0001 Two Sum Go 45.6% Easy 0002 Add Two Numbers Go 33.9% Medium 0003 Longest Substring Without Repeating Characters Go 30.4% Medium 0004 Median of Two Sorted Arrays Go 29.6% Hard 0005 Longest Palindromic Substring 29.4% Medium 0006 ZigZag Conversion 36.3% Medium 0007 Reverse Integer Go 25.8% Easy 0008 String to Integer (atoi) 15.4% Medium 0009 Palindrome Number Go 48.4% Easy 0010 Regular Expression Matching 26.8% Hard 0011 Container With Most Water Go 50.8% Medium 0012 Integer to Roman 55.0% Medium 0013 Roman to Integer Go 55.7% Easy 0014 Longest Common Prefix 35.4% Easy 0015 3Sum Go 26.8% Medium 0016 3Sum Closest Go 46.0% Medium 0017 Letter Combinations of a Phone Number Go 46.8% Medium 0018 4Sum Go 33.6% Medium 0019 Remove Nth Node From End of List Go 35.2% Medium 0020 Valid Parentheses Go 38.9% Easy 0021 Merge Two Sorted Lists Go 53.5% Easy 0022 Generate Parentheses Go 62.6% Medium 0023 Merge k Sorted Lists Go 40.2% Hard 0024 Swap Nodes in Pairs Go 50.3% Medium 0025 Reverse Nodes in k-Group Go 42.0% Hard 0026 Remove Duplicates from Sorted Array Go 45.1% Easy 0027 Remove Element Go 48.2% Easy 0028 Implement strStr() Go 34.5% Easy 0029 Divide Two Integers Go 16.4% Medium 0030 Substring with Concatenation of All Words Go(是否还有更优解) 25.4% Hard 0031 Next Permutation 32.6% Medium 0032 Longest Valid Parentheses 28.4% Hard 0033 Search in Rotated Sorted Array Go 34.5% Medium 0034 Find First and Last Position of Element in Sorted Array Go 36.1% Medium 0035 Search Insert Position Go 42.6% Easy 0036 Valid Sudoku Go 48.7% Medium 0037 Sudoku Solver Go 43.5% Hard 0038 Count and Say 44.6% Easy 0039 Combination Sum Go 56.0% Medium 0040 Combination Sum II Go 48.1% Medium 0041 First Missing Positive Go 32.0% Hard 0042 Trapping Rain Water Go 48.8% Hard 0043 Multiply Strings 33.9% Medium 0044 Wildcard Matching 24.7% Hard 0045 Jump Game II 30.5% Hard 0046 Permutations Go 63.5% Medium 0047 Permutations II Go 46.4% Medium 0048 Rotate Image Go 56.6% Medium 0049 Group Anagrams Go 56.8% Medium 0050 Pow(x, n) Go 30.3% Medium 0051 N-Queens Go 46.6% Hard 0052 N-Queens II Go 57.8% Hard 0053 Maximum Subarray Go 46.5% Easy 0054 Spiral Matrix Go 34.1% Medium 0055 Jump Game Go 34.6% Medium 0056 Merge Intervals Go 39.3% Medium 0057 Insert Interval Go 33.5% Hard 0058 Length of Last Word 32.6% Easy 0059 Spiral Matrix II Go 53.8% Medium 0060 Permutation Sequence Go 38.4% Hard 0061 Rotate List Go 30.0% Medium 0062 Unique Paths Go 54.1% Medium 0063 Unique Paths II Go 34.5% Medium 0064 Minimum Path Sum Go 54.4% Medium 0065 Valid Number 15.3% Hard 0066 Plus One Go 43.0% Easy 0067 Add Binary Go 45.2% Easy 0068 Text Justification 27.7% Hard 0069 Sqrt(x) Go 33.9% Easy 0070 Climbing Stairs Go 47.8% Easy 0071 Simplify Path Go 32.6% Medium 0072 Edit Distance 44.8% Hard 0073 Set Matrix Zeroes 43.1% Medium 0074 Search a 2D Matrix Go 36.5% Medium 0075 Sort Colors Go 47.3% Medium 0076 Minimum Window Substring Go 34.6% Hard 0077 Combinations Go 54.7% Medium 0078 Subsets Go 61.9% Medium 0079 Word Search Go 35.6% Medium 0080 Remove Duplicates from Sorted Array II Go 43.9% Medium 0081 Search in Rotated Sorted Array II Go 33.0% Medium 0082 Remove Duplicates from Sorted List II Go 36.8% Medium 0083 Remove Duplicates from Sorted List Go 45.4% Easy 0084 Largest Rectangle in Histogram Go 35.1% Hard 0085 Maximal Rectangle 37.7% Hard 0086 Partition List Go 41.4% Medium 0087 Scramble String 33.7% Hard 0088 Merge Sorted Array Go 39.4% Easy 0089 Gray Code Go 49.1% Medium 0090 Subsets II Go 47.1% Medium 0091 Decode Ways Go 24.6% Medium 0092 Reverse Linked List II Go 38.8% Medium 0093 Restore IP Addresses Go 35.6% Medium 0094 Binary Tree Inorder Traversal Go 63.3% Medium 0095 Unique Binary Search Trees II Go 40.6% Medium 0096 Unique Binary Search Trees Go 52.9% Medium 0097 Interleaving String 31.5% Hard 0098 Validate Binary Search Tree Go 27.8% Medium 0099 Recover Binary Search Tree Go 39.6% Hard 0100 Same Tree Go 53.4% Easy 0101 Symmetric Tree Go 46.8% Easy 0102 Binary Tree Level Order Traversal Go 54.5% Medium 0103 Binary Tree Zigzag Level Order Traversal Go 48.3% Medium 0104 Maximum Depth of Binary Tree Go 66.0% Easy 0105 Construct Binary Tree from Preorder and Inorder Traversal Go 48.8% Medium 0106 Construct Binary Tree from Inorder and Postorder Traversal Go 47.1% Medium 0107 Binary Tree Level Order Traversal II Go 53.5% Easy 0108 Convert Sorted Array to Binary Search Tree Go 57.9% Easy 0109 Convert Sorted List to Binary Search Tree Go 47.6% Medium 0110 Balanced Binary Tree Go 43.5% Easy 0111 Minimum Depth of Binary Tree Go 37.4% Easy 0112 Path Sum Go 41.1% Easy 0113 Path Sum II Go 46.6% Medium 0114 Flatten Binary Tree to Linked List Go 49.2% Medium 0115 Distinct Subsequences 38.2% Hard 0116 Populating Next Right Pointers in Each Node 45.2% Medium 0117 Populating Next Right Pointers in Each Node II 39.1% Medium 0118 Pascal's Triangle 52.4% Easy 0119 Pascal's Triangle II 49.0% Easy 0120 Triangle Go 44.1% Medium 0121 Best Time to Buy and Sell Stock Go 50.4% Easy 0122 Best Time to Buy and Sell Stock II Go 56.9% Easy 0123 Best Time to Buy and Sell Stock III 37.4% Hard 0124 Binary Tree Maximum Path Sum Go 34.3% Hard 0125 Valid Palindrome Go 36.7% Easy 0126 Word Ladder II Go 22.1% Hard 0127 Word Ladder Go 29.5% Medium 0128 Longest Consecutive Sequence Go 45.1% Hard 0129 Sum Root to Leaf Numbers Go 49.0% Medium 0130 Surrounded Regions Go 28.1% Medium 0131 Palindrome Partitioning Go 47.5% Medium 0132 Palindrome Partitioning II 30.2% Hard 0133 Clone Graph 34.7% Medium 0134 Gas Station 38.5% Medium 0135 Candy 31.6% Hard 0136 Single Number Go 65.5% Easy 0137 Single Number II Go 52.4% Medium 0138 Copy List with Random Pointer 36.3% Medium 0139 Word Break 40.0% Medium 0140 Word Break II 32.6% Hard 0141 Linked List Cycle Go 41.1% Easy 0142 Linked List Cycle II Go 37.3% Medium 0143 Reorder List Go 37.0% Medium 0144 Binary Tree Preorder Traversal Go 55.6% Medium 0145 Binary Tree Postorder Traversal Go 54.9% Hard 0146 LRU Cache 33.1% Medium 0147 Insertion Sort List Go 41.1% Medium 0148 Sort List Go 42.3% Medium 0149 Max Points on a Line 16.9% Hard 0150 Evaluate Reverse Polish Notation Go 36.3% Medium 0151 Reverse Words in a String Go 21.9% Medium 0152 Maximum Product Subarray Go 31.7% Medium 0153 Find Minimum in Rotated Sorted Array Go 45.1% Medium 0154 Find Minimum in Rotated Sorted Array II Go 41.6% Hard 0155 Min Stack Go 44.4% Easy 0156 Binary Tree Upside Down 55.0% Medium 0157 Read N Characters Given Read4 34.2% Easy 0158 Read N Characters Given Read4 II - Call multiple times 33.7% Hard 0159 Longest Substring with At Most Two Distinct Characters 49.4% Medium 0160 Intersection of Two Linked Lists Go 40.5% Easy 0161 One Edit Distance 32.3% Medium 0162 Find Peak Element Go 43.3% Medium 0163 Missing Ranges 24.3% Medium 0164 Maximum Gap Go 35.4% Hard 0165 Compare Version Numbers 27.4% Medium 0166 Fraction to Recurring Decimal 21.6% Medium 0167 Two Sum II - Input array is sorted Go 54.0% Easy 0168 Excel Sheet Column Title Go 31.0% Easy 0169 Majority Element Go 58.7% Easy 0170 Two Sum III - Data structure design 33.5% Easy 0171 Excel Sheet Column Number Go 54.6% Easy 0172 Factorial Trailing Zeroes Go 37.8% Easy 0173 Binary Search Tree Iterator Go 56.5% Medium 0174 Dungeon Game Go 32.3% Hard 0175 Combine Two Tables 60.7% Easy 0176 Second Highest Salary 31.6% Easy 0177 Nth Highest Salary 31.3% Medium 0178 Rank Scores 45.8% Medium 0179 Largest Number Go 28.7% Medium 0180 Consecutive Numbers 39.7% Medium 0181 Employees Earning More Than Their Managers 56.8% Easy 0182 Duplicate Emails 62.0% Easy 0183 Customers Who Never Order 53.4% Easy 0184 Department Highest Salary 36.6% Medium 0185 Department Top Three Salaries 34.5% Hard 0186 Reverse Words in a String II 43.3% Medium 0187 Repeated DNA Sequences Go 38.9% Medium 0188 Best Time to Buy and Sell Stock IV 28.0% Hard 0189 Rotate Array 34.7% Easy 0190 Reverse Bits Go 39.7% Easy 0191 Number of 1 Bits Go 49.8% Easy 0192 Word Frequency 25.8% Medium 0193 Valid Phone Numbers 25.3% Easy 0194 Transpose File 24.1% Medium 0195 Tenth Line 33.0% Easy 0196 Delete Duplicate Emails 41.0% Easy 0197 Rising Temperature 38.4% Easy 0198 House Robber Go 42.0% Easy 0199 Binary Tree Right Side View Go 54.0% Medium 0200 Number of Islands Go 46.8% Medium 0201 Bitwise AND of Numbers Range Go 39.3% Medium 0202 Happy Number Go 50.4% Easy 0203 Remove Linked List Elements Go 38.6% Easy 0204 Count Primes Go 31.5% Easy 0205 Isomorphic Strings Go 39.8% Easy 0206 Reverse Linked List Go 62.5% Easy 0207 Course Schedule Go 43.1% Medium 0208 Implement Trie (Prefix Tree) Go 49.3% Medium 0209 Minimum Size Subarray Sum Go 38.1% Medium 0210 Course Schedule II Go 40.7% Medium 0211 Add and Search Word - Data structure design Go 38.1% Medium 0212 Word Search II Go 34.8% Hard 0213 House Robber II Go 36.5% Medium 0214 Shortest Palindrome 29.8% Hard 0215 Kth Largest Element in an Array Go 55.3% Medium 0216 Combination Sum III Go 56.5% Medium 0217 Contains Duplicate Go 56.0% Easy 0218 The Skyline Problem Go 34.5% Hard 0219 Contains Duplicate II Go 37.7% Easy 0220 Contains Duplicate III Go 20.9% Medium 0221 Maximal Square 37.7% Medium 0222 Count Complete Tree Nodes Go 46.7% Medium 0223 Rectangle Area Go 37.8% Medium 0224 Basic Calculator Go 36.8% Hard 0225 Implement Stack using Queues Go 45.1% Easy 0226 Invert Binary Tree Go 64.9% Easy 0227 Basic Calculator II 36.9% Medium 0228 Summary Ranges 39.5% Medium 0229 Majority Element II Go 35.6% Medium 0230 Kth Smallest Element in a BST Go 60.2% Medium 0231 Power of Two Go 43.7% Easy 0232 Implement Queue using Stacks Go 49.5% Easy 0233 Number of Digit One 31.3% Hard 0234 Palindrome Linked List Go 39.2% Easy 0235 Lowest Common Ancestor of a Binary Search Tree Go 49.9% Easy 0236 Lowest Common Ancestor of a Binary Tree Go 45.6% Medium 0237 Delete Node in a Linked List Go 63.7% Easy 0238 Product of Array Except Self 60.1% Medium 0239 Sliding Window Maximum Go 43.0% Hard 0240 Search a 2D Matrix II Go 43.1% Medium 0241 Different Ways to Add Parentheses 55.2% Medium 0242 Valid Anagram Go 56.8% Easy 0243 Shortest Word Distance 61.0% Easy 0244 Shortest Word Distance II 52.3% Medium 0245 Shortest Word Distance III 55.3% Medium 0246 Strobogrammatic Number 45.0% Easy 0247 Strobogrammatic Number II 47.6% Medium 0248 Strobogrammatic Number III 39.6% Hard 0249 Group Shifted Strings 55.0% Medium 0250 Count Univalue Subtrees 51.9% Medium 0251 Flatten 2D Vector 45.7% Medium 0252 Meeting Rooms 54.6% Easy 0253 Meeting Rooms II 45.7% Medium 0254 Factor Combinations 46.7% Medium 0255 Verify Preorder Sequence in Binary Search Tree 45.7% Medium 0256 Paint House 52.1% Easy 0257 Binary Tree Paths Go 51.4% Easy 0258 Add Digits Go 57.6% Easy 0259 3Sum Smaller 47.6% Medium 0260 Single Number III Go 64.3% Medium 0261 Graph Valid Tree 42.2% Medium 0262 Trips and Users 32.6% Hard 0263 Ugly Number Go 41.6% Easy 0264 Ugly Number II 42.0% Medium 0265 Paint House II 44.6% Hard 0266 Palindrome Permutation 61.9% Easy 0267 Palindrome Permutation II 36.4% Medium 0268 Missing Number Go 51.7% Easy 0269 Alien Dictionary 33.3% Hard 0270 Closest Binary Search Tree Value 48.1% Easy 0271 Encode and Decode Strings 31.5% Medium 0272 Closest Binary Search Tree Value II 50.5% Hard 0273 Integer to English Words 27.0% Hard 0274 H-Index Go 35.9% Medium 0275 H-Index II Go 35.9% Medium 0276 Paint Fence 38.3% Easy 0277 Find the Celebrity 41.8% Medium 0278 First Bad Version 35.7% Easy 0279 Perfect Squares 47.3% Medium 0280 Wiggle Sort 63.8% Medium 0281 Zigzag Iterator 58.4% Medium 0282 Expression Add Operators 35.5% Hard 0283 Move Zeroes Go 57.8% Easy 0284 Peeking Iterator 45.6% Medium 0285 Inorder Successor in BST 40.3% Medium 0286 Walls and Gates 54.5% Medium 0287 Find the Duplicate Number Go 55.5% Medium 0288 Unique Word Abbreviation 21.9% Medium 0289 Game of Life 54.4% Medium 0290 Word Pattern Go 37.0% Easy 0291 Word Pattern II 43.4% Hard 0292 Nim Game 54.9% Easy 0293 Flip Game 60.6% Easy 0294 Flip Game II 50.0% Medium 0295 Find Median from Data Stream 44.3% Hard 0296 Best Meeting Point 57.5% Hard 0297 Serialize and Deserialize Binary Tree 47.4% Hard 0298 Binary Tree Longest Consecutive Sequence 47.1% Medium 0299 Bulls and Cows 42.4% Easy 0300 Longest Increasing Subsequence Go 42.6% Medium 0301 Remove Invalid Parentheses 43.3% Hard 0302 Smallest Rectangle Enclosing Black Pixels 51.6% Hard 0303 Range Sum Query - Immutable Go 44.7% Easy 0304 Range Sum Query 2D - Immutable 38.5% Medium 0305 Number of Islands II 40.1% Hard 0306 Additive Number Go 29.3% Medium 0307 Range Sum Query - Mutable Go 34.6% Medium 0308 Range Sum Query 2D - Mutable 35.6% Hard 0309 Best Time to Buy and Sell Stock with Cooldown Go 47.4% Medium 0310 Minimum Height Trees 32.3% Medium 0311 Sparse Matrix Multiplication 61.8% Medium 0312 Burst Balloons 51.7% Hard 0313 Super Ugly Number 45.0% Medium 0314 Binary Tree Vertical Order Traversal 45.2% Medium 0315 Count of Smaller Numbers After Self Go 41.5% Hard 0316 Remove Duplicate Letters 35.8% Hard 0317 Shortest Distance from All Buildings 41.4% Hard 0318 Maximum Product of Word Lengths Go 51.2% Medium 0319 Bulb Switcher 45.4% Medium 0320 Generalized Abbreviation 52.0% Medium 0321 Create Maximum Number 27.0% Hard 0322 Coin Change Go 35.4% Medium 0323 Number of Connected Components in an Undirected Graph 56.0% Medium 0324 Wiggle Sort II Go 29.9% Medium 0325 Maximum Size Subarray Sum Equals k 46.8% Medium 0326 Power of Three Go 42.1% Easy 0327 Count of Range Sum Go 35.1% Hard 0328 Odd Even Linked List Go 55.7% Medium 0329 Longest Increasing Path in a Matrix Go 43.4% Hard 0330 Patching Array 34.5% Hard 0331 Verify Preorder Serialization of a Binary Tree Go 40.4% Medium 0332 Reconstruct Itinerary 36.7% Medium 0333 Largest BST Subtree 35.8% Medium 0334 Increasing Triplet Subsequence 40.0% Medium 0335 Self Crossing 28.0% Hard 0336 Palindrome Pairs 33.7% Hard 0337 House Robber III Go 50.6% Medium 0338 Counting Bits Go 69.5% Medium 0339 Nested List Weight Sum 73.9% Easy 0340 Longest Substring with At Most K Distinct Characters 44.0% Hard 0341 Flatten Nested List Iterator 52.9% Medium 0342 Power of Four Go 41.7% Easy 0343 Integer Break Go 50.4% Medium 0344 Reverse String Go 68.5% Easy 0345 Reverse Vowels of a String Go 44.2% Easy 0346 Moving Average from Data Stream 70.9% Easy 0347 Top K Frequent Elements Go 61.2% Medium 0348 Design Tic-Tac-Toe 54.3% Medium 0349 Intersection of Two Arrays Go 62.5% Easy 0350 Intersection of Two Arrays II Go 51.3% Easy 0351 Android Unlock Patterns 48.4% Medium 0352 Data Stream as Disjoint Intervals 47.3% Hard 0353 Design Snake Game 34.1% Medium 0354 Russian Doll Envelopes Go 35.6% Hard 0355 Design Twitter 30.3% Medium 0356 Line Reflection 31.8% Medium 0357 Count Numbers with Unique Digits Go 48.4% Medium 0358 Rearrange String k Distance Apart 34.9% Hard 0359 Logger Rate Limiter 70.8% Easy 0360 Sort Transformed Array 48.8% Medium 0361 Bomb Enemy 46.0% Medium 0362 Design Hit Counter 63.6% Medium 0363 Max Sum of Rectangle No Larger Than K 37.3% Hard 0364 Nested List Weight Sum II 62.7% Medium 0365 Water and Jug Problem 30.6% Medium 0366 Find Leaves of Binary Tree 70.6% Medium 0367 Valid Perfect Square Go 41.7% Easy 0368 Largest Divisible Subset 38.1% Medium 0369 Plus One Linked List 58.2% Medium 0370 Range Addition 62.8% Medium 0371 Sum of Two Integers Go 50.7% Medium 0372 Super Pow Go 36.4% Medium 0373 Find K Pairs with Smallest Sums Go 36.7% Medium 0374 Guess Number Higher or Lower 43.0% Easy 0375 Guess Number Higher or Lower II 40.3% Medium 0376 Wiggle Subsequence 39.6% Medium 0377 Combination Sum IV 45.3% Medium 0378 Kth Smallest Element in a Sorted Matrix Go 54.3% Medium 0379 Design Phone Directory 46.8% Medium 0380 Insert Delete GetRandom O(1) 47.5% Medium 0381 Insert Delete GetRandom O(1) - Duplicates allowed 34.1% Hard 0382 Linked List Random Node 52.1% Medium 0383 Ransom Note 53.1% Easy 0384 Shuffle an Array 52.8% Medium 0385 Mini Parser Go 33.8% Medium 0386 Lexicographical Numbers Go 51.6% Medium 0387 First Unique Character in a String Go 53.3% Easy 0388 Longest Absolute File Path 41.7% Medium 0389 Find the Difference Go 55.3% Easy 0390 Elimination Game 44.5% Medium 0391 Perfect Rectangle 30.4% Hard 0392 Is Subsequence Go 49.2% Easy 0393 UTF-8 Validation Go 37.5% Medium 0394 Decode String Go 49.9% Medium 0395 Longest Substring with At Least K Repeating Characters 41.4% Medium 0396 Rotate Function 36.3% Medium 0397 Integer Replacement Go 32.9% Medium 0398 Random Pick Index 55.9% Medium 0399 Evaluate Division Go 51.6% Medium 0400 Nth Digit 31.7% Medium 0401 Binary Watch Go 47.5% Easy 0402 Remove K Digits Go 28.4% Medium 0403 Frog Jump 39.7% Hard 0404 Sum of Left Leaves Go 50.9% Easy 0405 Convert a Number to Hexadecimal Go 43.9% Easy 0406 Queue Reconstruction by Height 66.8% Medium 0407 Trapping Rain Water II 42.4% Hard 0408 Valid Word Abbreviation 30.6% Easy 0409 Longest Palindrome Go 50.3% Easy 0410 Split Array Largest Sum Go 44.5% Hard 0411 Minimum Unique Word Abbreviation 36.3% Hard 0412 Fizz Buzz Go 62.3% Easy 0413 Arithmetic Slices 57.9% Medium 0414 Third Maximum Number Go 30.5% Easy 0415 Add Strings 47.5% Easy 0416 Partition Equal Subset Sum Go 43.7% Medium 0417 Pacific Atlantic Water Flow 41.1% Medium 0418 Sentence Screen Fitting 32.6% Medium 0419 Battleships in a Board 70.0% Medium 0420 Strong Password Checker 14.1% Hard 0421 Maximum XOR of Two Numbers in an Array Go 53.5% Medium 0422 Valid Word Square 37.7% Easy 0423 Reconstruct Original Digits from English 46.9% Medium 0424 Longest Repeating Character Replacement Go 47.0% Medium 0425 Word Squares 47.6% Hard 0426 Convert Binary Search Tree to Sorted Doubly Linked List 59.1% Medium 0427 Construct Quad Tree 61.4% Medium 0428 Serialize and Deserialize N-ary Tree 59.4% Hard 0429 N-ary Tree Level Order Traversal 65.0% Medium 0430 Flatten a Multilevel Doubly Linked List 55.1% Medium 0431 Encode N-ary Tree to Binary Tree 70.8% Hard 0432 All O`one Data Structure 32.4% Hard 0433 Minimum Genetic Mutation Go 41.8% Medium 0434 Number of Segments in a String 37.7% Easy 0435 Non-overlapping Intervals Go 42.9% Medium 0436 Find Right Interval Go 45.4% Medium 0437 Path Sum III Go 46.5% Medium 0438 Find All Anagrams in a String Go 43.3% Medium 0439 Ternary Expression Parser 55.9% Medium 0440 K-th Smallest in Lexicographical Order 29.1% Hard 0441 Arranging Coins Go 41.8% Easy 0442 Find All Duplicates in an Array 67.7% Medium 0443 String Compression 41.3% Easy 0444 Sequence Reconstruction 22.2% Medium 0445 Add Two Numbers II Go 54.5% Medium 0446 Arithmetic Slices II - Subsequence 32.7% Hard 0447 Number of Boomerangs Go 51.8% Easy 0448 Find All Numbers Disappeared in an Array Go 55.9% Easy 0449 Serialize and Deserialize BST 52.0% Medium 0450 Delete Node in a BST 43.1% Medium 0451 Sort Characters By Frequency Go 63.0% Medium 0452 Minimum Number of Arrows to Burst Balloons 49.6% Medium 0453 Minimum Moves to Equal Array Elements Go 50.2% Easy 0454 4Sum II Go 53.1% Medium 0455 Assign Cookies Go 49.9% Easy 0456 132 Pattern Go 28.9% Medium 0457 Circular Array Loop Go 29.4% Medium 0458 Poor Pigs 47.4% Hard 0459 Repeated Substring Pattern 42.2% Easy 0460 LFU Cache 34.2% Hard 0461 Hamming Distance Go 72.8% Easy 0462 Minimum Moves to Equal Array Elements II 53.8% Medium 0463 Island Perimeter Go 65.7% Easy 0464 Can I Win 28.8% Medium 0465 Optimal Account Balancing 46.8% Hard 0466 Count The Repetitions 28.2% Hard 0467 Unique Substrings in Wraparound String 35.6% Medium 0468 Validate IP Address 24.0% Medium 0469 Convex Polygon 37.0% Medium 0470 Implement Rand10() Using Rand7() Go 46.3% Medium 0471 Encode String with Shortest Length 47.1% Hard 0472 Concatenated Words 43.6% Hard 0473 Matchsticks to Square 37.7% Medium 0474 Ones and Zeroes Go 42.8% Medium 0475 Heaters Go 33.1% Easy 0476 Number Complement Go 64.8% Easy 0477 Total Hamming Distance Go 50.5% Medium 0478 Generate Random Point in a Circle 38.5% Medium 0479 Largest Palindrome Product 29.0% Hard 0480 Sliding Window Median Go 37.2% Hard 0481 Magical String 47.5% Medium 0482 License Key Formatting 43.1% Easy 0483 Smallest Good Base Go 35.7% Hard 0484 Find Permutation 60.5% Medium 0485 Max Consecutive Ones Go 54.7% Easy 0486 Predict the Winner 47.9% Medium 0487 Max Consecutive Ones II 48.5% Medium 0488 Zuma Game 39.8% Hard 0489 Robot Room Cleaner 69.7% Hard 0490 The Maze 51.4% Medium 0491 Increasing Subsequences Go 46.1% Medium 0492 Construct the Rectangle 49.6% Easy 0493 Reverse Pairs Go 25.2% Hard 0494 Target Sum Go 46.3% Medium 0495 Teemo Attacking 53.6% Medium 0496 Next Greater Element I Go 63.8% Easy 0497 Random Point in Non-overlapping Rectangles Go 37.8% Medium 0498 Diagonal Traverse Go 48.2% Medium 0499 The Maze III 41.0% Hard 0500 Keyboard Row Go 64.7% Easy 0501 Find Mode in Binary Search Tree 42.3% Easy 0502 IPO 40.4% Hard 0503 Next Greater Element II Go 56.5% Medium 0504 Base 7 46.2% Easy 0505 The Maze II 47.7% Medium 0506 Relative Ranks 50.5% Easy 0507 Perfect Number Go 35.5% Easy 0508 Most Frequent Subtree Sum Go 57.9% Medium 0509 Fibonacci Number Go 67.2% Easy 0510 Inorder Successor in BST II 58.0% Medium 0511 Game Play Analysis I 80.8% Easy 0512 Game Play Analysis II 55.5% Easy 0513 Find Bottom Left Tree Value Go 61.5% Medium 0514 Freedom Trail 43.0% Hard 0515 Find Largest Value in Each Tree Row Go 61.1% Medium 0516 Longest Palindromic Subsequence 53.2% Medium 0517 Super Washing Machines 38.3% Hard 0518 Coin Change 2 50.2% Medium 0519 Random Flip Matrix 36.7% Medium 0520 Detect Capital 54.4% Easy 0521 Longest Uncommon Subsequence I 57.6% Easy 0522 Longest Uncommon Subsequence II 34.0% Medium 0523 Continuous Subarray Sum 24.6% Medium 0524 Longest Word in Dictionary through Deleting Go 48.4% Medium 0525 Contiguous Array 42.8% Medium 0526 Beautiful Arrangement Go 57.8% Medium 0527 Word Abbreviation 54.2% Hard 0528 Random Pick with Weight Go 43.9% Medium 0529 Minesweeper Go 59.1% Medium 0530 Minimum Absolute Difference in BST 53.7% Easy 0531 Lonely Pixel I 59.0% Medium 0532 K-diff Pairs in an Array Go 31.5% Easy 0533 Lonely Pixel II 47.9% Medium 0534 Game Play Analysis III 75.9% Medium 0535 Encode and Decode TinyURL 79.9% Medium 0536 Construct Binary Tree from String 48.3% Medium 0537 Complex Number Multiplication Go 67.4% Medium 0538 Convert BST to Greater Tree 55.3% Easy 0539 Minimum Time Difference 51.5% Medium 0540 Single Element in a Sorted Array 57.9% Medium 0541 Reverse String II Go 48.4% Easy 0542 01 Matrix Go 39.8% Medium 0543 Diameter of Binary Tree 48.4% Easy 0544 Output Contest Matches 75.2% Medium 0545 Boundary of Binary Tree 38.9% Medium 0546 Remove Boxes 42.7% Hard 0547 Friend Circles Go 58.5% Medium 0548 Split Array with Equal Sum 46.4% Medium 0549 Binary Tree Longest Consecutive Sequence II 47.0% Medium 0550 Game Play Analysis IV 45.2% Medium 0551 Student Attendance Record I 46.0% Easy 0552 Student Attendance Record II 36.7% Hard 0553 Optimal Division 56.7% Medium 0554 Brick Wall 50.0% Medium 0555 Split Concatenated Strings 42.2% Medium 0556 Next Greater Element III 31.7% Medium 0557 Reverse Words in a String III Go 69.8% Easy 0558 Logical OR of Two Binary Grids Represented as Quad-Trees 44.6% Medium 0559 Maximum Depth of N-ary Tree 68.6% Easy 0560 Subarray Sum Equals K 43.8% Medium 0561 Array Partition I Go 72.0% Easy 0562 Longest Line of Consecutive One in Matrix 45.8% Medium 0563 Binary Tree Tilt Go 48.7% Easy 0564 Find the Closest Palindrome 19.7% Hard 0565 Array Nesting 55.5% Medium 0566 Reshape the Matrix Go 60.5% Easy 0567 Permutation in String Go 44.4% Medium 0568 Maximum Vacation Days 40.8% Hard 0569 Median Employee Salary 57.6% Hard 0570 Managers with at Least 5 Direct Reports 66.0% Medium 0571 Find Median Given Frequency of Numbers 44.7% Hard 0572 Subtree of Another Tree Go 44.1% Easy 0573 Squirrel Simulation 55.6% Medium 0574 Winning Candidate 47.5% Medium 0575 Distribute Candies Go 61.4% Easy 0576 Out of Boundary Paths 35.1% Medium 0577 Employee Bonus 68.1% Easy 0578 Get Highest Answer Rate Question 39.3% Medium 0579 Find Cumulative Salary of an Employee 37.0% Hard 0580 Count Student Number in Departments 48.7% Medium 0581 Shortest Unsorted Continuous Subarray 31.1% Easy 0582 Kill Process 60.8% Medium 0583 Delete Operation for Two Strings 48.6% Medium 0584 Find Customer Referee 72.2% Easy 0585 Investments in 2016 54.7% Medium 0586 Customer Placing the Largest Number of Orders 72.9% Easy 0587 Erect the Fence 35.9% Hard 0588 Design In-Memory File System 45.9% Hard 0589 N-ary Tree Preorder Traversal 72.0% Easy 0590 N-ary Tree Postorder Traversal 72.1% Easy 0591 Tag Validator 34.3% Hard 0592 Fraction Addition and Subtraction 49.0% Medium 0593 Valid Square 43.1% Medium 0594 Longest Harmonious Subsequence Go 46.6% Easy 0595 Big Countries 77.3% Easy 0596 Classes More Than 5 Students 38.0% Easy 0597 Friend Requests I: Overall Acceptance Rate 40.9% Easy 0598 Range Addition II Go 49.6% Easy 0599 Minimum Index Sum of Two Lists Go 50.7% Easy 0600 Non-negative Integers without Consecutive Ones 34.1% Hard 0601 Human Traffic of Stadium 41.6% Hard 0602 Friend Requests II: Who Has the Most Friends 53.3% Medium 0603 Consecutive Available Seats 63.9% Easy 0604 Design Compressed String Iterator 37.5% Easy 0605 Can Place Flowers 31.6% Easy 0606 Construct String from Binary Tree 54.1% Easy 0607 Sales Person 62.9% Easy 0608 Tree Node 67.0% Medium 0609 Find Duplicate File in System 59.5% Medium 0610 Triangle Judgement 65.9% Easy 0611 Valid Triangle Number 48.4% Medium 0612 Shortest Distance in a Plane 59.5% Medium 0613 Shortest Distance in a Line 77.5% Easy 0614 Second Degree Follower 30.2% Medium 0615 Average Salary: Departments VS Company 46.8% Hard 0616 Add Bold Tag in String 43.0% Medium 0617 Merge Two Binary Trees 74.1% Easy 0618 Students Report By Geography 54.8% Hard 0619 Biggest Single Number 43.1% Easy 0620 Not Boring Movies 67.5% Easy 0621 Task Scheduler 50.0% Medium 0622 Design Circular Queue 43.7% Medium 0623 Add One Row to Tree 49.7% Medium 0624 Maximum Distance in Arrays 38.9% Easy 0625 Minimum Factorization 32.8% Medium 0626 Exchange Seats 62.2% Medium 0627 Swap Salary 75.2% Easy 0628 Maximum Product of Three Numbers Go 47.1% Easy 0629 K Inverse Pairs Array 31.1% Hard 0630 Course Schedule III 33.5% Hard 0631 Design Excel Sum Formula 31.5% Hard 0632 Smallest Range Covering Elements from K Lists Go 52.4% Hard 0633 Sum of Square Numbers Go 32.2% Easy 0634 Find the Derangement of An Array 40.1% Medium 0635 Design Log Storage System 58.6% Medium 0636 Exclusive Time of Functions Go 52.0% Medium 0637 Average of Levels in Binary Tree Go 63.0% Easy 0638 Shopping Offers Go 51.5% Medium 0639 Decode Ways II 26.6% Hard 0640 Solve the Equation 42.0% Medium 0641 Design Circular Deque 52.7% Medium 0642 Design Search Autocomplete System 44.6% Hard 0643 Maximum Average Subarray I 41.5% Easy 0644 Maximum Average Subarray II 32.0% Hard 0645 Set Mismatch Go 42.1% Easy 0646 Maximum Length of Pair Chain 51.8% Medium 0647 Palindromic Substrings 60.6% Medium 0648 Replace Words Go 56.5% Medium 0649 Dota2 Senate 39.2% Medium 0650 2 Keys Keyboard 49.2% Medium 0651 4 Keys Keyboard 52.4% Medium 0652 Find Duplicate Subtrees 50.1% Medium 0653 Two Sum IV - Input is a BST Go 55.5% Easy 0654 Maximum Binary Tree 79.9% Medium 0655 Print Binary Tree 55.0% Medium 0656 Coin Path 29.0% Hard 0657 Robot Return to Origin 73.5% Easy 0658 Find K Closest Elements Go 40.9% Medium 0659 Split Array into Consecutive Subsequences 43.7% Medium 0660 Remove 9 53.3% Hard 0661 Image Smoother Go 51.5% Easy 0662 Maximum Width of Binary Tree Go 41.1% Medium 0663 Equal Tree Partition 39.5% Medium 0664 Strange Printer 40.2% Hard 0665 Non-decreasing Array 19.5% Easy 0666 Path Sum IV 54.7% Medium 0667 Beautiful Arrangement II 54.2% Medium 0668 Kth Smallest Number in Multiplication Table Go 45.6% Hard 0669 Trim a Binary Search Tree 63.0% Easy 0670 Maximum Swap 43.6% Medium 0671 Second Minimum Node In a Binary Tree 42.7% Easy 0672 Bulb Switcher II 50.9% Medium 0673 Number of Longest Increasing Subsequence 35.7% Medium 0674 Longest Continuous Increasing Subsequence 45.9% Easy 0675 Cut Off Trees for Golf Event 34.6% Hard 0676 Implement Magic Dictionary Go 54.5% Medium 0677 Map Sum Pairs 53.5% Medium 0678 Valid Parenthesis String 31.0% Medium 0679 24 Game 46.4% Hard 0680 Valid Palindrome II 36.6% Easy 0681 Next Closest Time 45.0% Medium 0682 Baseball Game Go 63.7% Easy 0683 K Empty Slots 35.7% Hard 0684 Redundant Connection Go 57.3% Medium 0685 Redundant Connection II Go 32.4% Hard 0686 Repeated String Match 32.3% Easy 0687 Longest Univalue Path 36.2% Easy 0688 Knight Probability in Chessboard 48.9% Medium 0689 Maximum Sum of 3 Non-Overlapping Subarrays 46.3% Hard 0690 Employee Importance 57.3% Easy 0691 Stickers to Spell Word 43.0% Hard 0692 Top K Frequent Words 51.8% Medium 0693 Binary Number with Alternating Bits Go 59.4% Easy 0694 Number of Distinct Islands 56.0% Medium 0695 Max Area of Island Go 62.7% Medium 0696 Count Binary Substrings 56.0% Easy 0697 Degree of an Array Go 53.8% Easy 0698 Partition to K Equal Sum Subsets 44.9% Medium 0699 Falling Squares Go 41.8% Hard 0700 Search in a Binary Search Tree 73.1% Easy 0701 Insert into a Binary Search Tree 77.8% Medium 0702 Search in a Sorted Array of Unknown Size 66.7% Medium 0703 Kth Largest Element in a Stream 49.7% Easy 0704 Binary Search Go 52.1% Easy 0705 Design HashSet Go 64.3% Easy 0706 Design HashMap Go 61.3% Easy 0707 Design Linked List Go 24.5% Medium 0708 Insert into a Sorted Circular Linked List 31.6% Medium 0709 To Lower Case 79.3% Easy 0710 Random Pick with Blacklist Go 32.4% Hard 0711 Number of Distinct Islands II 47.3% Hard 0712 Minimum ASCII Delete Sum for Two Strings 58.5% Medium 0713 Subarray Product Less Than K Go 39.1% Medium 0714 Best Time to Buy and Sell Stock with Transaction Fee Go 54.7% Medium 0715 Range Module Go 38.5% Hard 0716 Max Stack 42.6% Easy 0717 1-bit and 2-bit Characters Go 48.8% Easy 0718 Maximum Length of Repeated Subarray Go 49.3% Medium 0719 Find K-th Smallest Pair Distance Go 31.5% Hard 0720 Longest Word in Dictionary Go 48.2% Easy 0721 Accounts Merge Go 48.7% Medium 0722 Remove Comments 34.6% Medium 0723 Candy Crush 69.3% Medium 0724 Find Pivot Index 44.0% Easy 0725 Split Linked List in Parts Go 52.1% Medium 0726 Number of Atoms Go 48.9% Hard 0727 Minimum Window Subsequence 41.8% Hard 0728 Self Dividing Numbers 74.3% Easy 0729 My Calendar I Go 51.8% Medium 0730 Count Different Palindromic Subsequences 41.7% Hard 0731 My Calendar II 49.1% Medium 0732 My Calendar III Go 59.9% Hard 0733 Flood Fill Go 55.3% Easy 0734 Sentence Similarity 42.1% Easy 0735 Asteroid Collision Go 41.1% Medium 0736 Parse Lisp Expression 47.5% Hard 0737 Sentence Similarity II 45.8% Medium 0738 Monotone Increasing Digits 44.3% Medium 0739 Daily Temperatures Go 63.3% Medium 0740 Delete and Earn 48.6% Medium 0741 Cherry Pickup 33.9% Hard 0742 Closest Leaf in a Binary Tree 43.5% Medium 0743 Network Delay Time 44.9% Medium 0744 Find Smallest Letter Greater Than Target Go 45.4% Easy 0745 Prefix and Suffix Search Go 34.1% Hard 0746 Min Cost Climbing Stairs Go 50.3% Easy 0747 Largest Number At Least Twice of Others 42.0% Easy 0748 Shortest Completing Word Go 56.7% Easy 0749 Contain Virus 44.5% Hard 0750 Number Of Corner Rectangles 66.4% Medium 0751 IP to CIDR 61.8% Medium 0752 Open the Lock 51.8% Medium 0753 Cracking the Safe Go 50.5% Hard 0754 Reach a Number 34.7% Medium 0755 Pour Water 43.3% Medium 0756 Pyramid Transition Matrix Go 54.6% Medium 0757 Set Intersection Size At Least Two 40.1% Hard 0758 Bold Words in String 45.9% Easy 0759 Employee Free Time 66.2% Hard 0760 Find Anagram Mappings 81.1% Easy 0761 Special Binary String 54.7% Hard 0762 Prime Number of Set Bits in Binary Representation Go 63.2% Easy 0763 Partition Labels Go 76.0% Medium 0764 Largest Plus Sign 46.0% Medium 0765 Couples Holding Hands Go 54.3% Hard 0766 Toeplitz Matrix Go 65.0% Easy 0767 Reorganize String Go 48.7% Medium 0768 Max Chunks To Make Sorted II 48.7% Hard 0769 Max Chunks To Make Sorted 54.7% Medium 0770 Basic Calculator IV 47.9% Hard 0771 Jewels and Stones Go 86.3% Easy 0772 Basic Calculator III 41.2% Hard 0773 Sliding Puzzle 59.3% Hard 0774 Minimize Max Distance to Gas Station 46.9% Hard 0775 Global and Local Inversions 42.1% Medium 0776 Split BST 55.8% Medium 0777 Swap Adjacent in LR String 34.8% Medium 0778 Swim in Rising Water Go 53.0% Hard 0779 K-th Symbol in Grammar 37.2% Medium 0780 Reaching Points 29.3% Hard 0781 Rabbits in Forest Go 54.5% Medium 0782 Transform to Chessboard 42.8% Hard 0783 Minimum Distance Between BST Nodes 52.6% Easy 0784 Letter Case Permutation Go 64.6% Medium 0785 Is Graph Bipartite? 47.5% Medium 0786 K-th Smallest Prime Fraction Go 41.0% Hard 0787 Cheapest Flights Within K Stops 39.3% Medium 0788 Rotated Digits 57.1% Easy 0789 Escape The Ghosts 57.4% Medium 0790 Domino and Tromino Tiling 39.2% Medium 0791 Custom Sort String 65.7% Medium 0792 Number of Matching Subsequences 47.4% Medium 0793 Preimage Size of Factorial Zeroes Function Go 40.2% Hard 0794 Valid Tic-Tac-Toe State 32.6% Medium 0795 Number of Subarrays with Bounded Maximum 46.3% Medium 0796 Rotate String 49.6% Easy 0797 All Paths From Source to Target 77.9% Medium 0798 Smallest Rotation with Highest Score 44.1% Hard 0799 Champagne Tower 35.7% Medium 0800 Similar RGB Color 61.4% Easy 0801 Minimum Swaps To Make Sequences Increasing 38.9% Medium 0802 Find Eventual Safe States Go 48.9% Medium 0803 Bricks Falling When Hit Go 30.8% Hard 0804 Unique Morse Code Words 77.0% Easy 0805 Split Array With Same Average 26.3% Hard 0806 Number of Lines To Write String 64.9% Easy 0807 Max Increase to Keep City Skyline 83.7% Medium 0808 Soup Servings 39.9% Medium 0809 Expressive Words 47.0% Medium 0810 Chalkboard XOR Game 48.2% Hard 0811 Subdomain Visit Count Go 69.8% Easy 0812 Largest Triangle Area Go 58.3% Easy 0813 Largest Sum of Averages 49.9% Medium 0814 Binary Tree Pruning 74.5% Medium 0815 Bus Routes Go 42.6% Hard 0816 Ambiguous Coordinates 47.2% Medium 0817 Linked List Components Go 57.3% Medium 0818 Race Car 39.0% Hard 0819 Most Common Word Go 44.8% Easy 0820 Short Encoding of Words 50.7% Medium 0821 Shortest Distance to a Character 66.9% Easy 0822 Card Flipping Game 42.9% Medium 0823 Binary Trees With Factors 35.8% Medium 0824 Goat Latin 63.3% Easy 0825 Friends Of Appropriate Ages 42.6% Medium 0826 Most Profit Assigning Work Go 38.5% Medium 0827 Making A Large Island 45.6% Hard 0828 Count Unique Characters of All Substrings of a Given String Go 45.1% Hard 0829 Consecutive Numbers Sum 37.4% Hard 0830 Positions of Large Groups 49.6% Easy 0831 Masking Personal Information 44.1% Medium 0832 Flipping an Image Go 76.2% Easy 0833 Find And Replace in String 50.4% Medium 0834 Sum of Distances in Tree Go 43.7% Hard 0835 Image Overlap 58.5% Medium 0836 Rectangle Overlap Go 48.6% Easy 0837 New 21 Game 34.6% Medium 0838 Push Dominoes Go 48.4% Medium 0839 Similar String Groups Go 38.6% Hard 0840 Magic Squares In Grid 37.3% Easy 0841 Keys and Rooms Go 64.3% Medium 0842 Split Array into Fibonacci Sequence Go 36.3% Medium 0843 Guess the Word 46.1% Hard 0844 Backspace String Compare Go 46.4% Easy 0845 Longest Mountain in Array Go 37.2% Medium 0846 Hand of Straights 54.2% Medium 0847 Shortest Path Visiting All Nodes 52.0% Hard 0848 Shifting Letters 44.6% Medium 0849 Maximize Distance to Closest Person 42.6% Easy 0850 Rectangle Area II Go 47.5% Hard 0851 Loud and Rich Go 51.6% Medium 0852 Peak Index in a Mountain Array Go 71.6% Easy 0853 Car Fleet Go 42.4% Medium 0854 K-Similar Strings 38.2% Hard 0855 Exam Room 43.1% Medium 0856 Score of Parentheses Go 60.5% Medium 0857 Minimum Cost to Hire K Workers 49.6% Hard 0858 Mirror Reflection 53.7% Medium 0859 Buddy Strings 27.4% Easy 0860 Lemonade Change 51.6% Easy 0861 Score After Flipping Matrix 72.8% Medium 0862 Shortest Subarray with Sum at Least K Go 24.6% Hard 0863 All Nodes Distance K in Binary Tree Go 55.3% Medium 0864 Shortest Path to Get All Keys Go 40.1% Hard 0865 Smallest Subtree with all the Deepest Nodes 60.8% Medium 0866 Prime Palindrome 24.9% Medium 0867 Transpose Matrix Go 62.8% Easy 0868 Binary Gap 60.6% Easy 0869 Reordered Power of 2 53.3% Medium 0870 Advantage Shuffle 45.6% Medium 0871 Minimum Number of Refueling Stops 31.4% Hard 0872 Leaf-Similar Trees Go 64.5% Easy 0873 Length of Longest Fibonacci Subsequence 48.0% Medium 0874 Walking Robot Simulation 35.3% Easy 0875 Koko Eating Bananas Go 52.1% Medium 0876 Middle of the Linked List Go 68.4% Easy 0877 Stone Game 64.8% Medium 0878 Nth Magical Number Go 28.4% Hard 0879 Profitable Schemes 39.7% Hard 0880 Decoded String at Index Go 24.3% Medium 0881 Boats to Save People Go 46.8% Medium 0882 Reachable Nodes In Subdivided Graph 41.3% Hard 0883 Projection Area of 3D Shapes 67.7% Easy 0884 Uncommon Words from Two Sentences Go 63.3% Easy 0885 Spiral Matrix III Go 69.3% Medium 0886 Possible Bipartition 44.1% Medium 0887 Super Egg Drop Go 27.0% Hard 0888 Fair Candy Swap Go 58.3% Easy 0889 Construct Binary Tree from Preorder and Postorder Traversal 66.1% Medium 0890 Find and Replace Pattern 73.4% Medium 0891 Sum of Subsequence Widths Go 31.9% Hard 0892 Surface Area of 3D Shapes Go 58.9% Easy 0893 Groups of Special-Equivalent Strings 66.5% Easy 0894 All Possible Full Binary Trees 75.2% Medium 0895 Maximum Frequency Stack Go 60.6% Hard 0896 Monotonic Array Go 57.9% Easy 0897 Increasing Order Search Tree Go 70.7% Easy 0898 Bitwise ORs of Subarrays Go 34.8% Medium 0899 Orderly Queue 52.2% Hard 0900 RLE Iterator 53.5% Medium 0901 Online Stock Span Go 60.1% Medium 0902 Numbers At Most N Given Digit Set 31.5% Hard 0903 Valid Permutations for DI Sequence 49.6% Hard 0904 Fruit Into Baskets Go 42.5% Medium 0905 Sort Array By Parity 74.0% Easy 0906 Super Palindromes 32.7% Hard 0907 Sum of Subarray Minimums Go 32.3% Medium 0908 Smallest Range I 65.8% Easy 0909 Snakes and Ladders 38.4% Medium 0910 Smallest Range II 26.6% Medium 0911 Online Election Go 50.4% Medium 0912 Sort an Array 63.8% Medium 0913 Cat and Mouse 31.3% Hard 0914 X of a Kind in a Deck of Cards Go 34.9% Easy 0915 Partition Array into Disjoint Intervals 45.3% Medium 0916 Word Subsets 47.8% Medium 0917 Reverse Only Letters 57.9% Easy 0918 Maximum Sum Circular Subarray Go 33.6% Medium 0919 Complete Binary Tree Inserter 57.3% Medium 0920 Number of Music Playlists Go 46.5% Hard 0921 Minimum Add to Make Parentheses Valid Go 73.6% Medium 0922 Sort Array By Parity II Go 69.2% Easy 0923 3Sum With Multiplicity Go 35.7% Medium 0924 Minimize Malware Spread Go 42.0% Hard 0925 Long Pressed Name Go 40.6% Easy 0926 Flip String to Monotone Increasing 52.3% Medium 0927 Three Equal Parts Go 33.6% Hard 0928 Minimize Malware Spread II Go 40.5% Hard 0929 Unique Email Addresses 67.4% Easy 0930 Binary Subarrays With Sum Go 43.0% Medium 0931 Minimum Falling Path Sum 62.4% Medium 0932 Beautiful Array 58.3% Medium 0933 Number of Recent Calls Go 71.9% Easy 0934 Shortest Bridge 48.1% Medium 0935 Knight Dialer 45.1% Medium 0936 Stamping The Sequence 42.8% Hard 0937 Reorder Data in Log Files 54.4% Easy 0938 Range Sum of BST 81.3% Easy 0939 Minimum Area Rectangle 51.8% Medium 0940 Distinct Subsequences II 41.4% Hard 0941 Valid Mountain Array 33.3% Easy 0942 DI String Match Go 72.6% Easy 0943 Find the Shortest Superstring 42.8% Hard 0944 Delete Columns to Make Sorted 70.3% Easy 0945 Minimum Increment to Make Array Unique 46.3% Medium 0946 Validate Stack Sequences Go 61.8% Medium 0947 Most Stones Removed with Same Row or Column Go 55.3% Medium 0948 Bag of Tokens 40.8% Medium 0949 Largest Time for Given Digits Go 35.9% Easy 0950 Reveal Cards In Increasing Order 74.6% Medium 0951 Flip Equivalent Binary Trees 65.7% Medium 0952 Largest Component Size by Common Factor Go 30.3% Hard 0953 Verifying an Alien Dictionary Go 54.1% Easy 0954 Array of Doubled Pairs 35.6% Medium 0955 Delete Columns to Make Sorted II 33.2% Medium 0956 Tallest Billboard 39.7% Hard 0957 Prison Cells After N Days 40.7% Medium 0958 Check Completeness of a Binary Tree 52.0% Medium 0959 Regions Cut By Slashes Go 66.1% Medium 0960 Delete Columns to Make Sorted III 53.6% Hard 0961 N-Repeated Element in Size 2N Array Go 73.7% Easy 0962 Maximum Width Ramp 45.3% Medium 0963 Minimum Area Rectangle II 50.8% Medium 0964 Least Operators to Express Number 43.7% Hard 0965 Univalued Binary Tree 67.7% Easy 0966 Vowel Spellchecker 47.2% Medium 0967 Numbers With Same Consecutive Differences 39.4% Medium 0968 Binary Tree Cameras Go 37.5% Hard 0969 Pancake Sorting Go 67.5% Medium 0970 Powerful Integers Go 39.8% Easy 0971 Flip Binary Tree To Match Preorder Traversal 45.6% Medium 0972 Equal Rational Numbers 41.6% Hard 0973 K Closest Points to Origin Go 63.8% Medium 0974 Subarray Sums Divisible by K 48.9% Medium 0975 Odd Even Jump 42.3% Hard 0976 Largest Perimeter Triangle Go 57.6% Easy 0977 Squares of a Sorted Array Go 72.2% Easy 0978 Longest Turbulent Subarray Go 46.6% Medium 0979 Distribute Coins in Binary Tree Go 68.8% Medium 0980 Unique Paths III Go 73.3% Hard 0981 Time Based Key-Value Store Go 53.1% Medium 0982 Triples with Bitwise AND Equal To Zero 55.5% Hard 0983 Minimum Cost For Tickets 60.5% Medium 0984 String Without AAA or BBB Go 37.7% Medium 0985 Sum of Even Numbers After Queries Go 61.3% Easy 0986 Interval List Intersections Go 67.3% Medium 0987 Vertical Order Traversal of a Binary Tree 36.6% Medium 0988 Smallest String Starting From Leaf 46.0% Medium 0989 Add to Array-Form of Integer 44.2% Easy 0990 Satisfiability of Equality Equations Go 44.9% Medium 0991 Broken Calculator 45.5% Medium 0992 Subarrays with K Different Integers Go 48.6% Hard 0993 Cousins in Binary Tree Go 52.0% Easy 0994 Rotting Oranges 47.8% Medium 0995 Minimum Number of K Consecutive Bit Flips Go 46.8% Hard 0996 Number of Squareful Arrays Go 47.9% Hard 0997 Find the Town Judge 50.1% Easy 0998 Maximum Binary Tree II 62.9% Medium 0999 Available Captures for Rook Go 66.7% Easy 1000 Minimum Cost to Merge Stones 39.6% Hard 1001 Grid Illumination 35.9% Hard 1002 Find Common Characters Go 67.7% Easy 1003 Check If Word Is Valid After Substitutions Go 55.3% Medium 1004 Max Consecutive Ones III Go 59.1% Medium 1005 Maximize Sum Of Array After K Negations Go 51.3% Easy 1006 Clumsy Factorial 53.3% Medium 1007 Minimum Domino Rotations For Equal Row 50.0% Medium 1008 Construct Binary Search Tree from Preorder Traversal 78.4% Medium 1009 Complement of Base 10 Integer 59.6% Easy 1010 Pairs of Songs With Total Durations Divisible by 60 47.4% Easy 1011 Capacity To Ship Packages Within D Days Go 58.1% Medium 1012 Numbers With Repeated Digits 37.5% Hard 1013 Partition Array Into Three Parts With Equal Sum 51.8% Easy 1014 Best Sightseeing Pair 52.5% Medium 1015 Smallest Integer Divisible by K 32.1% Medium 1016 Binary String With Substrings Representing 1 To N 58.9% Medium 1017 Convert to Base -2 Go 59.0% Medium 1018 Binary Prefix Divisible By 5 47.7% Easy 1019 Next Greater Node In Linked List Go 57.4% Medium 1020 Number of Enclaves Go 57.7% Medium 1021 Remove Outermost Parentheses Go 77.9% Easy 1022 Sum of Root To Leaf Binary Numbers 67.2% Easy 1023 Camelcase Matching 57.0% Medium 1024 Video Stitching 49.2% Medium 1025 Divisor Game Go 66.3% Easy 1026 Maximum Difference Between Node and Ancestor Go 65.9% Medium 1027 Longest Arithmetic Sequence 53.5% Medium 1028 Recover a Tree From Preorder Traversal Go 69.9% Hard 1029 Two City Scheduling 56.1% Easy 1030 Matrix Cells in Distance Order Go 65.7% Easy 1031 Maximum Sum of Two Non-Overlapping Subarrays 57.8% Medium 1032 Stream of Characters 48.3% Hard 1033 Moving Stones Until Consecutive 41.7% Easy 1034 Coloring A Border 44.7% Medium 1035 Uncrossed Lines 56.1% Medium 1036 Escape a Large Maze 35.4% Hard 1037 Valid Boomerang Go 37.9% Easy 1038 Binary Search Tree to Greater Sum Tree 80.8% Medium 1039 Minimum Score Triangulation of Polygon 49.1% Medium 1040 Moving Stones Until Consecutive II Go 52.9% Medium 1041 Robot Bounded In Circle 49.5% Medium 1042 Flower Planting With No Adjacent 48.5% Easy 1043 Partition Array for Maximum Sum 65.1% Medium 1044 Longest Duplicate Substring 32.0% Hard 1045 Customers Who Bought All Products 67.8% Medium 1046 Last Stone Weight 62.2% Easy 1047 Remove All Adjacent Duplicates In String Go 68.5% Easy 1048 Longest String Chain 54.7% Medium 1049 Last Stone Weight II Go 44.1% Medium 1050 Actors and Directors Who Cooperated At Least Three Times 71.7% Easy 1051 Height Checker Go 71.1% Easy 1052 Grumpy Bookstore Owner Go 55.4% Medium 1053 Previous Permutation With One Swap 48.5% Medium 1054 Distant Barcodes Go 43.2% Medium 1055 Shortest Way to Form String 56.9% Medium 1056 Confusing Number 48.7% Easy 1057 Campus Bikes 57.7% Medium 1058 Minimize Rounding Error to Meet Target 41.7% Medium 1059 All Paths from Source Lead to Destination 44.7% Medium 1060 Missing Element in Sorted Array 54.5% Medium 1061 Lexicographically Smallest Equivalent String 65.2% Medium 1062 Longest Repeating Substring 57.2% Medium 1063 Number of Valid Subarrays 71.1% Hard 1064 Fixed Point 66.5% Easy 1065 Index Pairs of a String 60.6% Easy 1066 Campus Bikes II 54.2% Medium 1067 Digit Count in Range 40.0% Hard 1068 Product Sales Analysis I 83.1% Easy 1069 Product Sales Analysis II 82.9% Easy 1070 Product Sales Analysis III 48.9% Medium 1071 Greatest Common Divisor of Strings 53.0% Easy 1072 Flip Columns For Maximum Number of Equal Rows 60.8% Medium 1073 Adding Two Negabinary Numbers Go 34.0% Medium 1074 Number of Submatrices That Sum to Target Go 59.3% Hard 1075 Project Employees I 64.9% Easy 1076 Project Employees II 53.7% Easy 1077 Project Employees III 75.4% Medium 1078 Occurrences After Bigram Go 64.7% Easy 1079 Letter Tile Possibilities Go 75.4% Medium 1080 Insufficient Nodes in Root to Leaf Paths 49.3% Medium 1081 Smallest Subsequence of Distinct Characters 50.4% Medium 1082 Sales Analysis I 71.7% Easy 1083 Sales Analysis II 50.6% Easy 1084 Sales Analysis III 54.2% Easy 1085 Sum of Digits in the Minimum Number 74.6% Easy 1086 High Five 79.6% Easy 1087 Brace Expansion 62.7% Medium 1088 Confusing Number II 43.9% Hard 1089 Duplicate Zeros Go 53.0% Easy 1090 Largest Values From Labels 58.9% Medium 1091 Shortest Path in Binary Matrix 38.2% Medium 1092 Shortest Common Supersequence 51.6% Hard 1093 Statistics from a Large Sample Go 48.2% Medium 1094 Car Pooling 56.7% Medium 1095 Find in Mountain Array 35.7% Hard 1096 Brace Expansion II 62.1% Hard 1097 Game Play Analysis V 54.4% Hard 1098 Unpopular Books 44.4% Medium 1099 Two Sum Less Than K 60.6% Easy 1100 Find K-Length Substrings With No Repeated Characters 72.7% Medium 1101 The Earliest Moment When Everyone Become Friends 66.2% Medium 1102 Path With Maximum Minimum Value 49.2% Medium 1103 Distribute Candies to People 60.5% Easy 1104 Path In Zigzag Labelled Binary Tree 72.0% Medium 1105 Filling Bookcase Shelves Go 58.1% Medium 1106 Parsing A Boolean Expression 58.5% Hard 1107 New Users Daily Count 45.1% Medium 1108 Defanging an IP Address Go 87.5% Easy 1109 Corporate Flight Bookings 52.8% Medium 1110 Delete Nodes And Return Forest Go 67.0% Medium 1111 Maximum Nesting Depth of Two Valid Parentheses Strings Go 70.4% Medium 1112 Highest Grade For Each Student 69.4% Medium 1113 Reported Posts 64.1% Easy 1114 Print in Order 65.7% Easy 1115 Print FooBar Alternately 58.5% Medium 1116 Print Zero Even Odd 56.0% Medium 1117 Building H2O 52.6% Medium 1118 Number of Days in a Month 57.4% Easy 1119 Remove Vowels from a String 89.9% Easy 1120 Maximum Average Subtree 62.0% Medium 1121 Divide Array Into Increasing Sequences 56.8% Hard 1122 Relative Sort Array Go 67.7% Easy 1123 Lowest Common Ancestor of Deepest Leaves Go 66.8% Medium 1124 Longest Well-Performing Interval 32.7% Medium 1125 Smallest Sufficient Team 46.5% Hard 1126 Active Businesses 68.5% Medium 1127 User Purchase Platform 48.9% Hard 1128 Number of Equivalent Domino Pairs Go 47.3% Easy 1129 Shortest Path with Alternating Colors 38.9% Medium 1130 Minimum Cost Tree From Leaf Values 66.1% Medium 1131 Maximum of Absolute Value Expression 53.1% Medium 1132 Reported Posts II 34.4% Medium 1133 Largest Unique Number 66.9% Easy 1134 Armstrong Number 78.3% Easy 1135 Connecting Cities With Minimum Cost 57.5% Medium 1136 Parallel Courses 61.1% Hard 1137 N-th Tribonacci Number Go 55.9% Easy 1138 Alphabet Board Path 48.4% Medium 1139 Largest 1-Bordered Square 47.5% Medium 1140 Stone Game II 63.3% Medium 1141 User Activity for the Past 30 Days I 54.1% Easy 1142 User Activity for the Past 30 Days II 34.5% Easy 1143 Longest Common Subsequence 58.4% Medium 1144 Decrease Elements To Make Array Zigzag 45.4% Medium 1145 Binary Tree Coloring Game Go 51.3% Medium 1146 Snapshot Array 37.1% Medium 1147 Longest Chunked Palindrome Decomposition 58.6% Hard 1148 Article Views I 75.8% Easy 1149 Article Views II 48.1% Medium 1150 Check If a Number Is Majority Element in a Sorted Array 59.2% Easy 1151 Minimum Swaps to Group All 1's Together 59.3% Medium 1152 Analyze User Website Visit Pattern 43.5% Medium 1153 String Transforms Into Another String 35.8% Hard 1154 Day of the Year Go 49.3% Easy 1155 Number of Dice Rolls With Target Sum 49.1% Medium 1156 Swap For Longest Repeated Character Substring 48.9% Medium 1157 Online Majority Element In Subarray Go 38.9% Hard 1158 Market Analysis I 61.7% Medium 1159 Market Analysis II 52.9% Hard 1160 Find Words That Can Be Formed by Characters Go 67.4% Easy 1161 Maximum Level Sum of a Binary Tree 72.2% Medium 1162 As Far from Land as Possible 43.4% Medium 1163 Last Substring in Lexicographical Order 33.8% Hard 1164 Product Price at a Given Date 65.8% Medium 1165 Single-Row Keyboard 84.8% Easy 1166 Design File System 56.8% Medium 1167 Minimum Cost to Connect Sticks 62.7% Medium 1168 Optimize Water Distribution in a Village 60.9% Hard 1169 Invalid Transactions 31.2% Medium 1170 Compare Strings by Frequency of the Smallest Character Go 58.6% Easy 1171 Remove Zero Sum Consecutive Nodes from Linked List Go 41.4% Medium 1172 Dinner Plate Stacks 38.2% Hard 1173 Immediate Food Delivery I 80.4% Easy 1174 Immediate Food Delivery II 58.4% Medium 1175 Prime Arrangements Go 51.0% Easy 1176 Diet Plan Performance 53.9% Easy 1177 Can Make Palindrome from Substring 34.6% Medium 1178 Number of Valid Words for Each Puzzle 37.9% Hard 1179 Reformat Department Table 80.5% Easy 1180 Count Substrings with Only One Distinct Letter 77.0% Easy 1181 Before and After Puzzle 44.4% Medium 1182 Shortest Distance to Target Color 52.8% Medium 1183 Maximum Number of Ones 54.4% Hard 1184 Distance Between Bus Stops Go 54.4% Easy 1185 Day of the Week Go 64.0% Easy 1186 Maximum Subarray Sum with One Deletion 37.4% Medium 1187 Make Array Strictly Increasing 41.8% Hard 1188 Design Bounded Blocking Queue 70.5% Medium 1189 Maximum Number of Balloons Go 61.2% Easy 1190 Reverse Substrings Between Each Pair of Parentheses 61.5% Medium 1191 K-Concatenation Maximum Sum 25.9% Medium 1192 Critical Connections in a Network 48.6% Hard 1193 Monthly Transactions I 68.2% Medium 1194 Tournament Winners 52.8% Hard 1195 Fizz Buzz Multithreaded 68.3% Medium 1196 How Many Apples Can You Put into the Basket 68.1% Easy 1197 Minimum Knight Moves 36.1% Medium 1198 Find Smallest Common Element in All Rows 74.9% Medium 1199 Minimum Time to Build Blocks 37.3% Hard 1200 Minimum Absolute Difference Go 66.6% Easy 1201 Ugly Number III Go 25.9% Medium 1202 Smallest String With Swaps Go 46.5% Medium 1203 Sort Items by Groups Respecting Dependencies 47.6% Hard 1204 Last Person to Fit in the Elevator 69.7% Medium 1205 Monthly Transactions II 45.1% Medium 1206 Design Skiplist 57.4% Hard 1207 Unique Number of Occurrences Go 71.6% Easy 1208 Get Equal Substrings Within Budget Go 41.9% Medium 1209 Remove All Adjacent Duplicates in String II 56.8% Medium 1210 Minimum Moves to Reach Target with Rotations 45.2% Hard 1211 Queries Quality and Percentage 68.3% Easy 1212 Team Scores in Football Tournament 55.7% Medium 1213 Intersection of Three Sorted Arrays 78.9% Easy 1214 Two Sum BSTs 67.6% Medium 1215 Stepping Numbers 41.6% Medium 1216 Valid Palindrome III 47.7% Hard 1217 Play with Chips Go 64.3% Easy 1218 Longest Arithmetic Subsequence of Given Difference 44.5% Medium 1219 Path with Maximum Gold 65.1% Medium 1220 Count Vowels Permutation 53.9% Hard 1221 Split a String in Balanced Strings Go 83.2% Easy 1222 Queens That Can Attack the King 68.7% Medium 1223 Dice Roll Simulation 45.6% Medium 1224 Maximum Equal Frequency 33.5% Hard 1225 Report Contiguous Dates 61.2% Hard 1226 The Dining Philosophers 55.7% Medium 1227 Airplane Seat Assignment Probability 61.0% Medium 1228 Missing Number In Arithmetic Progression 52.6% Easy 1229 Meeting Scheduler 52.6% Medium 1230 Toss Strange Coins 48.7% Medium 1231 Divide Chocolate 52.3% Hard 1232 Check If It Is a Straight Line Go 45.3% Easy 1233 Remove Sub-Folders from the Filesystem 59.5% Medium 1234 Replace the Substring for Balanced String Go 33.3% Medium 1235 Maximum Profit in Job Scheduling Go 44.1% Hard 1236 Web Crawler 64.3% Medium 1237 Find Positive Integer Solution for a Given Equation 69.6% Easy 1238 Circular Permutation in Binary Representation 64.9% Medium 1239 Maximum Length of a Concatenated String with Unique Characters 47.8% Medium 1240 Tiling a Rectangle with the Fewest Squares 50.1% Hard 1241 Number of Comments per Post 67.0% Easy 1242 Web Crawler Multithreaded 45.9% Medium 1243 Array Transformation 51.0% Easy 1244 Design A Leaderboard 60.7% Medium 1245 Tree Diameter 60.0% Medium 1246 Palindrome Removal 46.0% Hard 1247 Minimum Swaps to Make Strings Equal 60.0% Medium 1248 Count Number of Nice Subarrays 56.4% Medium 1249 Minimum Remove to Make Valid Parentheses 62.5% Medium 1250 Check If It Is a Good Array 55.7% Hard 1251 Average Selling Price 81.4% Easy 1252 Cells with Odd Values in a Matrix Go 78.1% Easy 1253 Reconstruct a 2-Row Binary Matrix 40.4% Medium 1254 Number of Closed Islands Go 60.3% Medium 1255 Maximum Score Words Formed by Letters 69.3% Hard 1256 Encode Number 66.0% Medium 1257 Smallest Common Region 58.8% Medium 1258 Synonymous Sentences 64.4% Medium 1259 Handshakes That Don't Cross 53.5% Hard 1260 Shift 2D Grid Go 61.3% Easy 1261 Find Elements in a Contaminated Binary Tree 74.3% Medium 1262 Greatest Sum Divisible by Three 47.6% Medium 1263 Minimum Moves to Move a Box to Their Target Location 41.4% Hard 1264 Page Recommendations 67.5% Medium 1265 Print Immutable Linked List in Reverse 94.6% Medium 1266 Minimum Time Visiting All Points Go 79.6% Easy 1267 Count Servers that Communicate 57.9% Medium 1268 Search Suggestions System 63.3% Medium 1269 Number of Ways to Stay in the Same Place After Some Steps 43.2% Hard 1270 All People Report to the Given Manager 87.0% Medium 1271 Hexspeak 54.2% Easy 1272 Remove Interval 58.6% Medium 1273 Delete Tree Nodes 63.5% Medium 1274 Number of Ships in a Rectangle 66.5% Hard 1275 Find Winner on a Tic Tac Toe Game Go 52.9% Easy 1276 Number of Burgers with No Waste of Ingredients 49.6% Medium 1277 Count Square Submatrices with All Ones 73.2% Medium 1278 Palindrome Partitioning III 59.9% Hard 1279 Traffic Light Controlled Intersection 74.3% Easy 1280 Students and Examinations 72.1% Easy 1281 Subtract the Product and Sum of Digits of an Integer Go 85.2% Easy 1282 Group the People Given the Group Size They Belong To 83.9% Medium 1283 Find the Smallest Divisor Given a Threshold Go 47.6% Medium 1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix 69.5% Hard 1285 Find the Start and End Number of Continuous Ranges 83.7% Medium 1286 Iterator for Combination 68.1% Medium 1287 Element Appearing More Than 25% In Sorted Array Go 60.2% Easy 1288 Remove Covered Intervals 58.0% Medium 1289 Minimum Falling Path Sum II 61.0% Hard 1290 Convert Binary Number in a Linked List to Integer Go 80.2% Easy 1291 Sequential Digits 53.4% Medium 1292 Maximum Side Length of a Square with Sum Less than or Equal to Threshold 48.5% Medium 1293 Shortest Path in a Grid with Obstacles Elimination 42.7% Hard 1294 Weather Type in Each Country 63.1% Easy 1295 Find Numbers with Even Number of Digits Go 81.6% Easy 1296 Divide Array in Sets of K Consecutive Numbers 53.7% Medium 1297 Maximum Number of Occurrences of a Substring 47.3% Medium 1298 Maximum Candies You Can Get from Boxes 58.9% Hard 1299 Replace Elements with Greatest Element on Right Side Go 75.4% Easy 1300 Sum of Mutated Array Closest to Target Go 44.2% Medium 1301 Number of Paths with Max Score 37.2% Hard 1302 Deepest Leaves Sum Go 83.6% Medium 1303 Find the Team Size 87.8% Easy 1304 Find N Unique Integers Sum up to Zero Go 76.3% Easy 1305 All Elements in Two Binary Search Trees Go 76.1% Medium 1306 Jump Game III Go 60.5% Medium 1307 Verbal Arithmetic Puzzle 37.6% Hard 1308 Running Total for Different Genders 84.0% Medium 1309 Decrypt String from Alphabet to Integer Mapping 76.7% Easy 1310 XOR Queries of a Subarray 68.6% Medium 1311 Get Watched Videos by Your Friends 43.1% Medium 1312 Minimum Insertion Steps to Make a String Palindrome 58.1% Hard 1313 Decompress Run-Length Encoded List Go 85.1% Easy 1314 Matrix Block Sum 73.7% Medium 1315 Sum of Nodes with Even-Valued Grandparent 83.5% Medium 1316 Distinct Echo Substrings 46.4% Hard 1317 Convert Integer to the Sum of Two No-Zero Integers Go 56.7% Easy 1318 Minimum Flips to Make a OR b Equal to c 62.8% Medium 1319 Number of Operations to Make Network Connected 53.1% Medium 1320 Minimum Distance to Type a Word Using Two Fingers 62.3% Hard 1321 Restaurant Growth 67.7% Medium 1322 Ads Performance 57.8% Easy 1323 Maximum 69 Number 77.9% Easy 1324 Print Words Vertically 58.0% Medium 1325 Delete Leaves With a Given Value 72.9% Medium 1326 Minimum Number of Taps to Open to Water a Garden 43.5% Hard 1327 List the Products Ordered in a Period 76.3% Easy 1328 Break a Palindrome 43.3% Medium 1329 Sort the Matrix Diagonally 78.4% Medium 1330 Reverse Subarray To Maximize Array Value 35.1% Hard 1331 Rank Transform of an Array 58.1% Easy 1332 Remove Palindromic Subsequences 60.0% Easy 1333 Filter Restaurants by Vegan-Friendly, Price and Distance 54.6% Medium 1334 Find the City With the Smallest Number of Neighbors at a Threshold Distance 44.5% Medium 1335 Minimum Difficulty of a Job Schedule 57.5% Hard 1336 Number of Transactions per Visit 43.5% Hard 1337 The K Weakest Rows in a Matrix 68.7% Easy 1338 Reduce Array Size to The Half 66.6% Medium 1339 Maximum Product of Splitted Binary Tree 37.2% Medium 1340 Jump Game V 57.5% Hard 1341 Movie Rating 56.6% Medium 1342 Number of Steps to Reduce a Number to Zero 86.3% Easy 1343 Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold 64.2% Medium 1344 Angle Between Hands of a Clock 61.4% Medium 1345 Jump Game IV 38.1% Hard 1346 Check If N and Its Double Exist 38.0% Easy 1347 Minimum Number of Steps to Make Two Strings Anagram 74.6% Medium 1348 Tweet Counts Per Frequency 29.0% Medium 1349 Maximum Students Taking Exam 41.9% Hard 1350 Students With Invalid Departments 89.4% Easy 1351 Count Negative Numbers in a Sorted Matrix 76.6% Easy 1352 Product of the Last K Numbers 43.6% Medium 1353 Maximum Number of Events That Can Be Attended 30.5% Medium 1354 Construct Target Array With Multiple Sums 31.9% Hard 1355 Activity Participants 69.2% Medium 1356 Sort Integers by The Number of 1 Bits 68.6% Easy 1357 Apply Discount Every n Orders 66.0% Medium 1358 Number of Substrings Containing All Three Characters 58.0% Medium 1359 Count All Valid Pickup and Delivery Options 57.9% Hard 1360 Number of Days Between Two Dates 48.8% Easy 1361 Validate Binary Tree Nodes 48.6% Medium 1362 Closest Divisors 56.7% Medium 1363 Largest Multiple of Three 33.5% Hard 1364 Number of Trusted Contacts of a Customer 75.3% Medium 1365 How Many Numbers Are Smaller Than the Current Number 85.6% Easy 1366 Rank Teams by Votes 52.4% Medium 1367 Linked List in Binary Tree 39.7% Medium 1368 Minimum Cost to Make at Least One Valid Path in a Grid 54.4% Hard 1369 Get the Second Most Recent Activity 64.7% Hard 1370 Increasing Decreasing String 75.6% Easy 1371 Find the Longest Substring Containing Vowels in Even Counts 57.3% Medium 1372 Longest ZigZag Path in a Binary Tree 54.0% Medium 1373 Maximum Sum BST in Binary Tree 40.2% Hard 1374 Generate a String With Characters That Have Odd Counts 75.4% Easy 1375 Bulb Switcher III 62.5% Medium 1376 Time Needed to Inform All Employees 55.5% Medium 1377 Frog Position After T Seconds 33.6% Hard 1378 Replace Employee ID With The Unique Identifier 87.4% Easy 1379 Find a Corresponding Node of a Binary Tree in a Clone of That Tree 83.8% Medium 1380 Lucky Numbers in a Matrix Go 71.4% Easy 1381 Design a Stack With Increment Operation 74.7% Medium 1382 Balance a Binary Search Tree 74.8% Medium 1383 Maximum Performance of a Team 31.8% Hard 1384 Total Sales Amount by Year 62.8% Hard 1385 Find the Distance Value Between Two Arrays Go 67.1% Easy 1386 Cinema Seat Allocation 34.8% Medium 1387 Sort Integers by The Power Value 70.1% Medium 1388 Pizza With 3n Slices 44.7% Hard 1389 Create Target Array in the Given Order Go 84.1% Easy 1390 Four Divisors 38.1% Medium 1391 Check if There is a Valid Path in a Grid 44.5% Medium 1392 Longest Happy Prefix 40.0% Hard 1393 Capital Gain/Loss 89.2% Medium 1394 Find Lucky Integer in an Array 64.5% Easy 1395 Count Number of Teams 81.9% Medium 1396 Design Underground System 64.7% Medium 1397 Find All Good Strings 37.2% Hard 1398 Customers Who Bought Products A and B but Not C 80.6% Medium 1399 Count Largest Group 65.0% Easy 1400 Construct K Palindrome Strings 60.4% Medium 1401 Circle and Rectangle Overlapping 41.8% Medium 1402 Reducing Dishes 72.8% Hard 1403 Minimum Subsequence in Non-Increasing Order 70.8% Easy 1404 Number of Steps to Reduce a Number in Binary Representation to One 50.3% Medium 1405 Longest Happy String 49.0% Medium 1406 Stone Game III 56.0% Hard 1407 Top Travellers 82.1% Easy 1408 String Matching in an Array 61.4% Easy 1409 Queries on a Permutation With Key 81.6% Medium 1410 HTML Entity Parser 53.9% Medium 1411 Number of Ways to Paint N × 3 Grid 61.2% Hard 1412 Find the Quiet Students in All Exams 66.6% Hard 1413 Minimum Value to Get Positive Step by Step Sum 65.2% Easy 1414 Find the Minimum Number of Fibonacci Numbers Whose Sum Is K 62.4% Medium 1415 The k-th Lexicographical String of All Happy Strings of Length n 70.4% Medium 1416 Restore The Array 36.7% Hard 1417 Reformat The String 55.0% Easy 1418 Display Table of Food Orders in a Restaurant 65.6% Medium 1419 Minimum Number of Frogs Croaking 46.3% Medium 1420 Build Array Where You Can Find The Maximum Exactly K Comparisons 65.2% Hard 1421 NPV Queries 80.5% Medium 1422 Maximum Score After Splitting a String 54.7% Easy 1423 Maximum Points You Can Obtain from Cards 42.5% Medium 1424 Diagonal Traverse II 42.3% Medium 1425 Constrained Subsequence Sum 44.1% Hard 1426 Counting Elements 58.7% Easy 1427 Perform String Shifts 53.0% Easy 1428 Leftmost Column with at Least a One 46.8% Medium 1429 First Unique Number 47.0% Medium 1430 Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree 44.8% Medium 1431 Kids With the Greatest Number of Candies 88.9% Easy 1432 Max Difference You Can Get From Changing an Integer 42.8% Medium 1433 Check If a String Can Break Another String 65.7% Medium 1434 Number of Ways to Wear Different Hats to Each Other 38.0% Hard 1435 Create a Session Bar Chart 76.7% Easy 1436 Destination City 77.3% Easy 1437 Check If All 1's Are at Least Length K Places Away 63.3% Medium 1438 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit 41.9% Medium 1439 Find the Kth Smallest Sum of a Matrix With Sorted Rows 59.4% Hard 1440 Evaluate Boolean Expression 70.1% Medium 1441 Build an Array With Stack Operations 68.8% Easy 1442 Count Triplets That Can Form Two Arrays of Equal XOR 69.4% Medium 1443 Minimum Time to Collect All Apples in a Tree 55.5% Medium 1444 Number of Ways of Cutting a Pizza 52.7% Hard 1445 Apples & Oranges 87.2% Medium 1446 Consecutive Characters 60.4% Easy 1447 Simplified Fractions 61.0% Medium 1448 Count Good Nodes in Binary Tree 70.6% Medium 1449 Form Largest Integer With Digits That Add up to Target 41.8% Hard 1450 Number of Students Doing Homework at a Given Time 78.1% Easy 1451 Rearrange Words in a Sentence 54.8% Medium 1452 People Whose List of Favorite Companies Is Not a Subset of Another List 53.3% Medium 1453 Maximum Number of Darts Inside of a Circular Dartboard 33.7% Hard 1454 Active Users 37.5% Medium 1455 Check If a Word Occurs As a Prefix of Any Word in a Sentence Go 64.7% Easy 1456 Maximum Number of Vowels in a Substring of Given Length 52.4% Medium 1457 Pseudo-Palindromic Paths in a Binary Tree 67.2% Medium 1458 Max Dot Product of Two Subsequences 41.7% Hard 1459 Rectangles Area 61.5% Medium 1460 Make Two Arrays Equal by Reversing Sub-arrays 74.0% Easy 1461 Check If a String Contains All Binary Codes of Size K 44.6% Medium 1462 Course Schedule IV 41.7% Medium 1463 Cherry Pickup II 65.5% Hard 1464 Maximum Product of Two Elements in an Array Go 78.1% Easy 1465 Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts 30.8% Medium 1466 Reorder Routes to Make All Paths Lead to the City Zero 63.6% Medium 1467 Probability of a Two Boxes Having The Same Number of Distinct Balls 61.1% Hard 1468 Calculate Salaries 78.0% Medium 1469 Find All The Lonely Nodes 81.5% Easy 1470 Shuffle the Array Go 89.0% Easy 1471 The k Strongest Values in an Array 57.0% Medium 1472 Design Browser History 64.5% Medium 1473 Paint House III 48.1% Hard 1474 Delete N Nodes After M Nodes of a Linked List 74.2% Easy 1475 Final Prices With a Special Discount in a Shop 75.7% Easy 1476 Subrectangle Queries 90.5% Medium 1477 Find Two Non-overlapping Sub-arrays Each With Target Sum 29.8% Medium 1478 Allocate Mailboxes 55.0% Hard 1479 Sales by Day of the Week 83.4% Hard 1480 Running Sum of 1d Array 90.6% Easy 1481 Least Number of Unique Integers after K Removals 53.7% Medium 1482 Minimum Number of Days to Make m Bouquets 45.7% Medium 1483 Kth Ancestor of a Tree Node 27.6% Hard 1484 Group Sold Products By The Date 86.0% Easy 1485 Clone Binary Tree With Random Pointer 81.4% Medium 1486 XOR Operation in an Array 85.1% Easy 1487 Making File Names Unique 29.2% Medium 1488 Avoid Flood in The City 25.3% Medium 1489 Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree 50.5% Hard 1490 Clone N-ary Tree 84.7% Medium 1491 Average Salary Excluding the Minimum and Maximum Salary 70.2% Easy 1492 The kth Factor of n 68.0% Medium 1493 Longest Subarray of 1's After Deleting One Element 58.4% Medium 1494 Parallel Courses II 32.2% Hard 1495 Friendly Movies Streamed Last Month 52.9% Easy 1496 Path Crossing 55.9% Easy 1497 Check If Array Pairs Are Divisible by k 41.2% Medium 1498 Number of Subsequences That Satisfy the Given Sum Condition 36.7% Medium 1499 Max Value of Equation 44.6% Hard 1500 Design a File Sharing System 46.4% Medium 1501 Countries You Can Safely Invest In 63.8% Medium 1502 Can Make Arithmetic Progression From Sequence 73.4% Easy 1503 Last Moment Before All Ants Fall Out of a Plank 51.5% Medium 1504 Count Submatrices With All Ones 61.6% Medium 1505 Minimum Possible Integer After at Most K Adjacent Swaps On Digits 36.1% Hard 1506 Find Root of N-Ary Tree 79.8% Medium 1507 Reformat Date 60.5% Easy 1508 Range Sum of Sorted Subarray Sums 68.6% Medium 1509 Minimum Difference Between Largest and Smallest Value in Three Moves 50.9% Medium 1510 Stone Game IV 50.2% Hard 1511 Customer Order Frequency 77.0% Easy 1512 Number of Good Pairs 88.7% Easy 1513 Number of Substrings With Only 1s 40.4% Medium 1514 Path with Maximum Probability 36.5% Medium 1515 Best Position for a Service Centre 35.8% Hard 1516 Move Sub-Tree of N-Ary Tree 60.2% Hard 1517 Find Users With Valid E-Mails 71.2% Easy 1518 Water Bottles 63.1% Easy 1519 Number of Nodes in the Sub-Tree With the Same Label 35.1% Medium 1520 Maximum Number of Non-Overlapping Substrings 32.7% Hard 1521 Find a Value of a Mysterious Function Closest to Target 43.3% Hard 1522 Diameter of N-Ary Tree 70.0% Medium 1523 Count Odd Numbers in an Interval Range 55.7% Easy 1524 Number of Sub-arrays With Odd Sum 36.3% Medium 1525 Number of Good Ways to Split a String 70.0% Medium 1526 Minimum Number of Increments on Subarrays to Form a Target Array 57.5% Hard 1527 Patients With a Condition 88.4% Easy 1528 Shuffle String 86.1% Easy 1529 Bulb Switcher IV 70.4% Medium 1530 Number of Good Leaf Nodes Pairs 53.4% Medium 1531 String Compression II 28.6% Hard 1532 The Most Recent Three Orders 75.1% Medium 1533 Find the Index of the Large Integer 57.7% Medium 1534 Count Good Triplets 79.4% Easy 1535 Find the Winner of an Array Game 45.5% Medium 1536 Minimum Swaps to Arrange a Binary Grid 41.5% Medium 1537 Get the Maximum Score 35.7% Hard 1538 Guess the Majority in a Hidden Array 56.9% Medium ------------ ------------------------------------------------------- ------- ---------------- --------------- -------------