations of a Phone Number Go 50.6% Medium 0018 4Sum Go 35.7% Medium 0019 Remove Nth Node From End of List Go 36.4% Medium 0020 Valid Parentheses Go 40.2% Easy 0021 Merge Two Sorted Lists Go 57.0% Easy 0022 Generate Parentheses Go 66.9% Medium 0023 Merge k Sorted Lists Go 43.8% Hard 0024 Swap Nodes in Pairs Go 54.4% Medium 0025 Reverse Nodes in k-Group Go 46.4% Hard 0026 Remove Duplicates from Sorted Array Go 47.2% Easy 0027 Remove Element Go 49.9% Easy 0028 Implement strStr() Go 35.6% Easy 0029 Divide Two Integers Go 17.0% Medium 0030 Substring with Concatenation of All Words Go 26.7% Hard 0031 Next Permutation Go 34.2% Medium 0032 Longest Valid Parentheses Go 30.2% Hard 0033 Search in Rotated Sorted Array Go 36.5% Medium 0034 Find First and Last Position of Element in Sorted Array Go 38.2% Medium 0035 Search Insert Position Go 42.8% Easy 0036 Valid Sudoku Go 51.5% Medium 0037 Sudoku Solver Go 48.4% Hard 0038 Count and Say 46.8% Medium 0039 Combination Sum Go 60.7% Medium 0040 Combination Sum II Go 51.0% Medium 0041 First Missing Positive Go 34.5% Hard 0042 Trapping Rain Water Go 52.4% Hard 0043 Multiply Strings Go 35.5% Medium 0044 Wildcard Matching 25.8% Hard 0045 Jump Game II Go 33.2% Medium 0046 Permutations Go 68.1% Medium 0047 Permutations II Go 50.6% Medium 0048 Rotate Image Go 62.1% Medium 0049 Group Anagrams Go 60.6% Medium 0050 Pow(x, n) Go 31.3% Medium 0051 N-Queens Go 52.5% Hard 0052 N-Queens II Go 62.8% Hard 0053 Maximum Subarray Go 48.2% Easy 0054 Spiral Matrix Go 37.4% Medium 0055 Jump Game Go 35.6% Medium 0056 Merge Intervals Go 42.0% Medium 0057 Insert Interval Go 35.9% Medium 0058 Length of Last Word 33.6% Easy 0059 Spiral Matrix II Go 59.0% Medium 0060 Permutation Sequence Go 40.1% Hard 0061 Rotate List Go 32.3% Medium 0062 Unique Paths Go 57.0% Medium 0063 Unique Paths II Go 36.1% Medium 0064 Minimum Path Sum Go 57.1% Medium 0065 Valid Number Go 16.8% Hard 0066 Plus One Go 42.1% Easy 0067 Add Binary Go 47.9% Easy 0068 Text Justification 31.2% Hard 0069 Sqrt(x) Go 35.7% Easy 0070 Climbing Stairs Go 49.0% Easy 0071 Simplify Path Go 35.4% Medium 0072 Edit Distance 47.9% Hard 0073 Set Matrix Zeroes Go 45.1% Medium 0074 Search a 2D Matrix Go 38.9% Medium 0075 Sort Colors Go 50.7% Medium 0076 Minimum Window Substring Go 36.7% Hard 0077 Combinations Go 59.0% Medium 0078 Subsets Go 66.7% Medium 0079 Word Search Go 37.8% Medium 0080 Remove Duplicates from Sorted Array II Go 46.9% Medium 0081 Search in Rotated Sorted Array II Go 33.9% Medium 0082 Remove Duplicates from Sorted List II Go 40.0% Medium 0083 Remove Duplicates from Sorted List Go 47.1% Easy 0084 Largest Rectangle in Histogram Go 38.0% Hard 0085 Maximal Rectangle 40.2% Hard 0086 Partition List Go 45.4% Medium 0087 Scramble String 34.9% Hard 0088 Merge Sorted Array Go 41.2% Easy 0089 Gray Code Go 51.2% Medium 0090 Subsets II Go 49.8% Medium 0091 Decode Ways Go 27.5% Medium 0092 Reverse Linked List II Go 41.9% Medium 0093 Restore IP Addresses Go 38.6% Medium 0094 Binary Tree Inorder Traversal Go 67.2% Easy 0095 Unique Binary Search Trees II Go 44.0% Medium 0096 Unique Binary Search Trees Go 55.2% Medium 0097 Interleaving String Go 33.6% Medium 0098 Validate Binary Search Tree Go 29.2% Medium 0099 Recover Binary Search Tree Go 43.5% Medium 0100 Same Tree Go 54.5% Easy 0101 Symmetric Tree Go 49.1% Easy 0102 Binary Tree Level Order Traversal Go 58.0% Medium 0103 Binary Tree Zigzag Level Order Traversal Go 51.1% Medium 0104 Maximum Depth of Binary Tree Go 69.0% Easy 0105 Construct Binary Tree from Preorder and Inorder Traversal Go 53.9% Medium 0106 Construct Binary Tree from Inorder and Postorder Traversal Go 51.1% Medium 0107 Binary Tree Level Order Traversal II Go 56.2% Medium 0108 Convert Sorted Array to Binary Search Tree Go 62.0% Easy 0109 Convert Sorted List to Binary Search Tree Go 52.5% Medium 0110 Balanced Binary Tree Go 45.2% Easy 0111 Minimum Depth of Binary Tree Go 40.4% Easy 0112 Path Sum Go 43.1% Easy 0113 Path Sum II Go 50.4% Medium 0114 Flatten Binary Tree to Linked List Go 54.0% Medium 0115 Distinct Subsequences Go 40.4% Hard 0116 Populating Next Right Pointers in Each Node 50.8% Medium 0117 Populating Next Right Pointers in Each Node II 43.1% Medium 0118 Pascal's Triangle Go 57.4% Easy 0119 Pascal's Triangle II Go 53.2% Easy 0120 Triangle Go 47.4% Medium 0121 Best Time to Buy and Sell Stock Go 52.2% Easy 0122 Best Time to Buy and Sell Stock II Go 59.4% Easy 0123 Best Time to Buy and Sell Stock III 40.7% Hard 0124 Binary Tree Maximum Path Sum Go 36.1% Hard 0125 Valid Palindrome Go 39.1% Easy 0126 Word Ladder II Go 24.3% Hard 0127 Word Ladder Go 32.8% Hard 0128 Longest Consecutive Sequence Go 47.3% Medium 0129 Sum Root to Leaf Numbers Go 52.2% Medium 0130 Surrounded Regions Go 30.5% Medium 0131 Palindrome Partitioning Go 53.8% Medium 0132 Palindrome Partitioning II 31.6% Hard 0133 Clone Graph 41.1% Medium 0134 Gas Station 42.2% Medium 0135 Candy Go 35.1% Hard 0136 Single Number Go 67.1% Easy 0137 Single Number II Go 54.6% Medium 0138 Copy List with Random Pointer Go 42.7% Medium 0139 Word Break 42.4% Medium 0140 Word Break II 36.8% Hard 0141 Linked List Cycle Go 43.5% Easy 0142 Linked List Cycle II Go 40.7% Medium 0143 Reorder List Go 42.1% Medium 0144 Binary Tree Preorder Traversal Go 58.7% Easy 0145 Binary Tree Postorder Traversal Go 59.2% Easy 0146 LRU Cache Go 37.1% Medium 0147 Insertion Sort List Go 45.2% Medium 0148 Sort List Go 47.5% Medium 0149 Max Points on a Line 18.3% Hard 0150 Evaluate Reverse Polish Notation Go 39.7% Medium 0151 Reverse Words in a String Go 24.9% Medium 0152 Maximum Product Subarray Go 33.1% Medium 0153 Find Minimum in Rotated Sorted Array Go 46.7% Medium 0154 Find Minimum in Rotated Sorted Array II Go 42.3% Hard 0155 Min Stack Go 47.4% Easy 0156 Binary Tree Upside Down 57.2% Medium 0157 Read N Characters Given Read4 38.4% Easy 0158 Read N Characters Given Read4 II - Call multiple times 38.3% Hard 0159 Longest Substring with At Most Two Distinct Characters 51.1% Medium 0160 Intersection of Two Linked Lists Go 45.7% Easy 0161 One Edit Distance 33.4% Medium 0162 Find Peak Element Go 44.3% Medium 0163 Missing Ranges 28.3% Easy 0164 Maximum Gap Go 39.7% Hard 0165 Compare Version Numbers 31.1% Medium 0166 Fraction to Recurring Decimal 22.6% Medium 0167 Two Sum II - Input array is sorted Go 56.2% Easy 0168 Excel Sheet Column Title Go 32.3% Easy 0169 Majority Element Go 60.7% Easy 0170 Two Sum III - Data structure design 35.3% Easy 0171 Excel Sheet Column Number Go 57.7% Easy 0172 Factorial Trailing Zeroes Go 39.2% Easy 0173 Binary Search Tree Iterator Go 61.6% Medium 0174 Dungeon Game Go 33.8% Hard 0175 Combine Two Tables 65.8% Easy 0176 Second Highest Salary 34.0% Easy 0177 Nth Highest Salary 34.1% Medium 0178 Rank Scores 52.5% Medium 0179 Largest Number Go 31.3% Medium 0180 Consecutive Numbers 43.3% Medium 0181 Employees Earning More Than Their Managers 62.2% Easy 0182 Duplicate Emails 65.9% Easy 0183 Customers Who Never Order 58.6% Easy 0184 Department Highest Salary 42.1% Medium 0185 Department Top Three Salaries 41.4% Hard 0186 Reverse Words in a String II 46.9% Medium 0187 Repeated DNA Sequences Go 42.1% Medium 0188 Best Time to Buy and Sell Stock IV 30.7% Hard 0189 Rotate Array Go 36.9% Medium 0190 Reverse Bits Go 43.6% Easy 0191 Number of 1 Bits Go 55.3% Easy 0192 Word Frequency 25.5% Medium 0193 Valid Phone Numbers 25.4% Easy 0194 Transpose File 24.5% Medium 0195 Tenth Line 32.7% Easy 0196 Delete Duplicate Emails 47.3% Easy 0197 Rising Temperature 40.7% Easy 0198 House Robber Go 43.7% Medium 0199 Binary Tree Right Side View Go 57.1% Medium 0200 Number of Islands Go 50.4% Medium 0201 Bitwise AND of Numbers Range Go 39.8% Medium 0202 Happy Number Go 51.7% Easy 0203 Remove Linked List Elements Go 40.1% Easy 0204 Count Primes Go 32.8% Easy 0205 Isomorphic Strings Go 40.9% Easy 0206 Reverse Linked List Go 66.6% Easy 0207 Course Schedule Go 44.4% Medium 0208 Implement Trie (Prefix Tree) Go 53.6% Medium 0209 Minimum Size Subarray Sum Go 40.4% Medium 0210 Course Schedule II Go 43.7% Medium 0211 Design Add and Search Words Data Structure Go 41.4% Medium 0212 Word Search II Go 37.8% Hard 0213 House Robber II Go 37.9% Medium 0214 Shortest Palindrome 31.0% Hard 0215 Kth Largest Element in an Array Go 59.8% Medium 0216 Combination Sum III Go 61.4% Medium 0217 Contains Duplicate Go 57.6% Easy 0218 The Skyline Problem Go 37.1% Hard 0219 Contains Duplicate II Go 39.4% Easy 0220 Contains Duplicate III Go 21.4% Medium 0221 Maximal Square 40.3% Medium 0222 Count Complete Tree Nodes Go 50.7% Medium 0223 Rectangle Area Go 38.7% Medium 0224 Basic Calculator Go 38.6% Hard 0225 Implement Stack using Queues Go 48.7% Easy 0226 Invert Binary Tree Go 68.1% Easy 0227 Basic Calculator II Go 39.2% Medium 0228 Summary Ranges Go 43.3% Easy 0229 Majority Element II Go 39.6% Medium 0230 Kth Smallest Element in a BST Go 63.8% Medium 0231 Power of Two Go 43.8% Easy 0232 Implement Queue using Stacks Go 53.5% Easy 0233 Number of Digit One 32.0% Hard 0234 Palindrome Linked List Go 43.1% Easy 0235 Lowest Common Ancestor of a Binary Search Tree Go 52.9% Easy 0236 Lowest Common Ancestor of a Binary Tree Go 50.5% Medium 0237 Delete Node in a Linked List Go 68.6% Easy 0238 Product of Array Except Self 61.7% Medium 0239 Sliding Window Maximum Go 45.1% Hard 0240 Search a 2D Matrix II Go 45.9% Medium 0241 Different Ways to Add Parentheses 58.2% Medium 0242 Valid Anagram Go 59.4% Easy 0243 Shortest Word Distance 62.7% Easy 0244 Shortest Word Distance II 55.7% Medium 0245 Shortest Word Distance III 56.4% Medium 0246 Strobogrammatic Number 46.8% Easy 0247 Strobogrammatic Number II 49.3% Medium 0248 Strobogrammatic Number III 40.6% Hard 0249 Group Shifted Strings 59.2% Medium 0250 Count Univalue Subtrees 53.7% Medium 0251 Flatten 2D Vector 46.7% Medium 0252 Meeting Rooms 55.8% Easy 0253 Meeting Rooms II 47.6% Medium 0254 Factor Combinations 47.9% Medium 0255 Verify Preorder Sequence in Binary Search Tree 46.7% Medium 0256 Paint House 55.2% Medium 0257 Binary Tree Paths Go 55.1% Easy 0258 Add Digits Go 59.1% Easy 0259 3Sum Smaller 49.5% Medium 0260 Single Number III Go 65.6% Medium 0261 Graph Valid Tree 43.8% Medium 0262 Trips and Users 36.3% Hard 0263 Ugly Number Go 41.7% Easy 0264 Ugly Number II Go 43.3% Medium 0265 Paint House II 46.7% Hard 0266 Palindrome Permutation 63.3% Easy 0267 Palindrome Permutation II 38.1% Medium 0268 Missing Number Go 56.2% Easy 0269 Alien Dictionary 34.0% Hard 0270 Closest Binary Search Tree Value 51.1% Easy 0271 Encode and Decode Strings 33.9% Medium 0272 Closest Binary Search Tree Value II 53.5% Hard 0273 Integer to English Words 28.6% Hard 0274 H-Index Go 36.6% Medium 0275 H-Index II Go 36.5% Medium 0276 Paint Fence 39.6% Medium 0277 Find the Celebrity 44.6% Medium 0278 First Bad Version Go 38.4% Easy 0279 Perfect Squares Go 49.8% Medium 0280 Wiggle Sort 65.1% Medium 0281 Zigzag Iterator 60.0% Medium 0282 Expression Add Operators 37.3% Hard 0283 Move Zeroes Go 58.9% Easy 0284 Peeking Iterator Go 51.5% Medium 0285 Inorder Successor in BST 44.4% Medium 0286 Walls and Gates 57.3% Medium 0287 Find the Duplicate Number Go 58.1% Medium 0288 Unique Word Abbreviation 23.6% Medium 0289 Game of Life 59.8% Medium 0290 Word Pattern Go 38.6% Easy 0291 Word Pattern II 44.8% Medium 0292 Nim Game 55.2% Easy 0293 Flip Game 61.7% Easy 0294 Flip Game II 51.0% Medium 0295 Find Median from Data Stream 48.3% Hard 0296 Best Meeting Point 58.4% Hard 0297 Serialize and Deserialize Binary Tree Go 51.0% Hard 0298 Binary Tree Longest Consecutive Sequence 48.7% Medium 0299 Bulls and Cows 45.2% Medium 0300 Longest Increasing Subsequence Go 45.4% Medium 0301 Remove Invalid Parentheses 45.3% Hard 0302 Smallest Rectangle Enclosing Black Pixels 53.0% Hard 0303 Range Sum Query - Immutable Go 49.5% Easy 0304 Range Sum Query 2D - Immutable Go 43.9% Medium 0305 Number of Islands II 39.4% Hard 0306 Additive Number Go 29.9% Medium 0307 Range Sum Query - Mutable Go 37.7% Medium 0308 Range Sum Query 2D - Mutable 39.0% Hard 0309 Best Time to Buy and Sell Stock with Cooldown Go 48.9% Medium 0310 Minimum Height Trees 35.2% Medium 0311 Sparse Matrix Multiplication 64.5% Medium 0312 Burst Balloons 54.2% Hard 0313 Super Ugly Number 46.8% Medium 0314 Binary Tree Vertical Order Traversal 47.8% Medium 0315 Count of Smaller Numbers After Self Go 42.0% Hard 0316 Remove Duplicate Letters 39.8% Medium 0317 Shortest Distance from All Buildings 43.4% Hard 0318 Maximum Product of Word Lengths Go 55.4% Medium 0319 Bulb Switcher 45.8% Medium 0320 Generalized Abbreviation 54.4% Medium 0321 Create Maximum Number 27.8% Hard 0322 Coin Change Go 38.2% Medium 0323 Number of Connected Components in an Undirected Graph 58.8% Medium 0324 Wiggle Sort II Go 31.1% Medium 0325 Maximum Size Subarray Sum Equals k 47.9% Medium 0326 Power of Three Go 42.5% Easy 0327 Count of Range Sum Go 36.3% Hard 0328 Odd Even Linked List Go 57.7% Medium 0329 Longest Increasing Path in a Matrix Go 47.1% Hard 0330 Patching Array 35.3% Hard 0331 Verify Preorder Serialization of a Binary Tree Go 41.3% Medium 0332 Reconstruct Itinerary 38.7% Medium 0333 Largest BST Subtree 38.9% Medium 0334 Increasing Triplet Subsequence 41.0% Medium 0335 Self Crossing 28.8% Hard 0336 Palindrome Pairs 36.0% Hard 0337 House Robber III Go 52.1% Medium 0338 Counting Bits Go 71.1% Easy 0339 Nested List Weight Sum 77.4% Medium 0340 Longest Substring with At Most K Distinct Characters 46.1% Medium 0341 Flatten Nested List Iterator Go 56.5% Medium 0342 Power of Four Go 42.1% Easy 0343 Integer Break Go 51.6% Medium 0344 Reverse String Go 71.3% Easy 0345 Reverse Vowels of a String Go 45.6% Easy 0346 Moving Average from Data Stream 74.2% Easy 0347 Top K Frequent Elements Go 63.0% Medium 0348 Design Tic-Tac-Toe 56.3% Medium 0349 Intersection of Two Arrays Go 66.2% Easy 0350 Intersection of Two Arrays II Go 52.6% Easy 0351 Android Unlock Patterns 50.0% Medium 0352 Data Stream as Disjoint Intervals 49.1% Hard 0353 Design Snake Game 36.7% Medium 0354 Russian Doll Envelopes Go 38.4% Hard 0355 Design Twitter 32.3% Medium 0356 Line Reflection 33.4% Medium 0357 Count Numbers with Unique Digits Go 49.3% Medium 0358 Rearrange String k Distance Apart 36.0% Hard 0359 Logger Rate Limiter 73.2% Easy 0360 Sort Transformed Array 50.5% Medium 0361 Bomb Enemy 47.6% Medium 0362 Design Hit Counter 66.0% Medium 0363 Max Sum of Rectangle No Larger Than K 38.8% Hard 0364 Nested List Weight Sum II 64.8% Medium 0365 Water and Jug Problem 31.9% Medium 0366 Find Leaves of Binary Tree 72.8% Medium 0367 Valid Perfect Square Go 42.4% Easy 0368 Largest Divisible Subset Go 38.6% Medium 0369 Plus One Linked List 59.7% Medium 0370 Range Addition 64.0% Medium 0371 Sum of Two Integers Go 50.6% Medium 0372 Super Pow Go 36.9% Medium 0373 Find K Pairs with Smallest Sums Go 38.7% Medium 0374 Guess Number Higher or Lower Go 45.7% Easy 0375 Guess Number Higher or Lower II 43.1% Medium 0376 Wiggle Subsequence Go 42.6% Medium 0377 Combination Sum IV Go 47.3% Medium 0378 Kth Smallest Element in a Sorted Matrix Go 57.1% Medium 0379 Design Phone Directory 49.1% Medium 0380 Insert Delete GetRandom O(1) 49.5% Medium 0381 Insert Delete GetRandom O(1) - Duplicates allowed 35.2% Hard 0382 Linked List Random Node 54.6% Medium 0383 Ransom Note 53.7% Easy 0384 Shuffle an Array 54.4% Medium 0385 Mini Parser Go 34.9% Medium 0386 Lexicographical Numbers Go 55.4% Medium 0387 First Unique Character in a String Go 54.5% Easy 0388 Longest Absolute File Path 43.7% Medium 0389 Find the Difference Go 58.3% Easy 0390 Elimination Game 45.6% Medium 0391 Perfect Rectangle 31.4% Hard 0392 Is Subsequence Go 49.8% Easy 0393 UTF-8 Validation Go 38.4% Medium 0394 Decode String Go 53.6% Medium 0395 Longest Substring with At Least K Repeating Characters Go 43.9% Medium 0396 Rotate Function 37.0% Medium 0397 Integer Replacement Go 33.7% Medium 0398 Random Pick Index 59.4% Medium 0399 Evaluate Division Go 55.1% Medium 0400 Nth Digit 32.6% Medium 0401 Binary Watch Go 49.0% Easy 0402 Remove K Digits Go 28.8% Medium 0403 Frog Jump 42.0% Hard 0404 Sum of Left Leaves Go 52.6% Easy 0405 Convert a Number to Hexadecimal Go 44.8% Easy 0406 Queue Reconstruction by Height 69.0% Medium 0407 Trapping Rain Water II 45.0% Hard 0408 Valid Word Abbreviation 31.7% Easy 0409 Longest Palindrome Go 52.4% Easy 0410 Split Array Largest Sum Go 47.3% Hard 0411 Minimum Unique Word Abbreviation 37.5% Hard 0412 Fizz Buzz Go 64.4% Easy 0413 Arithmetic Slices Go 60.2% Medium 0414 Third Maximum Number Go 30.8% Easy 0415 Add Strings 49.2% Easy 0416 Partition Equal Subset Sum Go 45.2% Medium 0417 Pacific Atlantic Water Flow Go 45.0% Medium 0418 Sentence Screen Fitting 34.1% Medium 0419 Battleships in a Board 71.7% Medium 0420 Strong Password Checker 13.6% Hard 0421 Maximum XOR of Two Numbers in an Array Go 54.7% Medium 0422 Valid Word Square 38.3% Easy 0423 Reconstruct Original Digits from English Go 51.2% Medium 0424 Longest Repeating Character Replacement Go 48.9% Medium 0425 Word Squares 50.7% Hard 0426 Convert Binary Search Tree to Sorted Doubly Linked List 62.2% Medium 0427 Construct Quad Tree 63.4% Medium 0428 Serialize and Deserialize N-ary Tree 62.4% Hard 0429 N-ary Tree Level Order Traversal 67.3% Medium 0430 Flatten a Multilevel Doubly Linked List 57.2% Medium 0431 Encode N-ary Tree to Binary Tree 75.3% Hard 0432 All O`one Data Structure 33.7% Hard 0433 Minimum Genetic Mutation Go 44.0% Medium 0434 Number of Segments in a String 37.7% Easy 0435 Non-overlapping Intervals Go 44.7% Medium 0436 Find Right Interval Go 48.7% Medium 0437 Path Sum III Go 48.6% Medium 0438 Find All Anagrams in a String Go 45.7% Medium 0439 Ternary Expression Parser 57.1% Medium 0440 K-th Smallest in Lexicographical Order 30.0% Hard 0441 Arranging Coins Go 42.9% Easy 0442 Find All Duplicates in an Array 69.7% Medium 0443 String Compression 45.0% Medium 0444 Sequence Reconstruction 23.8% Medium 0445 Add Two Numbers II Go 57.0% Medium 0446 Arithmetic Slices II - Subsequence 34.1% Hard 0447 Number of Boomerangs Go 52.7% Medium 0448 Find All Numbers Disappeared in an Array Go 56.6% Easy 0449 Serialize and Deserialize BST 54.8% Medium 0450 Delete Node in a BST 46.0% Medium 0451 Sort Characters By Frequency Go 65.1% Medium 0452 Minimum Number of Arrows to Burst Balloons 50.1% Medium 0453 Minimum Moves to Equal Array Elements Go 51.6% Easy 0454 4Sum II Go 55.0% Medium 0455 Assign Cookies Go 50.4% Easy 0456 132 Pattern Go 30.7% Medium 0457 Circular Array Loop Go 30.6% Medium 0458 Poor Pigs 54.7% Hard 0459 Repeated Substring Pattern 43.4% Easy 0460 LFU Cache Go 37.2% Hard 0461 Hamming Distance Go 73.4% Easy 0462 Minimum Moves to Equal Array Elements II Go 55.6% Medium 0463 Island Perimeter Go 67.2% Easy 0464 Can I Win 29.7% Medium 0465 Optimal Account Balancing 48.7% Hard 0466 Count The Repetitions 28.7% Hard 0467 Unique Substrings in Wraparound String 36.5% Medium 0468 Validate IP Address 25.4% Medium 0469 Convex Polygon 37.7% Medium 0470 Implement Rand10() Using Rand7() Go 46.2% Medium 0471 Encode String with Shortest Length 50.0% Hard 0472 Concatenated Words 44.1% Hard 0473 Matchsticks to Square Go 39.9% Medium 0474 Ones and Zeroes Go 43.5% Medium 0475 Heaters Go 34.0% Medium 0476 Number Complement Go 65.3% Easy 0477 Total Hamming Distance Go 50.9% Medium 0478 Generate Random Point in a Circle Go 39.1% Medium 0479 Largest Palindrome Product 30.0% Hard 0480 Sliding Window Median Go 39.6% Hard 0481 Magical String 48.4% Medium 0482 License Key Formatting 43.1% Easy 0483 Smallest Good Base Go 36.7% Hard 0484 Find Permutation 64.3% Medium 0485 Max Consecutive Ones Go 53.1% Easy 0486 Predict the Winner 49.3% Medium 0487 Max Consecutive Ones II 48.0% Medium 0488 Zuma Game 38.2% Hard 0489 Robot Room Cleaner 73.6% Hard 0490 The Maze 53.4% Medium 0491 Increasing Subsequences Go 48.4% Medium 0492 Construct the Rectangle 51.0% Easy 0493 Reverse Pairs Go 27.8% Hard 0494 Target Sum Go 45.6% Medium 0495 Teemo Attacking 56.2% Easy 0496 Next Greater Element I Go 66.5% Easy 0497 Random Point in Non-overlapping Rectangles Go 39.1% Medium 0498 Diagonal Traverse Go 51.4% Medium 0499 The Maze III 43.0% Hard 0500 Keyboard Row Go 66.3% Easy 0501 Find Mode in Binary Search Tree 44.5% Easy 0502 IPO 42.3% Hard 0503 Next Greater Element II Go 59.4% Medium 0504 Base 7 46.7% Easy 0505 The Maze II 49.6% Medium 0506 Relative Ranks 52.1% Easy 0507 Perfect Number Go 36.7% Easy 0508 Most Frequent Subtree Sum Go 60.0% Medium 0509 Fibonacci Number Go 67.8% Easy 0510 Inorder Successor in BST II 60.9% Medium 0511 Game Play Analysis I 81.7% Easy 0512 Game Play Analysis II 56.2% Easy 0513 Find Bottom Left Tree Value Go 63.3% Medium 0514 Freedom Trail 45.2% Hard 0515 Find Largest Value in Each Tree Row Go 62.9% Medium 0516 Longest Palindromic Subsequence 56.6% Medium 0517 Super Washing Machines 38.8% Hard 0518 Coin Change 2 Go 53.1% Medium 0519 Random Flip Matrix 38.0% Medium 0520 Detect Capital 54.2% Easy 0521 Longest Uncommon Subsequence I 59.2% Easy 0522 Longest Uncommon Subsequence II 34.4% Medium 0523 Continuous Subarray Sum Go 25.3% Medium 0524 Longest Word in Dictionary through Deleting Go 50.3% Medium 0525 Contiguous Array Go 43.9% Medium 0526 Beautiful Arrangement Go 62.4% Medium 0527 Word Abbreviation 56.9% Hard 0528 Random Pick with Weight Go 45.0% Medium 0529 Minesweeper Go 62.2% Medium 0530 Minimum Absolute Difference in BST Go 55.3% Easy 0531 Lonely Pixel I 60.0% Medium 0532 K-diff Pairs in an Array Go 36.0% Medium 0533 Lonely Pixel II 48.2% Medium 0534 Game Play Analysis III 80.5% Medium 0535 Encode and Decode TinyURL Go 82.7% Medium 0536 Construct Binary Tree from String 52.9% Medium 0537 Complex Number Multiplication Go 68.5% Medium 0538 Convert BST to Greater Tree Go 60.6% Medium 0539 Minimum Time Difference 52.6% Medium 0540 Single Element in a Sorted Array 58.0% Medium 0541 Reverse String II Go 49.7% Easy 0542 01 Matrix Go 41.6% Medium 0543 Diameter of Binary Tree 50.4% Easy 0544 Output Contest Matches 76.1% Medium 0545 Boundary of Binary Tree 41.1% Medium 0546 Remove Boxes 44.1% Hard 0547 Number of Provinces Go 61.3% Medium 0548 Split Array with Equal Sum 49.0% Medium 0549 Binary Tree Longest Consecutive Sequence II 47.5% Medium 0550 Game Play Analysis IV 45.4% Medium 0551 Student Attendance Record I 46.4% Easy 0552 Student Attendance Record II 38.2% Hard 0553 Optimal Division 57.8% Medium 0554 Brick Wall Go 51.8% Medium 0555 Split Concatenated Strings 43.0% Medium 0556 Next Greater Element III 33.4% Medium 0557 Reverse Words in a String III Go 73.1% Easy 0558 Logical OR of Two Binary Grids Represented as Quad-Trees 46.0% Medium 0559 Maximum Depth of N-ary Tree 69.9% Easy 0560 Subarray Sum Equals K 43.7% Medium 0561 Array Partition I Go 74.0% Easy 0562 Longest Line of Consecutive One in Matrix 47.1% Medium 0563 Binary Tree Tilt Go 54.0% Easy 0564 Find the Closest Palindrome 20.5% Hard 0565 Array Nesting 56.2% Medium 0566 Reshape the Matrix Go 61.1% Easy 0567 Permutation in String Go 44.6% Medium 0568 Maximum Vacation Days 42.0% Hard 0569 Median Employee Salary 63.3% Hard 0570 Managers with at Least 5 Direct Reports 67.1% Medium 0571 Find Median Given Frequency of Numbers 45.6% Hard 0572 Subtree of Another Tree Go 44.7% Easy 0573 Squirrel Simulation 54.3% Medium 0574 Winning Candidate 53.9% Medium 0575 Distribute Candies Go 64.6% Easy 0576 Out of Boundary Paths Go 39.5% Medium 0577 Employee Bonus 72.7% Easy 0578 Get Highest Answer Rate Question 42.6% Medium 0579 Find Cumulative Salary of an Employee 38.7% Hard 0580 Count Student Number in Departments 53.0% Medium 0581 Shortest Unsorted Continuous Subarray Go 33.2% Medium 0582 Kill Process 64.4% Medium 0583 Delete Operation for Two Strings Go 52.2% Medium 0584 Find Customer Referee 74.6% Easy 0585 Investments in 2016 57.7% Medium 0586 Customer Placing the Largest Number of Orders 75.7% Easy 0587 Erect the Fence 36.7% Hard 0588 Design In-Memory File System 46.9% Hard 0589 N-ary Tree Preorder Traversal Go 74.7% Easy 0590 N-ary Tree Postorder Traversal 74.4% Easy 0591 Tag Validator 35.3% Hard 0592 Fraction Addition and Subtraction 50.7% Medium 0593 Valid Square 43.3% Medium 0594 Longest Harmonious Subsequence Go 51.5% Easy 0595 Big Countries 79.0% Easy 0596 Classes More Than 5 Students 39.1% Easy 0597 Friend Requests I: Overall Acceptance Rate 42.2% Easy 0598 Range Addition II Go 50.5% Easy 0599 Minimum Index Sum of Two Lists Go 52.3% Easy 0600 Non-negative Integers without Consecutive Ones 34.6% Hard 0601 Human Traffic of Stadium 46.7% Hard 0602 Friend Requests II: Who Has the Most Friends 58.7% Medium 0603 Consecutive Available Seats 66.7% Easy 0604 Design Compressed String Iterator 38.5% Easy 0605 Can Place Flowers Go 31.6% Easy 0606 Construct String from Binary Tree 56.2% Easy 0607 Sales Person 66.1% Easy 0608 Tree Node 70.5% Medium 0609 Find Duplicate File in System Go 63.1% Medium 0610 Triangle Judgement 69.6% Easy 0611 Valid Triangle Number 49.7% Medium 0612 Shortest Distance in a Plane 62.1% Medium 0613 Shortest Distance in a Line 80.2% Easy 0614 Second Degree Follower 33.3% Medium 0615 Average Salary: Departments VS Company 54.0% Hard 0616 Add Bold Tag in String 45.3% Medium 0617 Merge Two Binary Trees Go 76.0% Easy 0618 Students Report By Geography 61.5% Hard 0619 Biggest Single Number 45.8% Easy 0620 Not Boring Movies 70.9% Easy 0621 Task Scheduler 52.8% Medium 0622 Design Circular Queue Go 47.9% Medium 0623 Add One Row to Tree Go 53.2% Medium 0624 Maximum Distance in Arrays 39.8% Medium 0625 Minimum Factorization 33.1% Medium 0626 Exchange Seats 67.1% Medium 0627 Swap Salary 78.8% Easy 0628 Maximum Product of Three Numbers Go 46.7% Easy 0629 K Inverse Pairs Array 36.9% Hard 0630 Course Schedule III Go 34.9% Hard 0631 Design Excel Sum Formula 33.5% Hard 0632 Smallest Range Covering Elements from K Lists Go 55.3% Hard 0633 Sum of Square Numbers Go 32.9% Medium 0634 Find the Derangement of An Array 40.6% Medium 0635 Design Log Storage System 60.6% Medium 0636 Exclusive Time of Functions Go 56.1% Medium 0637 Average of Levels in Binary Tree Go 66.6% Easy 0638 Shopping Offers Go 53.7% Medium 0639 Decode Ways II 27.7% Hard 0640 Solve the Equation 42.9% Medium 0641 Design Circular Deque 56.5% Medium 0642 Design Search Autocomplete System 47.0% Hard 0643 Maximum Average Subarray I Go 42.3% Easy 0644 Maximum Average Subarray II 34.5% Hard 0645 Set Mismatch Go 40.9% Easy 0646 Maximum Length of Pair Chain 53.8% Medium 0647 Palindromic Substrings Go 63.0% Medium 0648 Replace Words Go 59.8% Medium 0649 Dota2 Senate 39.5% Medium 0650 2 Keys Keyboard 50.8% Medium 0651 4 Keys Keyboard 53.3% Medium 0652 Find Duplicate Subtrees 53.8% Medium 0653 Two Sum IV - Input is a BST Go 56.6% Easy 0654 Maximum Binary Tree 81.9% Medium 0655 Print Binary Tree 56.9% Medium 0656 Coin Path 30.0% Hard 0657 Robot Return to Origin 74.3% Easy 0658 Find K Closest Elements Go 42.8% Medium 0659 Split Array into Consecutive Subsequences 44.7% Medium 0660 Remove 9 54.5% Hard 0661 Image Smoother Go 52.6% Easy 0662 Maximum Width of Binary Tree Go 39.6% Medium 0663 Equal Tree Partition 39.9% Medium 0664 Strange Printer 42.4% Hard 0665 Non-decreasing Array Go 20.9% Medium 0666 Path Sum IV 57.4% Medium 0667 Beautiful Arrangement II Go 59.0% Medium 0668 Kth Smallest Number in Multiplication Table Go 48.3% Hard 0669 Trim a Binary Search Tree Go 64.4% Medium 0670 Maximum Swap 45.5% Medium 0671 Second Minimum Node In a Binary Tree 42.9% Easy 0672 Bulb Switcher II 51.0% Medium 0673 Number of Longest Increasing Subsequence 38.9% Medium 0674 Longest Continuous Increasing Subsequence Go 46.5% Easy 0675 Cut Off Trees for Golf Event 35.5% Hard 0676 Implement Magic Dictionary Go 55.6% Medium 0677 Map Sum Pairs 54.3% Medium 0678 Valid Parenthesis String 32.0% Medium 0679 24 Game 47.6% Hard 0680 Valid Palindrome II 37.3% Easy 0681 Next Closest Time 46.1% Medium 0682 Baseball Game Go 68.0% Easy 0683 K Empty Slots 36.3% Hard 0684 Redundant Connection Go 59.8% Medium 0685 Redundant Connection II Go 33.2% Hard 0686 Repeated String Match 33.0% Medium 0687 Longest Univalue Path 38.0% Medium 0688 Knight Probability in Chessboard 50.7% Medium 0689 Maximum Sum of 3 Non-Overlapping Subarrays 47.6% Hard 0690 Employee Importance Go 59.9% Easy 0691 Stickers to Spell Word 45.8% Hard 0692 Top K Frequent Words Go 53.5% Medium 0693 Binary Number with Alternating Bits Go 60.2% Easy 0694 Number of Distinct Islands 58.5% Medium 0695 Max Area of Island Go 66.7% Medium 0696 Count Binary Substrings Go 61.5% Easy 0697 Degree of an Array Go 54.8% Easy 0698 Partition to K Equal Sum Subsets 45.0% Medium 0699 Falling Squares Go 43.5% Hard 0700 Search in a Binary Search Tree 73.7% Easy 0701 Insert into a Binary Search Tree 75.1% Medium 0702 Search in a Sorted Array of Unknown Size 69.4% Medium 0703 Kth Largest Element in a Stream Go 51.4% Easy 0704 Binary Search Go 54.7% Easy 0705 Design HashSet Go 63.9% Easy 0706 Design HashMap Go 63.9% Easy 0707 Design Linked List Go 26.3% Medium 0708 Insert into a Sorted Circular Linked List 32.9% Medium 0709 To Lower Case Go 80.6% Easy 0710 Random Pick with Blacklist Go 33.2% Hard 0711 Number of Distinct Islands II 50.1% Hard 0712 Minimum ASCII Delete Sum for Two Strings 60.0% Medium 0713 Subarray Product Less Than K Go 40.8% Medium 0714 Best Time to Buy and Sell Stock with Transaction Fee Go 58.6% Medium 0715 Range Module Go 41.7% Hard 0716 Max Stack 43.6% Easy 0717 1-bit and 2-bit Characters Go 46.3% Easy 0718 Maximum Length of Repeated Subarray Go 51.0% Medium 0719 Find K-th Smallest Pair Distance Go 32.9% Hard 0720 Longest Word in Dictionary Go 49.7% Medium 0721 Accounts Merge Go 53.1% Medium 0722 Remove Comments 36.7% Medium 0723 Candy Crush 73.5% Medium 0724 Find Pivot Index Go 47.3% Easy 0725 Split Linked List in Parts Go 53.5% Medium 0726 Number of Atoms Go 51.1% Hard 0727 Minimum Window Subsequence 42.7% Hard 0728 Self Dividing Numbers 76.1% Easy 0729 My Calendar I Go 54.1% Medium 0730 Count Different Palindromic Subsequences 43.5% Hard 0731 My Calendar II 51.6% Medium 0732 My Calendar III Go 63.6% Hard 0733 Flood Fill Go 56.1% Easy 0734 Sentence Similarity 42.6% Easy 0735 Asteroid Collision Go 43.5% Medium 0736 Parse Lisp Expression 50.0% Hard 0737 Sentence Similarity II 46.9% Medium 0738 Monotone Increasing Digits 45.9% Medium 0739 Daily Temperatures Go 65.3% Medium 0740 Delete and Earn 51.4% Medium 0741 Cherry Pickup 35.5% Hard 0742 Closest Leaf in a Binary Tree 44.7% Medium 0743 Network Delay Time 46.1% Medium 0744 Find Smallest Letter Greater Than Target Go 45.7% Easy 0745 Prefix and Suffix Search Go 35.2% Hard 0746 Min Cost Climbing Stairs Go 53.6% Easy 0747 Largest Number At Least Twice of Others 43.6% Easy 0748 Shortest Completing Word Go 57.9% Easy 0749 Contain Virus 49.0% Hard 0750 Number Of Corner Rectangles 67.3% Medium 0751 IP to CIDR 58.1% Medium 0752 Open the Lock Go 54.7% Medium 0753 Cracking the Safe Go 52.9% Hard 0754 Reach a Number 40.7% Medium 0755 Pour Water 44.5% Medium 0756 Pyramid Transition Matrix Go 55.9% Medium 0757 Set Intersection Size At Least Two 42.7% Hard 0758 Bold Words in String 48.4% Medium 0759 Employee Free Time 69.1% Hard 0760 Find Anagram Mappings 82.1% Easy 0761 Special Binary String 59.1% Hard 0762 Prime Number of Set Bits in Binary Representation Go 65.0% Easy 0763 Partition Labels Go 78.2% Medium 0764 Largest Plus Sign 47.0% Medium 0765 Couples Holding Hands Go 55.8% Hard 0766 Toeplitz Matrix Go 66.0% Easy 0767 Reorganize String Go 50.7% Medium 0768 Max Chunks To Make Sorted II 50.3% Hard 0769 Max Chunks To Make Sorted 56.2% Medium 0770 Basic Calculator IV 54.4% Hard 0771 Jewels and Stones Go 87.2% Easy 0772 Basic Calculator III 45.0% Hard 0773 Sliding Puzzle 61.7% Hard 0774 Minimize Max Distance to Gas Station 49.0% Hard 0775 Global and Local Inversions Go 46.0% Medium 0776 Split BST 57.0% Medium 0777 Swap Adjacent in LR String 35.7% Medium 0778 Swim in Rising Water Go 57.6% Hard 0779 K-th Symbol in Grammar 39.1% Medium 0780 Reaching Points 30.5% Hard 0781 Rabbits in Forest Go 56.2% Medium 0782 Transform to Chessboard 47.1% Hard 0783 Minimum Distance Between BST Nodes Go 54.6% Easy 0784 Letter Case Permutation Go 69.2% Medium 0785 Is Graph Bipartite? Go 49.1% Medium 0786 K-th Smallest Prime Fraction Go 44.9% Hard 0787 Cheapest Flights Within K Stops 38.5% Medium 0788 Rotated Digits 57.4% Easy 0789 Escape The Ghosts 58.9% Medium 0790 Domino and Tromino Tiling 40.8% Medium 0791 Custom Sort String 66.0% Medium 0792 Number of Matching Subsequences Go 48.9% Medium 0793 Preimage Size of Factorial Zeroes Function Go 40.6% Hard 0794 Valid Tic-Tac-Toe State 34.4% Medium 0795 Number of Subarrays with Bounded Maximum Go 51.7% Medium 0796 Rotate String 48.9% Easy 0797 All Paths From Source to Target 78.8% Medium 0798 Smallest Rotation with Highest Score 46.0% Hard 0799 Champagne Tower 44.2% Medium 0800 Similar RGB Color 62.8% Easy 0801 Minimum Swaps To Make Sequences Increasing 38.7% Medium 0802 Find Eventual Safe States Go 50.5% Medium 0803 Bricks Falling When Hit Go 32.2% Hard 0804 Unique Morse Code Words 79.2% Easy 0805 Split Array With Same Average 26.9% Hard 0806 Number of Lines To Write String 65.7% Easy 0807 Max Increase to Keep City Skyline 84.7% Medium 0808 Soup Servings 41.5% Medium 0809 Expressive Words 46.1% Medium 0810 Chalkboard XOR Game Go 51.0% Hard 0811 Subdomain Visit Count Go 72.2% Easy 0812 Largest Triangle Area Go 59.2% Easy 0813 Largest Sum of Averages 51.5% Medium 0814 Binary Tree Pruning 71.6% Medium 0815 Bus Routes Go 43.9% Hard 0816 Ambiguous Coordinates Go 55.6% Medium 0817 Linked List Components Go 57.8% Medium 0818 Race Car 40.8% Hard 0819 Most Common Word Go 45.4% Easy 0820 Short Encoding of Words Go 54.9% Medium 0821 Shortest Distance to a Character Go 70.3% Easy 0822 Card Flipping Game 43.9% Medium 0823 Binary Trees With Factors Go 43.6% Medium 0824 Goat Latin 67.1% Easy 0825 Friends Of Appropriate Ages 44.5% Medium 0826 Most Profit Assigning Work Go 39.6% Medium 0827 Making A Large Island 46.7% Hard 0828 Count Unique Characters of All Substrings of a Given String Go 46.7% Hard 0829 Consecutive Numbers Sum 39.4% Hard 0830 Positions of Large Groups Go 50.7% Easy 0831 Masking Personal Information 44.9% Medium 0832 Flipping an Image Go 78.6% Easy 0833 Find And Replace in String 51.8% Medium 0834 Sum of Distances in Tree Go 47.4% Hard 0835 Image Overlap 61.4% Medium 0836 Rectangle Overlap Go 42.7% Easy 0837 New 21 Game 35.7% Medium 0838 Push Dominoes Go 50.5% Medium 0839 Similar String Groups Go 42.6% Hard 0840 Magic Squares In Grid 38.0% Medium 0841 Keys and Rooms Go 66.9% Medium 0842 Split Array into Fibonacci Sequence Go 37.2% Medium 0843 Guess the Word 45.6% Hard 0844 Backspace String Compare Go 47.2% Easy 0845 Longest Mountain in Array Go 38.8% Medium 0846 Hand of Straights 55.7% Medium 0847 Shortest Path Visiting All Nodes 54.7% Hard 0848 Shifting Letters 45.2% Medium 0849 Maximize Distance to Closest Person 44.7% Medium 0850 Rectangle Area II Go 48.6% Hard 0851 Loud and Rich Go 53.1% Medium 0852 Peak Index in a Mountain Array Go 71.6% Easy 0853 Car Fleet Go 44.9% Medium 0854 K-Similar Strings 38.6% Hard 0855 Exam Room 43.4% Medium 0856 Score of Parentheses Go 65.0% Medium 0857 Minimum Cost to Hire K Workers 50.9% Hard 0858 Mirror Reflection 59.5% Medium 0859 Buddy Strings 28.8% Easy 0860 Lemonade Change 51.9% Easy 0861 Score After Flipping Matrix 74.0% Medium 0862 Shortest Subarray with Sum at Least K Go 25.3% Hard 0863 All Nodes Distance K in Binary Tree Go 58.7% Medium 0864 Shortest Path to Get All Keys Go 42.9% Hard 0865 Smallest Subtree with all the Deepest Nodes 65.7% Medium 0866 Prime Palindrome 25.1% Medium 0867 Transpose Matrix Go 61.8% Easy 0868 Binary Gap 61.3% Easy 0869 Reordered Power of 2 Go 61.3% Medium 0870 Advantage Shuffle Go 50.7% Medium 0871 Minimum Number of Refueling Stops 34.8% Hard 0872 Leaf-Similar Trees Go 64.5% Easy 0873 Length of Longest Fibonacci Subsequence 48.4% Medium 0874 Walking Robot Simulation Go 36.8% Easy 0875 Koko Eating Bananas Go 53.7% Medium 0876 Middle of the Linked List Go 69.5% Easy 0877 Stone Game Go 67.7% Medium 0878 Nth Magical Number Go 29.0% Hard 0879 Profitable Schemes 40.2% Hard 0880 Decoded String at Index Go 28.2% Medium 0881 Boats to Save People Go 49.3% Medium 0882 Reachable Nodes In Subdivided Graph 43.4% Hard 0883 Projection Area of 3D Shapes 68.9% Easy 0884 Uncommon Words from Two Sentences Go 64.5% Easy 0885 Spiral Matrix III Go 71.3% Medium 0886 Possible Bipartition 45.8% Medium 0887 Super Egg Drop Go 27.0% Hard 0888 Fair Candy Swap Go 59.3% Easy 0889 Construct Binary Tree from Preorder and Postorder Traversal 68.2% Medium 0890 Find and Replace Pattern Go 75.5% Medium 0891 Sum of Subsequence Widths Go 33.4% Hard 0892 Surface Area of 3D Shapes Go 60.3% Easy 0893 Groups of Special-Equivalent Strings 69.9% Easy 0894 All Possible Full Binary Trees 77.8% Medium 0895 Maximum Frequency Stack Go 63.6% Hard 0896 Monotonic Array Go 57.8% Easy 0897 Increasing Order Search Tree Go 75.0% Easy 0898 Bitwise ORs of Subarrays Go 35.2% Medium 0899 Orderly Queue 53.8% Hard 0900 RLE Iterator 56.4% Medium 0901 Online Stock Span Go 61.8% Medium 0902 Numbers At Most N Given Digit Set 36.2% Hard 0903 Valid Permutations for DI Sequence 55.8% Hard 0904 Fruit Into Baskets Go 43.2% Medium 0905 Sort Array By Parity 75.1% Easy 0906 Super Palindromes 38.8% Hard 0907 Sum of Subarray Minimums Go 32.9% Medium 0908 Smallest Range I 66.5% Easy 0909 Snakes and Ladders Go 39.4% Medium 0910 Smallest Range II Go 31.4% Medium 0911 Online Election Go 51.8% Medium 0912 Sort an Array 63.8% Medium 0913 Cat and Mouse 35.0% Hard 0914 X of a Kind in a Deck of Cards Go 33.7% Easy 0915 Partition Array into Disjoint Intervals 47.2% Medium 0916 Word Subsets Go 52.7% Medium 0917 Reverse Only Letters 59.5% Easy 0918 Maximum Sum Circular Subarray Go 34.6% Medium 0919 Complete Binary Tree Inserter 59.9% Medium 0920 Number of Music Playlists Go 48.4% Hard 0921 Minimum Add to Make Parentheses Valid Go 75.4% Medium 0922 Sort Array By Parity II Go 70.7% Easy 0923 3Sum With Multiplicity Go 41.0% Medium 0924 Minimize Malware Spread Go 41.8% Hard 0925 Long Pressed Name Go 36.3% Easy 0926 Flip String to Monotone Increasing 53.7% Medium 0927 Three Equal Parts Go 34.8% Hard 0928 Minimize Malware Spread II Go 41.5% Hard 0929 Unique Email Addresses 67.2% Easy 0930 Binary Subarrays With Sum Go 45.7% Medium 0931 Minimum Falling Path Sum 64.5% Medium 0932 Beautiful Array 61.6% Medium 0933 Number of Recent Calls Go 72.6% Easy 0934 Shortest Bridge 50.7% Medium 0935 Knight Dialer 47.2% Medium 0936 Stamping The Sequence 53.3% Hard 0937 Reorder Data in Log Files 55.1% Easy 0938 Range Sum of BST Go 83.5% Easy 0939 Minimum Area Rectangle 52.6% Medium 0940 Distinct Subsequences II 41.4% Hard 0941 Valid Mountain Array 32.7% Easy 0942 DI String Match Go 74.2% Easy 0943 Find the Shortest Superstring 46.0% Hard 0944 Delete Columns to Make Sorted 70.6% Easy 0945 Minimum Increment to Make Array Unique 47.3% Medium 0946 Validate Stack Sequences Go 64.5% Medium 0947 Most Stones Removed with Same Row or Column Go 55.9% Medium 0948 Bag of Tokens 46.1% Medium 0949 Largest Time for Given Digits Go 36.0% Medium 0950 Reveal Cards In Increasing Order 75.9% Medium 0951 Flip Equivalent Binary Trees 66.0% Medium 0952 Largest Component Size by Common Factor Go 36.5% Hard 0953 Verifying an Alien Dictionary Go 52.2% Easy 0954 Array of Doubled Pairs 34.9% Medium 0955 Delete Columns to Make Sorted II 34.0% Medium 0956 Tallest Billboard 39.8% Hard 0957 Prison Cells After N Days 40.0% Medium 0958 Check Completeness of a Binary Tree 52.6% Medium 0959 Regions Cut By Slashes Go 67.6% Medium 0960 Delete Columns to Make Sorted III 55.6% Hard 0961 N-Repeated Element in Size 2N Array Go 74.9% Easy 0962 Maximum Width Ramp 46.9% Medium 0963 Minimum Area Rectangle II 53.3% Medium 0964 Least Operators to Express Number 45.4% Hard 0965 Univalued Binary Tree 68.1% Easy 0966 Vowel Spellchecker Go 51.8% Medium 0967 Numbers With Same Consecutive Differences 45.9% Medium 0968 Binary Tree Cameras Go 40.6% Hard 0969 Pancake Sorting Go 69.0% Medium 0970 Powerful Integers Go 43.4% Medium 0971 Flip Binary Tree To Match Preorder Traversal Go 49.9% Medium 0972 Equal Rational Numbers 42.2% Hard 0973 K Closest Points to Origin Go 65.0% Medium 0974 Subarray Sums Divisible by K 51.6% Medium 0975 Odd Even Jump 41.2% Hard 0976 Largest Perimeter Triangle Go 59.5% Easy 0977 Squares of a Sorted Array Go 71.6% Easy 0978 Longest Turbulent Subarray Go 46.7% Medium 0979 Distribute Coins in Binary Tree Go 70.2% Medium 0980 Unique Paths III Go 77.1% Hard 0981 Time Based Key-Value Store Go 54.5% Medium 0982 Triples with Bitwise AND Equal To Zero 56.8% Hard 0983 Minimum Cost For Tickets 63.0% Medium 0984 String Without AAA or BBB Go 39.1% Medium 0985 Sum of Even Numbers After Queries Go 60.5% Easy 0986 Interval List Intersections Go 68.9% Medium 0987 Vertical Order Traversal of a Binary Tree Go 39.3% Hard 0988 Smallest String Starting From Leaf 47.2% Medium 0989 Add to Array-Form of Integer Go 45.0% Easy 0990 Satisfiability of Equality Equations Go 47.6% Medium 0991 Broken Calculator Go 49.8% Medium 0992 Subarrays with K Different Integers Go 51.5% Hard 0993 Cousins in Binary Tree Go 52.4% Easy 0994 Rotting Oranges 49.8% Medium 0995 Minimum Number of K Consecutive Bit Flips Go 50.3% Hard 0996 Number of Squareful Arrays Go 48.7% Hard 0997 Find the Town Judge 49.9% Easy 0998 Maximum Binary Tree II 64.4% Medium 0999 Available Captures for Rook Go 67.7% Easy 1000 Minimum Cost to Merge Stones 41.0% Hard 1001 Grid Illumination 35.8% Hard 1002 Find Common Characters Go 68.7% Easy 1003 Check If Word Is Valid After Substitutions Go 57.0% Medium 1004 Max Consecutive Ones III Go 61.3% Medium 1005 Maximize Sum Of Array After K Negations Go 52.3% Easy 1006 Clumsy Factorial Go 54.1% Medium 1007 Minimum Domino Rotations For Equal Row 50.9% Medium 1008 Construct Binary Search Tree from Preorder Traversal 78.9% Medium 1009 Complement of Base 10 Integer 61.2% Easy 1010 Pairs of Songs With Total Durations Divisible by 60 51.2% Medium 1011 Capacity To Ship Packages Within D Days Go 60.5% Medium 1012 Numbers With Repeated Digits 38.0% Hard 1013 Partition Array Into Three Parts With Equal Sum 46.9% Easy 1014 Best Sightseeing Pair 53.1% Medium 1015 Smallest Integer Divisible by K 42.0% Medium 1016 Binary String With Substrings Representing 1 To N 58.5% Medium 1017 Convert to Base -2 Go 59.4% Medium 1018 Binary Prefix Divisible By 5 Go 47.6% Easy 1019 Next Greater Node In Linked List Go 58.4% Medium 1020 Number of Enclaves Go 59.8% Medium 1021 Remove Outermost Parentheses Go 79.3% Easy 1022 Sum of Root To Leaf Binary Numbers 71.9% Easy 1023 Camelcase Matching 57.9% Medium 1024 Video Stitching 49.0% Medium 1025 Divisor Game Go 66.2% Easy 1026 Maximum Difference Between Node and Ancestor Go 70.2% Medium 1027 Longest Arithmetic Subsequence 49.2% Medium 1028 Recover a Tree From Preorder Traversal Go 71.3% Hard 1029 Two City Scheduling 58.6% Medium 1030 Matrix Cells in Distance Order Go 68.5% Easy 1031 Maximum Sum of Two Non-Overlapping Subarrays 59.1% Medium 1032 Stream of Characters 48.7% Hard 1033 Moving Stones Until Consecutive 43.8% Easy 1034 Coloring A Border 46.1% Medium 1035 Uncrossed Lines 56.5% Medium 1036 Escape a Large Maze 34.2% Hard 1037 Valid Boomerang Go 37.4% Easy 1038 Binary Search Tree to Greater Sum Tree Go 83.2% Medium 1039 Minimum Score Triangulation of Polygon 51.0% Medium 1040 Moving Stones Until Consecutive II Go 54.8% Medium 1041 Robot Bounded In Circle 54.8% Medium 1042 Flower Planting With No Adjacent 49.0% Medium 1043 Partition Array for Maximum Sum 68.2% Medium 1044 Longest Duplicate Substring 31.0% Hard 1045 Customers Who Bought All Products 67.7% Medium 1046 Last Stone Weight 62.5% Easy 1047 Remove All Adjacent Duplicates In String Go 71.8% Easy 1048 Longest String Chain Go 56.3% Medium 1049 Last Stone Weight II Go 47.4% Medium 1050 Actors and Directors Who Cooperated At Least Three Times 72.3% Easy 1051 Height Checker Go 73.1% Easy 1052 Grumpy Bookstore Owner Go 56.0% Medium 1053 Previous Permutation With One Swap 51.7% Medium 1054 Distant Barcodes Go 44.6% Medium 1055 Shortest Way to Form String 57.4% Medium 1056 Confusing Number 46.7% Easy 1057 Campus Bikes 58.0% Medium 1058 Minimize Rounding Error to Meet Target 44.0% Medium 1059 All Paths from Source Lead to Destination 43.9% Medium 1060 Missing Element in Sorted Array 55.2% Medium 1061 Lexicographically Smallest Equivalent String 67.0% Medium 1062 Longest Repeating Substring 58.6% Medium 1063 Number of Valid Subarrays 72.3% Hard 1064 Fixed Point 64.2% Easy 1065 Index Pairs of a String 61.2% Easy 1066 Campus Bikes II 54.3% Medium 1067 Digit Count in Range 41.9% Hard 1068 Product Sales Analysis I 81.8% Easy 1069 Product Sales Analysis II 83.2% Easy 1070 Product Sales Analysis III 50.2% Medium 1071 Greatest Common Divisor of Strings 51.9% Easy 1072 Flip Columns For Maximum Number of Equal Rows 61.9% Medium 1073 Adding Two Negabinary Numbers Go 34.8% Medium 1074 Number of Submatrices That Sum to Target Go 65.2% Hard 1075 Project Employees I 66.5% Easy 1076 Project Employees II 52.5% Easy 1077 Project Employees III 78.3% Medium 1078 Occurrences After Bigram Go 64.8% Easy 1079 Letter Tile Possibilities Go 76.1% Medium 1080 Insufficient Nodes in Root to Leaf Paths 50.4% Medium 1081 Smallest Subsequence of Distinct Characters 53.8% Medium 1082 Sales Analysis I 74.4% Easy 1083 Sales Analysis II 50.9% Easy 1084 Sales Analysis III 54.5% Easy 1085 Sum of Digits in the Minimum Number 75.4% Easy 1086 High Five 76.6% Easy 1087 Brace Expansion 63.4% Medium 1088 Confusing Number II 46.0% Hard 1089 Duplicate Zeros Go 51.5% Easy 1090 Largest Values From Labels 60.3% Medium 1091 Shortest Path in Binary Matrix Go 40.6% Medium 1092 Shortest Common Supersequence 54.0% Hard 1093 Statistics from a Large Sample Go 47.7% Medium 1094 Car Pooling 59.6% Medium 1095 Find in Mountain Array 36.1% Hard 1096 Brace Expansion II 63.1% Hard 1097 Game Play Analysis V 57.1% Hard 1098 Unpopular Books 45.6% Medium 1099 Two Sum Less Than K 60.7% Easy 1100 Find K-Length Substrings With No Repeated Characters 73.2% Medium 1101 The Earliest Moment When Everyone Become Friends 67.8% Medium 1102 Path With Maximum Minimum Value 51.4% Medium 1103 Distribute Candies to People 63.4% Easy 1104 Path In Zigzag Labelled Binary Tree 73.7% Medium 1105 Filling Bookcase Shelves Go 57.7% Medium 1106 Parsing A Boolean Expression 59.6% Hard 1107 New Users Daily Count 46.0% Medium 1108 Defanging an IP Address Go 88.5% Easy 1109 Corporate Flight Bookings 54.5% Medium 1110 Delete Nodes And Return Forest Go 68.2% Medium 1111 Maximum Nesting Depth of Two Valid Parentheses Strings Go 72.7% Medium 1112 Highest Grade For Each Student 72.7% Medium 1113 Reported Posts 66.4% Easy 1114 Print in Order 67.5% Easy 1115 Print FooBar Alternately 59.0% Medium 1116 Print Zero Even Odd 58.2% Medium 1117 Building H2O 53.1% Medium 1118 Number of Days in a Month 57.3% Easy 1119 Remove Vowels from a String 90.5% Easy 1120 Maximum Average Subtree 64.5% Medium 1121 Divide Array Into Increasing Sequences 58.9% Hard 1122 Relative Sort Array Go 67.9% Easy 1123 Lowest Common Ancestor of Deepest Leaves Go 68.5% Medium 1124 Longest Well-Performing Interval 33.5% Medium 1125 Smallest Sufficient Team 47.2% Hard 1126 Active Businesses 68.3% Medium 1127 User Purchase Platform 50.8% Hard 1128 Number of Equivalent Domino Pairs Go 46.0% Easy 1129 Shortest Path with Alternating Colors 40.7% Medium 1130 Minimum Cost Tree From Leaf Values 67.5% Medium 1131 Maximum of Absolute Value Expression 51.4% Medium 1132 Reported Posts II 34.4% Medium 1133 Largest Unique Number 67.2% Easy 1134 Armstrong Number 77.7% Easy 1135 Connecting Cities With Minimum Cost 60.0% Medium 1136 Parallel Courses 60.7% Medium 1137 N-th Tribonacci Number Go 55.6% Easy 1138 Alphabet Board Path 51.6% Medium 1139 Largest 1-Bordered Square 48.7% Medium 1140 Stone Game II 64.6% Medium 1141 User Activity for the Past 30 Days I 54.7% Easy 1142 User Activity for the Past 30 Days II 35.5% Easy 1143 Longest Common Subsequence Go 58.8% Medium 1144 Decrease Elements To Make Array Zigzag 46.5% Medium 1145 Binary Tree Coloring Game Go 51.1% Medium 1146 Snapshot Array 37.0% Medium 1147 Longest Chunked Palindrome Decomposition 59.8% Hard 1148 Article Views I 77.1% Easy 1149 Article Views II 48.2% Medium 1150 Check If a Number Is Majority Element in a Sorted Array 57.1% Easy 1151 Minimum Swaps to Group All 1's Together 59.1% Medium 1152 Analyze User Website Visit Pattern 43.2% Medium 1153 String Transforms Into Another String 35.7% Hard 1154 Day of the Year Go 49.7% Easy 1155 Number of Dice Rolls With Target Sum 47.7% Medium 1156 Swap For Longest Repeated Character Substring 47.1% Medium 1157 Online Majority Element In Subarray Go 41.3% Hard 1158 Market Analysis I 64.7% Medium 1159 Market Analysis II 56.7% Hard 1160 Find Words That Can Be Formed by Characters Go 67.9% Easy 1161 Maximum Level Sum of a Binary Tree 67.9% Medium 1162 As Far from Land as Possible 46.0% Medium 1163 Last Substring in Lexicographical Order 36.1% Hard 1164 Product Price at a Given Date 68.9% Medium 1165 Single-Row Keyboard 85.5% Easy 1166 Design File System 58.9% Medium 1167 Minimum Cost to Connect Sticks 65.4% Medium 1168 Optimize Water Distribution in a Village 61.4% Hard 1169 Invalid Transactions 30.6% Medium 1170 Compare Strings by Frequency of the Smallest Character Go 60.6% Medium 1171 Remove Zero Sum Consecutive Nodes from Linked List Go 41.6% Medium 1172 Dinner Plate Stacks 36.9% Hard 1173 Immediate Food Delivery I 83.0% Easy 1174 Immediate Food Delivery II 62.6% Medium 1175 Prime Arrangements Go 51.8% Easy 1176 Diet Plan Performance 53.7% Easy 1177 Can Make Palindrome from Substring 36.2% Medium 1178 Number of Valid Words for Each Puzzle Go 40.4% Hard 1179 Reformat Department Table 82.1% Easy 1180 Count Substrings with Only One Distinct Letter 78.0% Easy 1181 Before and After Puzzle 44.6% Medium 1182 Shortest Distance to Target Color 54.2% Medium 1183 Maximum Number of Ones 58.2% Hard 1184 Distance Between Bus Stops Go 53.9% Easy 1185 Day of the Week Go 60.3% Easy 1186 Maximum Subarray Sum with One Deletion 39.6% Medium 1187 Make Array Strictly Increasing 43.1% Hard 1188 Design Bounded Blocking Queue 73.3% Medium 1189 Maximum Number of Balloons Go 62.0% Easy 1190 Reverse Substrings Between Each Pair of Parentheses Go 64.7% Medium 1191 K-Concatenation Maximum Sum 24.7% Medium 1192 Critical Connections in a Network 51.6% Hard 1193 Monthly Transactions I 68.8% Medium 1194 Tournament Winners 52.7% Hard 1195 Fizz Buzz Multithreaded 71.1% Medium 1196 How Many Apples Can You Put into the Basket 68.3% Easy 1197 Minimum Knight Moves 38.3% Medium 1198 Find Smallest Common Element in All Rows 76.3% Medium 1199 Minimum Time to Build Blocks 39.1% Hard 1200 Minimum Absolute Difference Go 67.2% Easy 1201 Ugly Number III Go 26.7% Medium 1202 Smallest String With Swaps Go 49.5% Medium 1203 Sort Items by Groups Respecting Dependencies Go 48.4% Hard 1204 Last Person to Fit in the Bus 72.4% Medium 1205 Monthly Transactions II 45.3% Medium 1206 Design Skiplist 59.0% Hard 1207 Unique Number of Occurrences Go 72.2% Easy 1208 Get Equal Substrings Within Budget Go 44.8% Medium 1209 Remove All Adjacent Duplicates in String II Go 57.0% Medium 1210 Minimum Moves to Reach Target with Rotations 46.9% Hard 1211 Queries Quality and Percentage 70.2% Easy 1212 Team Scores in Football Tournament 56.6% Medium 1213 Intersection of Three Sorted Arrays 79.6% Easy 1214 Two Sum BSTs 67.7% Medium 1215 Stepping Numbers 44.1% Medium 1216 Valid Palindrome III 50.4% Hard 1217 Minimum Cost to Move Chips to The Same Position Go 70.7% Easy 1218 Longest Arithmetic Subsequence of Given Difference 47.5% Medium 1219 Path with Maximum Gold 66.1% Medium 1220 Count Vowels Permutation 54.3% Hard 1221 Split a String in Balanced Strings Go 84.5% Easy 1222 Queens That Can Attack the King 69.8% Medium 1223 Dice Roll Simulation 47.0% Hard 1224 Maximum Equal Frequency 35.8% Hard 1225 Report Contiguous Dates 63.2% Hard 1226 The Dining Philosophers 60.5% Medium 1227 Airplane Seat Assignment Probability 62.7% Medium 1228 Missing Number In Arithmetic Progression 51.2% Easy 1229 Meeting Scheduler 54.6% Medium 1230 Toss Strange Coins 50.4% Medium 1231 Divide Chocolate 53.8% Hard 1232 Check If It Is a Straight Line Go 42.7% Easy 1233 Remove Sub-Folders from the Filesystem 63.2% Medium 1234 Replace the Substring for Balanced String Go 34.8% Medium 1235 Maximum Profit in Job Scheduling Go 48.3% Hard 1236 Web Crawler 64.9% Medium 1237 Find Positive Integer Solution for a Given Equation 70.4% Medium 1238 Circular Permutation in Binary Representation 67.1% Medium 1239 Maximum Length of a Concatenated String with Unique Characters Go 50.5% Medium 1240 Tiling a Rectangle with the Fewest Squares 52.8% Hard 1241 Number of Comments per Post 68.0% Easy 1242 Web Crawler Multithreaded 48.1% Medium 1243 Array Transformation 49.9% Easy 1244 Design A Leaderboard 66.9% Medium 1245 Tree Diameter 61.6% Medium 1246 Palindrome Removal 45.8% Hard 1247 Minimum Swaps to Make Strings Equal 63.1% Medium 1248 Count Number of Nice Subarrays 56.7% Medium 1249 Minimum Remove to Make Valid Parentheses Go 64.5% Medium 1250 Check If It Is a Good Array 56.9% Hard 1251 Average Selling Price 83.1% Easy 1252 Cells with Odd Values in a Matrix Go 78.5% Easy 1253 Reconstruct a 2-Row Binary Matrix 42.2% Medium 1254 Number of Closed Islands Go 62.2% Medium 1255 Maximum Score Words Formed by Letters 70.4% Hard 1256 Encode Number 68.3% Medium 1257 Smallest Common Region 61.5% Medium 1258 Synonymous Sentences 59.8% Medium 1259 Handshakes That Don't Cross 54.5% Hard 1260 Shift 2D Grid Go 61.9% Easy 1261 Find Elements in a Contaminated Binary Tree 75.0% Medium 1262 Greatest Sum Divisible by Three 50.2% Medium 1263 Minimum Moves to Move a Box to Their Target Location 46.0% Hard 1264 Page Recommendations 68.7% Medium 1265 Print Immutable Linked List in Reverse 94.1% Medium 1266 Minimum Time Visiting All Points Go 79.2% Easy 1267 Count Servers that Communicate 57.7% Medium 1268 Search Suggestions System Go 65.5% Medium 1269 Number of Ways to Stay in the Same Place After Some Steps 43.3% Hard 1270 All People Report to the Given Manager 88.2% Medium 1271 Hexspeak 55.9% Easy 1272 Remove Interval 58.9% Medium 1273 Delete Tree Nodes 61.3% Medium 1274 Number of Ships in a Rectangle 66.1% Hard 1275 Find Winner on a Tic Tac Toe Game Go 52.9% Easy 1276 Number of Burgers with No Waste of Ingredients 50.5% Medium 1277 Count Square Submatrices with All Ones 73.1% Medium 1278 Palindrome Partitioning III 61.4% Hard 1279 Traffic Light Controlled Intersection 76.3% Easy 1280 Students and Examinations 75.6% Easy 1281 Subtract the Product and Sum of Digits of an Integer Go 85.6% Easy 1282 Group the People Given the Group Size They Belong To 84.6% Medium 1283 Find the Smallest Divisor Given a Threshold Go 50.7% Medium 1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix 70.3% Hard 1285 Find the Start and End Number of Continuous Ranges 87.7% Medium 1286 Iterator for Combination 71.0% Medium 1287 Element Appearing More Than 25% In Sorted Array Go 59.9% Easy 1288 Remove Covered Intervals 57.6% Medium 1289 Minimum Falling Path Sum II 63.0% Hard 1290 Convert Binary Number in a Linked List to Integer Go 81.7% Easy 1291 Sequential Digits 57.4% Medium 1292 Maximum Side Length of a Square with Sum Less than or Equal to Threshold 51.3% Medium 1293 Shortest Path in a Grid with Obstacles Elimination 43.3% Hard 1294 Weather Type in Each Country 67.2% Easy 1295 Find Numbers with Even Number of Digits Go 78.2% Easy 1296 Divide Array in Sets of K Consecutive Numbers 55.8% Medium 1297 Maximum Number of Occurrences of a Substring 51.4% Medium 1298 Maximum Candies You Can Get from Boxes 60.1% Hard 1299 Replace Elements with Greatest Element on Right Side Go 74.5% Easy 1300 Sum of Mutated Array Closest to Target Go 42.6% Medium 1301 Number of Paths with Max Score 38.2% Hard 1302 Deepest Leaves Sum Go 85.4% Medium 1303 Find the Team Size 90.0% Easy 1304 Find N Unique Integers Sum up to Zero Go 76.5% Easy 1305 All Elements in Two Binary Search Trees Go 77.9% Medium 1306 Jump Game III Go 61.7% Medium 1307 Verbal Arithmetic Puzzle 35.9% Hard 1308 Running Total for Different Genders 88.2% Medium 1309 Decrypt String from Alphabet to Integer Mapping 77.9% Easy 1310 XOR Queries of a Subarray Go 69.8% Medium 1311 Get Watched Videos by Your Friends 44.4% Medium 1312 Minimum Insertion Steps to Make a String Palindrome 60.8% Hard 1313 Decompress Run-Length Encoded List Go 85.5% Easy 1314 Matrix Block Sum 74.0% Medium 1315 Sum of Nodes with Even-Valued Grandparent 84.6% Medium 1316 Distinct Echo Substrings 49.5% Hard 1317 Convert Integer to the Sum of Two No-Zero Integers Go 57.1% Easy 1318 Minimum Flips to Make a OR b Equal to c 64.1% Medium 1319 Number of Operations to Make Network Connected Go 55.6% Medium 1320 Minimum Distance to Type a Word Using Two Fingers 61.6% Hard 1321 Restaurant Growth 72.4% Medium 1322 Ads Performance 58.6% Easy 1323 Maximum 69 Number 78.1% Easy 1324 Print Words Vertically 58.9% Medium 1325 Delete Leaves With a Given Value 74.2% Medium 1326 Minimum Number of Taps to Open to Water a Garden 47.5% Hard 1327 List the Products Ordered in a Period 77.9% Easy 1328 Break a Palindrome 49.1% Medium 1329 Sort the Matrix Diagonally Go 81.4% Medium 1330 Reverse Subarray To Maximize Array Value 37.2% Hard 1331 Rank Transform of an Array 57.3% Easy 1332 Remove Palindromic Subsequences Go 68.7% Easy 1333 Filter Restaurants by Vegan-Friendly, Price and Distance 57.9% Medium 1334 Find the City With the Smallest Number of Neighbors at a Threshold Distance 48.3% Medium 1335 Minimum Difficulty of a Job Schedule 56.5% Hard 1336 Number of Transactions per Visit 50.2% Hard 1337 The K Weakest Rows in a Matrix Go 72.0% Easy 1338 Reduce Array Size to The Half 67.6% Medium 1339 Maximum Product of Splitted Binary Tree 38.6% Medium 1340 Jump Game V 60.3% Hard 1341 Movie Rating 59.1% Medium 1342 Number of Steps to Reduce a Number to Zero 85.6% Easy 1343 Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold 65.5% Medium 1344 Angle Between Hands of a Clock 61.5% Medium 1345 Jump Game IV 42.2% Hard 1346 Check If N and Its Double Exist 35.7% Easy 1347 Minimum Number of Steps to Make Two Strings Anagram 75.0% Medium 1348 Tweet Counts Per Frequency 39.6% Medium 1349 Maximum Students Taking Exam 44.8% Hard 1350 Students With Invalid Departments 90.3% Easy 1351 Count Negative Numbers in a Sorted Matrix 75.5% Easy 1352 Product of the Last K Numbers 45.9% Medium 1353 Maximum Number of Events That Can Be Attended Go 30.6% Medium 1354 Construct Target Array With Multiple Sums 31.4% Hard 1355 Activity Participants 74.7% Medium 1356 Sort Integers by The Number of 1 Bits 70.6% Easy 1357 Apply Discount Every n Orders 67.3% Medium 1358 Number of Substrings Containing All Three Characters 61.0% Medium 1359 Count All Valid Pickup and Delivery Options 55.7% Hard 1360 Number of Days Between Two Dates 46.5% Easy 1361 Validate Binary Tree Nodes 42.7% Medium 1362 Closest Divisors 58.3% Medium 1363 Largest Multiple of Three 34.5% Hard 1364 Number of Trusted Contacts of a Customer 79.2% Medium 1365 How Many Numbers Are Smaller Than the Current Number 85.9% Easy 1366 Rank Teams by Votes 55.9% Medium 1367 Linked List in Binary Tree 41.1% Medium 1368 Minimum Cost to Make at Least One Valid Path in a Grid 58.2% Hard 1369 Get the Second Most Recent Activity 69.0% Hard 1370 Increasing Decreasing String 77.6% Easy 1371 Find the Longest Substring Containing Vowels in Even Counts 60.9% Medium 1372 Longest ZigZag Path in a Binary Tree 55.6% Medium 1373 Maximum Sum BST in Binary Tree 37.3% Hard 1374 Generate a String With Characters That Have Odd Counts 76.9% Easy 1375 Bulb Switcher III 64.3% Medium 1376 Time Needed to Inform All Employees 57.2% Medium 1377 Frog Position After T Seconds 35.8% Hard 1378 Replace Employee ID With The Unique Identifier 90.6% Easy 1379 Find a Corresponding Node of a Binary Tree in a Clone of That Tree 84.8% Medium 1380 Lucky Numbers in a Matrix Go 70.4% Easy 1381 Design a Stack With Increment Operation 76.6% Medium 1382 Balance a Binary Search Tree 77.1% Medium 1383 Maximum Performance of a Team Go 41.2% Hard 1384 Total Sales Amount by Year 65.3% Hard 1385 Find the Distance Value Between Two Arrays Go 66.6% Easy 1386 Cinema Seat Allocation 37.0% Medium 1387 Sort Integers by The Power Value 70.7% Medium 1388 Pizza With 3n Slices 46.7% Hard 1389 Create Target Array in the Given Order Go 85.1% Easy 1390 Four Divisors 39.8% Medium 1391 Check if There is a Valid Path in a Grid 45.5% Medium 1392 Longest Happy Prefix 42.8% Hard 1393 Capital Gain/Loss 91.1% Medium 1394 Find Lucky Integer in an Array 63.1% Easy 1395 Count Number of Teams 72.5% Medium 1396 Design Underground System Go 71.8% Medium 1397 Find All Good Strings 39.3% Hard 1398 Customers Who Bought Products A and B but Not C 81.9% Medium 1399 Count Largest Group 65.4% Easy 1400 Construct K Palindrome Strings 63.3% Medium 1401 Circle and Rectangle Overlapping 42.7% Medium 1402 Reducing Dishes 72.0% Hard 1403 Minimum Subsequence in Non-Increasing Order 71.9% Easy 1404 Number of Steps to Reduce a Number in Binary Representation to One 50.2% Medium 1405 Longest Happy String 53.2% Medium 1406 Stone Game III 59.0% Hard 1407 Top Travellers 84.1% Easy 1408 String Matching in an Array 63.7% Easy 1409 Queries on a Permutation With Key 82.1% Medium 1410 HTML Entity Parser 53.6% Medium 1411 Number of Ways to Paint N × 3 Grid 60.8% Hard 1412 Find the Quiet Students in All Exams 63.3% Hard 1413 Minimum Value to Get Positive Step by Step Sum 65.5% Easy 1414 Find the Minimum Number of Fibonacci Numbers Whose Sum Is K 63.1% Medium 1415 The k-th Lexicographical String of All Happy Strings of Length n 70.3% Medium 1416 Restore The Array 36.8% Hard 1417 Reformat The String 56.6% Easy 1418 Display Table of Food Orders in a Restaurant 70.3% Medium 1419 Minimum Number of Frogs Croaking 48.2% Medium 1420 Build Array Where You Can Find The Maximum Exactly K Comparisons 64.2% Hard 1421 NPV Queries 82.2% Medium 1422 Maximum Score After Splitting a String 57.6% Easy 1423 Maximum Points You Can Obtain from Cards Go 48.5% Medium 1424 Diagonal Traverse II 46.9% Medium 1425 Constrained Subsequence Sum 45.1% Hard 1426 Counting Elements 59.2% Easy 1427 Perform String Shifts 53.6% Easy 1428 Leftmost Column with at Least a One 50.1% Medium 1429 First Unique Number 50.4% Medium 1430 Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree 45.3% Medium 1431 Kids With the Greatest Number of Candies 88.1% Easy 1432 Max Difference You Can Get From Changing an Integer 43.0% Medium 1433 Check If a String Can Break Another String 67.7% Medium 1434 Number of Ways to Wear Different Hats to Each Other 40.2% Hard 1435 Create a Session Bar Chart 78.6% Easy 1436 Destination City 77.2% Easy 1437 Check If All 1's Are at Least Length K Places Away Go 61.0% Easy 1438 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit Go 44.8% Medium 1439 Find the Kth Smallest Sum of a Matrix With Sorted Rows Go 61.1% Hard 1440 Evaluate Boolean Expression 75.1% Medium 1441 Build an Array With Stack Operations 70.4% Easy 1442 Count Triplets That Can Form Two Arrays of Equal XOR Go 72.9% Medium 1443 Minimum Time to Collect All Apples in a Tree 54.6% Medium 1444 Number of Ways of Cutting a Pizza 54.3% Hard 1445 Apples & Oranges 91.2% Medium 1446 Consecutive Characters 61.2% Easy 1447 Simplified Fractions 62.7% Medium 1448 Count Good Nodes in Binary Tree 72.0% Medium 1449 Form Largest Integer With Digits That Add up to Target 45.2% Hard 1450 Number of Students Doing Homework at a Given Time 76.7% Easy 1451 Rearrange Words in a Sentence 60.5% Medium 1452 People Whose List of Favorite Companies Is Not a Subset of Another List 55.5% Medium 1453 Maximum Number of Darts Inside of a Circular Dartboard 36.1% Hard 1454 Active Users 38.7% Medium 1455 Check If a Word Occurs As a Prefix of Any Word in a Sentence Go 64.8% Easy 1456 Maximum Number of Vowels in a Substring of Given Length 55.7% Medium 1457 Pseudo-Palindromic Paths in a Binary Tree 68.9% Medium 1458 Max Dot Product of Two Subsequences 43.7% Hard 1459 Rectangles Area 66.2% Medium 1460 Make Two Arrays Equal by Reversing Sub-arrays 72.3% Easy 1461 Check If a String Contains All Binary Codes of Size K Go 54.2% Medium 1462 Course Schedule IV 46.2% Medium 1463 Cherry Pickup II Go 68.6% Hard 1464 Maximum Product of Two Elements in an Array Go 77.0% Easy 1465 Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts Go 36.7% Medium 1466 Reorder Routes to Make All Paths Lead to the City Zero 61.9% Medium 1467 Probability of a Two Boxes Having The Same Number of Distinct Balls 60.7% Hard 1468 Calculate Salaries 82.4% Medium 1469 Find All The Lonely Nodes 80.7% Easy 1470 Shuffle the Array Go 88.1% Easy 1471 The k Strongest Values in an Array 58.9% Medium 1472 Design Browser History 72.6% Medium 1473 Paint House III 49.2% Hard 1474 Delete N Nodes After M Nodes of a Linked List 73.4% Easy 1475 Final Prices With a Special Discount in a Shop 74.8% Easy 1476 Subrectangle Queries 87.9% Medium 1477 Find Two Non-overlapping Sub-arrays Each With Target Sum 35.6% Medium 1478 Allocate Mailboxes 54.0% Hard 1479 Sales by Day of the Week 83.0% Hard 1480 Running Sum of 1d Array Go 88.8% Easy 1481 Least Number of Unique Integers after K Removals 56.1% Medium 1482 Minimum Number of Days to Make m Bouquets Go 52.3% Medium 1483 Kth Ancestor of a Tree Node 33.1% Hard 1484 Group Sold Products By The Date 85.0% Easy 1485 Clone Binary Tree With Random Pointer 79.6% Medium 1486 XOR Operation in an Array Go 83.9% Easy 1487 Making File Names Unique 31.9% Medium 1488 Avoid Flood in The City 24.5% Medium 1489 Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree 51.7% Hard 1490 Clone N-ary Tree 82.9% Medium 1491 Average Salary Excluding the Minimum and Maximum Salary 67.9% Easy 1492 The kth Factor of n 62.9% Medium 1493 Longest Subarray of 1's After Deleting One Element 57.8% Medium 1494 Parallel Courses II 30.9% Hard 1495 Friendly Movies Streamed Last Month 50.9% Easy 1496 Path Crossing 55.1% Easy 1497 Check If Array Pairs Are Divisible by k 40.3% Medium 1498 Number of Subsequences That Satisfy the Given Sum Condition 39.2% Medium 1499 Max Value of Equation 45.6% Hard 1500 Design a File Sharing System 46.4% Medium 1501 Countries You Can Safely Invest In 60.1% Medium 1502 Can Make Arithmetic Progression From Sequence 70.3% Easy 1503 Last Moment Before All Ants Fall Out of a Plank 53.7% Medium 1504 Count Submatrices With All Ones 60.6% Medium 1505 Minimum Possible Integer After at Most K Adjacent Swaps On Digits 36.5% Hard 1506 Find Root of N-Ary Tree 79.5% Medium 1507 Reformat Date 60.4% Easy 1508 Range Sum of Sorted Subarray Sums 59.8% Medium 1509 Minimum Difference Between Largest and Smallest Value in Three Moves 55.6% Medium 1510 Stone Game IV 59.2% Hard 1511 Customer Order Frequency 74.7% Easy 1512 Number of Good Pairs Go 87.6% Easy 1513 Number of Substrings With Only 1s 42.5% Medium 1514 Path with Maximum Probability 42.1% Medium 1515 Best Position for a Service Centre 39.4% Hard 1516 Move Sub-Tree of N-Ary Tree 64.6% Hard 1517 Find Users With Valid E-Mails 71.3% Easy 1518 Water Bottles 60.4% Easy 1519 Number of Nodes in the Sub-Tree With the Same Label 37.9% Medium 1520 Maximum Number of Non-Overlapping Substrings 36.9% Hard 1521 Find a Value of a Mysterious Function Closest to Target 44.0% Hard 1522 Diameter of N-Ary Tree 70.1% Medium 1523 Count Odd Numbers in an Interval Range 54.0% Easy 1524 Number of Sub-arrays With Odd Sum 40.8% Medium 1525 Number of Good Ways to Split a String 68.7% Medium 1526 Minimum Number of Increments on Subarrays to Form a Target Array 64.2% Hard 1527 Patients With a Condition 58.0% Easy 1528 Shuffle String 85.7% Easy 1529 Bulb Switcher IV 71.5% Medium 1530 Number of Good Leaf Nodes Pairs 57.4% Medium 1531 String Compression II 34.5% Hard 1532 The Most Recent Three Orders 72.0% Medium 1533 Find the Index of the Large Integer 54.2% Medium 1534 Count Good Triplets 80.3% Easy 1535 Find the Winner of an Array Game 48.1% Medium 1536 Minimum Swaps to Arrange a Binary Grid 44.1% Medium 1537 Get the Maximum Score 37.1% Hard 1538 Guess the Majority in a Hidden Array 61.5% Medium 1539 Kth Missing Positive Number Go 54.7% Easy 1540 Can Convert String in K Moves 31.7% Medium 1541 Minimum Insertions to Balance a Parentheses String 44.5% Medium 1542 Find Longest Awesome Substring 37.4% Hard 1543 Fix Product Name Format 65.6% Easy 1544 Make The String Great 55.7% Easy 1545 Find Kth Bit in Nth Binary String 58.0% Medium 1546 Maximum Number of Non-Overlapping Subarrays With Sum Equals Target 44.7% Medium 1547 Minimum Cost to Cut a Stick 53.5% Hard 1548 The Most Similar Path in a Graph 55.6% Hard 1549 The Most Recent Orders for Each Product 67.3% Medium 1550 Three Consecutive Odds 64.0% Easy 1551 Minimum Operations to Make Array Equal Go 80.5% Medium 1552 Magnetic Force Between Two Balls 50.6% Medium 1553 Minimum Number of Days to Eat N Oranges 30.9% Hard 1554 Strings Differ by One Character 64.6% Medium 1555 Bank Account Summary 53.3% Medium 1556 Thousand Separator 57.0% Easy 1557 Minimum Number of Vertices to Reach All Nodes 76.2% Medium 1558 Minimum Numbers of Function Calls to Make Target Array 63.4% Medium 1559 Detect Cycles in 2D Grid 45.1% Hard 1560 Most Visited Sector in a Circular Track 57.4% Easy 1561 Maximum Number of Coins You Can Get 77.1% Medium 1562 Find Latest Group of Size M 40.0% Medium 1563 Stone Game V 40.1% Hard 1564 Put Boxes Into the Warehouse I 64.2% Medium 1565 Unique Orders and Customers Per Month 82.9% Easy 1566 Detect Pattern of Length M Repeated K or More Times 43.0% Easy 1567 Maximum Length of Subarray With Positive Product 37.7% Medium 1568 Minimum Number of Days to Disconnect Island 50.1% Hard 1569 Number of Ways to Reorder Array to Get Same BST 50.1% Hard 1570 Dot Product of Two Sparse Vectors 91.0% Medium 1571 Warehouse Manager 89.7% Easy 1572 Matrix Diagonal Sum Go 78.0% Easy 1573 Number of Ways to Split a String Go 31.3% Medium 1574 Shortest Subarray to be Removed to Make Array Sorted 34.2% Medium 1575 Count All Possible Routes 57.5% Hard 1576 Replace All ?'s to Avoid Consecutive Repeating Characters 50.4% Easy 1577 Number of Ways Where Square of Number Is Equal to Product of Two Numbers 38.3% Medium 1578 Minimum Deletion Cost to Avoid Repeating Letters 61.0% Medium 1579 Remove Max Number of Edges to Keep Graph Fully Traversable Go 46.9% Hard 1580 Put Boxes Into the Warehouse II 63.5% Medium 1581 Customer Who Visited but Did Not Make Any Transactions 89.4% Easy 1582 Special Positions in a Binary Matrix 64.2% Easy 1583 Count Unhappy Friends 55.2% Medium 1584 Min Cost to Connect All Points 55.5% Medium 1585 Check If String Is Transformable With Substring Sort Operations 48.5% Hard 1586 Binary Search Tree Iterator II 66.7% Medium 1587 Bank Account Summary II 89.9% Easy 1588 Sum of All Odd Length Subarrays 81.8% Easy 1589 Maximum Sum Obtained of Any Permutation 35.5% Medium 1590 Make Sum Divisible by P 27.2% Medium 1591 Strange Printer II 55.6% Hard 1592 Rearrange Spaces Between Words 43.6% Easy 1593 Split a String Into the Max Number of Unique Substrings 50.7% Medium 1594 Maximum Non Negative Product in a Matrix 32.6% Medium 1595 Minimum Cost to Connect Two Groups of Points 44.0% Hard 1596 The Most Frequently Ordered Products for Each Customer 85.2% Medium 1597 Build Binary Expression Tree From Infix Expression 59.2% Hard 1598 Crawler Log Folder 63.8% Easy 1599 Maximum Profit of Operating a Centennial Wheel 43.7% Medium 1600 Throne Inheritance Go 61.4% Medium 1601 Maximum Number of Achievable Transfer Requests 48.3% Hard 1602 Find Nearest Right Node in Binary Tree 73.5% Medium 1603 Design Parking System Go 86.5% Easy 1604 Alert Using Same Key-Card Three or More Times in a One Hour Period 43.7% Medium 1605 Find Valid Matrix Given Row and Column Sums 77.6% Medium 1606 Find Servers That Handled Most Number of Requests 38.1% Hard 1607 Sellers With No Sales 55.2% Easy 1608 Special Array With X Elements Greater Than or Equal X Go 61.5% Easy 1609 Even Odd Tree 52.2% Medium 1610 Maximum Number of Visible Points 32.6% Hard 1611 Minimum One Bit Operations to Make Integers Zero 59.2% Hard 1612 Check If Two Expression Trees are Equivalent 70.1% Medium 1613 Find the Missing IDs 75.1% Medium 1614 Maximum Nesting Depth of the Parentheses Go 82.6% Easy 1615 Maximal Network Rank 54.1% Medium 1616 Split Two Strings to Make Palindrome 30.9% Medium 1617 Count Subtrees With Max Distance Between Cities 63.7% Hard 1618 Maximum Font to Fit a Sentence in a Screen 57.6% Medium 1619 Mean of Array After Removing Some Elements Go 64.5% Easy 1620 Coordinate With Maximum Network Quality 37.0% Medium 1621 Number of Sets of K Non-Overlapping Line Segments 41.9% Medium 1622 Fancy Sequence 14.7% Hard 1623 All Valid Triplets That Can Represent a Country 89.0% Easy 1624 Largest Substring Between Two Equal Characters Go 58.6% Easy 1625 Lexicographically Smallest String After Applying Operations 65.2% Medium 1626 Best Team With No Conflicts 39.4% Medium 1627 Graph Connectivity With Threshold 41.2% Hard 1628 Design an Expression Tree With Evaluate Function 80.9% Medium 1629 Slowest Key Go 59.0% Easy 1630 Arithmetic Subarrays 77.3% Medium 1631 Path With Minimum Effort Go 50.2% Medium 1632 Rank Transform of a Matrix 32.2% Hard 1633 Percentage of Users Attended a Contest 70.8% Easy 1634 Add Two Polynomials Represented as Linked Lists 52.4% Medium 1635 Hopper Company Queries I 56.5% Hard 1636 Sort Array by Increasing Frequency Go 67.2% Easy 1637 Widest Vertical Area Between Two Points Containing No Points 83.9% Medium 1638 Count Substrings That Differ by One Character 71.2% Medium 1639 Number of Ways to Form a Target String Given a Dictionary 40.4% Hard 1640 Check Array Formation Through Concatenation Go 55.5% Easy 1641 Count Sorted Vowel Strings Go 75.0% Medium 1642 Furthest Building You Can Reach Go 43.4% Medium 1643 Kth Smallest Instructions 45.5% Hard 1644 Lowest Common Ancestor of a Binary Tree II 56.8% Medium 1645 Hopper Company Queries II 39.1% Hard 1646 Get Maximum in Generated Array Go 52.7% Easy 1647 Minimum Deletions to Make Character Frequencies Unique Go 55.8% Medium 1648 Sell Diminishing-Valued Colored Balls Go 31.3% Medium 1649 Create Sorted Array through Instructions Go 36.9% Hard 1650 Lowest Common Ancestor of a Binary Tree III 76.9% Medium 1651 Hopper Company Queries III 67.2% Hard 1652 Defuse the Bomb Go 60.3% Easy 1653 Minimum Deletions to Make String Balanced Go 52.4% Medium 1654 Minimum Jumps to Reach Home Go 24.6% Medium 1655 Distribute Repeating Integers Go 40.3% Hard 1656 Design an Ordered Stream Go 82.3% Easy 1657 Determine if Two Strings Are Close Go 54.9% Medium 1658 Minimum Operations to Reduce X to Zero Go 33.3% Medium 1659 Maximize Grid Happiness Go 35.9% Hard 1660 Correct a Binary Tree 75.5% Medium 1661 Average Time of Process per Machine 79.7% Easy 1662 Check If Two String Arrays are Equivalent Go 82.0% Easy 1663 Smallest String With A Given Numeric Value Go 64.2% Medium 1664 Ways to Make a Fair Array Go 61.9% Medium 1665 Minimum Initial Energy to Finish Tasks Go 54.8% Hard 1666 Change the Root of a Binary Tree 69.3% Medium 1667 Fix Names in a Table 62.4% Easy 1668 Maximum Repeating Substring Go 38.7% Easy 1669 Merge In Between Linked Lists Go 75.1% Medium 1670 Design Front Middle Back Queue Go 54.4% Medium 1671 Minimum Number of Removals to Make Mountain Array 44.2% Hard 1672 Richest Customer Wealth Go 88.1% Easy 1673 Find the Most Competitive Subsequence Go 45.9% Medium 1674 Minimum Moves to Make Array Complementary Go 36.4% Medium 1675 Minimize Deviation in Array Go 48.1% Hard 1676 Lowest Common Ancestor of a Binary Tree IV 78.9% Medium 1677 Product's Worth Over Invoices 52.1% Easy 1678 Goal Parser Interpretation Go 84.9% Easy 1679 Max Number of K-Sum Pairs Go 53.5% Medium 1680 Concatenation of Consecutive Binary Numbers Go 52.2% Medium 1681 Minimum Incompatibility Go 35.9% Hard 1682 Longest Palindromic Subsequence II 50.9% Medium 1683 Invalid Tweets 90.8% Easy 1684 Count the Number of Consistent Strings Go 81.7% Easy 1685 Sum of Absolute Differences in a Sorted Array Go 63.5% Medium 1686 Stone Game VI 51.2% Medium 1687 Delivering Boxes from Storage to Ports 35.9% Hard 1688 Count of Matches in Tournament Go 81.8% Easy 1689 Partitioning Into Minimum Number Of Deci-Binary Numbers Go 88.2% Medium 1690 Stone Game VII Go 58.5% Medium 1691 Maximum Height by Stacking Cuboids Go 51.1% Hard 1692 Count Ways to Distribute Candies 60.0% Hard 1693 Daily Leads and Partners 90.8% Easy 1694 Reformat Phone Number Go 64.7% Easy 1695 Maximum Erasure Value Go 52.4% Medium 1696 Jump Game VI Go 42.1% Medium 1697 Checking Existence of Edge Length Limited Paths 47.9% Hard 1698 Number of Distinct Substrings in a String 60.5% Medium 1699 Number of Calls Between Two Persons 85.8% Medium 1700 Number of Students Unable to Eat Lunch Go 67.6% Easy 1701 Average Waiting Time 60.8% Medium 1702 Maximum Binary String After Change 43.8% Medium 1703 Minimum Adjacent Swaps for K Consecutive Ones 37.4% Hard 1704 Determine if String Halves Are Alike Go 78.6% Easy 1705 Maximum Number of Eaten Apples 34.5% Medium 1706 Where Will the Ball Fall 63.0% Medium 1707 Maximum XOR With an Element From Array 42.6% Hard 1708 Largest Subarray Length K 63.9% Easy 1709 Biggest Window Between Visits 80.9% Medium 1710 Maximum Units on a Truck Go 72.4% Easy 1711 Count Good Meals 27.0% Medium 1712 Ways to Split Array Into Three Subarrays 29.1% Medium 1713 Minimum Operations to Make a Subsequence 46.1% Hard 1714 Sum Of Special Evenly-Spaced Elements In Array 50.7% Hard 1715 Count Apples and Oranges 78.6% Medium 1716 Calculate Money in Leetcode Bank Go 64.1% Easy 1717 Maximum Score From Removing Substrings 41.9% Medium 1718 Construct the Lexicographically Largest Valid Sequence 48.7% Medium 1719 Number Of Ways To Reconstruct A Tree 39.8% Hard 1720 Decode XORed Array Go 85.5% Easy 1721 Swapping Nodes in a Linked List Go 66.4% Medium 1722 Minimize Hamming Distance After Swap Operations 46.1% Medium 1723 Find Minimum Time to Finish All Jobs 40.7% Hard 1724 Checking Existence of Edge Length Limited Paths II 57.1% Hard 1725 Number Of Rectangles That Can Form The Largest Square Go 78.4% Easy 1726 Tuple with Same Product 58.6% Medium 1727 Largest Submatrix With Rearrangements 59.4% Medium 1728 Cat and Mouse II 41.2% Hard 1729 Find Followers Count 70.5% Easy 1730 Shortest Path to Get Food 54.5% Medium 1731 The Number of Employees Which Report to Each Employee 49.2% Easy 1732 Find the Highest Altitude Go 79.2% Easy 1733 Minimum Number of People to Teach 38.6% Medium 1734 Decode XORed Permutation Go 56.9% Medium 1735 Count Ways to Make Array With Product 48.4% Hard 1736 Latest Time by Replacing Hidden Digits Go 41.4% Easy 1737 Change Minimum Characters to Satisfy One of Three Conditions 30.5% Medium 1738 Find Kth Largest XOR Coordinate Value Go 62.8% Medium 1739 Building Boxes 50.2% Hard 1740 Find Distance in a Binary Tree 69.1% Medium 1741 Find Total Time Spent by Each Employee 90.8% Easy 1742 Maximum Number of Balls in a Box Go 73.2% Easy 1743 Restore the Array From Adjacent Pairs 65.0% Medium 1744 Can You Eat Your Favorite Candy on Your Favorite Day? Go 31.4% Medium 1745 Palindrome Partitioning IV 49.6% Hard 1746 Maximum Subarray Sum After One Operation 61.8% Medium 1747 Leetflex Banned Accounts 68.7% Medium 1748 Sum of Unique Elements Go 74.6% Easy 1749 Maximum Absolute Sum of Any Subarray 53.7% Medium 1750 Minimum Length of String After Deleting Similar Ends 42.5% Medium 1751 Maximum Number of Events That Can Be Attended II 49.3% Hard 1752 Check if Array Is Sorted and Rotated Go 44.6% Easy 1753 Maximum Score From Removing Stones 63.0% Medium 1754 Largest Merge Of Two Strings 41.8% Medium 1755 Closest Subsequence Sum 34.4% Hard 1756 Design Most Recently Used Queue 78.4% Medium 1757 Recyclable and Low Fat Products 95.2% Easy 1758 Minimum Changes To Make Alternating Binary String Go 58.3% Easy 1759 Count Number of Homogenous Substrings 43.7% Medium 1760 Minimum Limit of Balls in a Bag 53.9% Medium 1761 Minimum Degree of a Connected Trio in a Graph 38.6% Hard 1762 Buildings With an Ocean View 81.4% Medium 1763 Longest Nice Substring 61.0% Easy 1764 Form Array by Concatenating Subarrays of Another Array 53.5% Medium 1765 Map of Highest Peak 57.2% Medium 1766 Tree of Coprimes 36.6% Hard 1767 Find the Subtasks That Did Not Execute 86.4% Hard 1768 Merge Strings Alternately 74.1% Easy 1769 Minimum Number of Operations to Move All Balls to Each Box 85.9% Medium 1770 Maximum Score from Performing Multiplication Operations 30.6% Medium 1771 Maximize Palindrome Length From Subsequences 34.4% Hard 1772 Sort Features by Popularity 65.5% Medium 1773 Count Items Matching a Rule 84.6% Easy 1774 Closest Dessert Cost 45.4% Medium 1775 Equal Sum Arrays With Minimum Number of Operations 50.6% Medium 1776 Car Fleet II 50.0% Hard 1777 Product's Price for Each Store 86.4% Easy 1778 Shortest Path in a Hidden Grid 44.7% Medium 1779 Find Nearest Point That Has the Same X or Y Coordinate 66.6% Easy 1780 Check if Number is a Sum of Powers of Three 63.2% Medium 1781 Sum of Beauty of All Substrings 58.5% Medium 1782 Count Pairs Of Nodes 35.0% Hard 1783 Grand Slam Titles 90.4% Medium 1784 Check if Binary String Has at Most One Segment of Ones 41.3% Easy 1785 Minimum Elements to Add to Form a Given Sum 40.0% Medium 1786 Number of Restricted Paths From First to Last Node 36.6% Medium 1787 Make the XOR of All Segments Equal to Zero 37.4% Hard 1788 Maximize the Beauty of the Garden 67.3% Hard 1789 Primary Department for Each Employee 79.5% Easy 1790 Check if One String Swap Can Make Strings Equal 44.4% Easy 1791 Find Center of Star Graph 84.3% Easy 1792 Maximum Average Pass Ratio 47.5% Medium 1793 Maximum Score of a Good Subarray 48.0% Hard 1794 Count Pairs of Equal Substrings With Minimum Difference 68.1% Medium 1795 Rearrange Products Table 89.8% Easy 1796 Second Largest Digit in a String 48.1% Easy 1797 Design Authentication Manager 50.2% Medium 1798 Maximum Number of Consecutive Values You Can Make 46.7% Medium 1799 Maximize Score After N Operations 45.1% Hard 1800 Maximum Ascending Subarray Sum 64.3% Easy 1801 Number of Orders in the Backlog 44.6% Medium 1802 Maximum Value at a Given Index in a Bounded Array 28.4% Medium 1803 Count Pairs With XOR in a Range 44.1% Hard 1804 Implement Trie II (Prefix Tree) 58.1% Medium 1805 Number of Different Integers in a String 34.7% Easy 1806 Minimum Number of Operations to Reinitialize a Permutation 70.6% Medium 1807 Evaluate the Bracket Pairs of a String 66.3% Medium 1808 Maximize Number of Nice Divisors 28.3% Hard 1809 Ad-Free Sessions 62.6% Easy 1810 Minimum Path Cost in a Hidden Grid 54.2% Medium 1811 Find Interview Candidates 66.9% Medium 1812 Determine Color of a Chessboard Square 77.2% Easy 1813 Sentence Similarity III 31.8% Medium 1814 Count Nice Pairs in an Array 39.3% Medium 1815 Maximum Number of Groups Getting Fresh Donuts 39.4% Hard 1816 Truncate Sentence 80.1% Easy 1817 Finding the Users Active Minutes 78.3% Medium 1818 Minimum Absolute Sum Difference 28.4% Medium 1819 Number of Different Subsequences GCDs 34.7% Hard 1820 Maximum Number of Accepted Invitations 47.3% Medium 1821 Find Customers With Positive Revenue this Year 89.5% Easy 1822 Sign of the Product of an Array 64.2% Easy 1823 Find the Winner of the Circular Game 72.3% Medium 1824 Minimum Sideway Jumps 47.6% Medium 1825 Finding MK Average 28.2% Hard 1826 Faulty Sensor 54.1% Easy 1827 Minimum Operations to Make the Array Increasing 77.7% Easy 1828 Queries on Number of Points Inside a Circle 86.6% Medium 1829 Maximum XOR for Each Query 73.7% Medium 1830 Minimum Number of Operations to Make String Sorted 46.6% Hard 1831 Maximum Transaction Each Day 84.9% Medium 1832 Check if the Sentence Is Pangram 82.3% Easy 1833 Maximum Ice Cream Bars 63.7% Medium 1834 Single-Threaded CPU 34.2% Medium 1835 Find XOR Sum of All Pairs Bitwise AND 56.6% Hard 1836 Remove Duplicates From an Unsorted Linked List 71.9% Medium 1837 Sum of Digits in Base K 74.9% Easy 1838 Frequency of the Most Frequent Element 33.0% Medium 1839 Longest Substring Of All Vowels in Order 47.1% Medium 1840 Maximum Building Height 34.4% Hard 1841 League Statistics 61.3% Medium 1842 Next Palindrome Using Same Digits 63.6% Hard 1843 Suspicious Bank Accounts 52.1% Medium 1844 Replace All Digits with Characters 80.0% Easy 1845 Seat Reservation Manager 55.6% Medium 1846 Maximum Element After Decreasing and Rearranging 54.7% Medium 1847 Closest Room 31.7% Hard 1848 Minimum Distance to the Target Element 59.8% Easy 1849 Splitting a String Into Descending Consecutive Values 27.6% Medium 1850 Minimum Adjacent Swaps to Reach the Kth Smallest Number 64.1% Medium 1851 Minimum Interval to Include Each Query 43.0% Hard 1852 Distinct Numbers in Each Subarray 76.1% Medium 1853 Convert Date Format 88.8% Easy 1854 Maximum Population Year 57.1% Easy 1855 Maximum Distance Between a Pair of Values 46.1% Medium 1856 Maximum Subarray Min-Product 33.6% Medium 1857 Largest Color Value in a Directed Graph 35.4% Hard 1858 Longest Word With All Prefixes 67.4% Medium 1859 Sorting the Sentence 82.5% Easy 1860 Incremental Memory Leak 69.4% Medium 1861 Rotating the Box 62.1% Medium 1862 Sum of Floored Pairs 27.0% Hard 1863 Sum of All Subset XOR Totals 77.8% Easy 1864 Minimum Number of Swaps to Make the Binary String Alternating 36.4% Medium 1865 Finding Pairs With a Certain Sum 45.8% Medium 1866 Number of Ways to Rearrange Sticks With K Sticks Visible 54.2% Hard 1867 Orders With Maximum Quantity Above Average 79.3% Medium 1868 Product of Two Run-Length Encoded Arrays 59.4% Medium 1869 Longer Contiguous Segments of Ones than Zeros 59.5% Easy 1870 Minimum Speed to Arrive on Time 32.4% Medium 1871 Jump Game VII 24.2% Medium 1872 Stone Game VIII 51.0% Hard 1873 Calculate Special Bonus 90.4% Easy 1874 Minimize Product Sum of Two Arrays 90.8% Medium 1875 Group Employees of the Same Salary 74.9% Medium 1876 Substrings of Size Three with Distinct Characters 68.0% Easy 1877 Minimize Maximum Pair Sum in Array 78.6% Medium 1878 Get Biggest Three Rhombus Sums in a Grid 43.3% Medium 1879 Minimum XOR Sum of Two Arrays 35.8% Hard 1880 Check if Word Equals Summation of Two Words 71.8% Easy 1881 Maximum Value after Insertion 33.7% Medium 1882 Process Tasks Using Servers 30.6% Medium 1883 Minimum Skips to Arrive at Meeting On Time 38.1% Hard 1884 Egg Drop With 2 Eggs and N Floors 70.1% Medium 1885 Count Pairs in Two Arrays 55.1% Medium 1886 Determine Whether Matrix Can Be Obtained By Rotation 54.0% Easy 1887 Reduction Operations to Make the Array Elements Equal 59.7% Medium 1888 Minimum Number of Flips to Make the Binary String Alternating 33.9% Medium 1889 Minimum Space Wasted From Packaging 29.2% Hard 1890 The Latest Login in 2020 85.7% Easy 1891 Cutting Ribbons 53.4% Medium 1892 Page Recommendations II 42.6% Hard 1893 Check if All the Integers in a Range Are Covered 49.2% Easy 1894 Find the Student that Will Replace the Chalk 38.6% Medium 1895 Largest Magic Square 49.3% Medium 1896 Minimum Cost to Change the Final Value of Expression 51.3% Hard 1897 Redistribute Characters to Make All Strings Equal 58.6% Easy 1898 Maximum Number of Removable Characters 32.4% Medium 1899 Merge Triplets to Form Target Triplet 59.0% Medium 1900 The Earliest and Latest Rounds Where Players Compete 48.8% Hard 1901 Find a Peak Element II 64.2% Medium 1902 Depth of BST Given Insertion Order 51.9% Medium 1903 Largest Odd Number in String 57.9% Easy 1904 The Number of Full Rounds You Have Played 52.2% Medium 1905 Count Sub Islands 60.0% Medium 1906 Minimum Absolute Difference Queries 41.5% Medium 1907 Count Salary Categories 59.6% Medium 1908 Game of Nim 67.3% Medium 1909 Remove One Element to Make the Array Strictly Increasing 30.6% Easy 1910 Remove All Occurrences of a Substring 70.9% Medium 1911 Maximum Alternating Subsequence Sum 55.6% Medium 1912 Design Movie Rental System 38.8% Hard 1913 Maximum Product Difference Between Two Pairs 85.3% Easy 1914 Cyclically Rotating a Grid 42.2% Medium 1915 Number of Wonderful Substrings 31.6% Medium 1916 Count Ways to Build Rooms in an Ant Colony 47.9% Hard 1917 Leetcodify Friends Recommendations 24.7% Medium ------------ ------------------------------------------------------- ------- ---------------- --------------- -------------