1. Two Sum Easy C C++ 2. Add Two Numbers Medium C++ 3. Longest Substring Without Repeating Characters Medium C C++ 4. Median of Two Sorted Arrays Hard C C++ 5. Longest Palindromic Substring Medium C C++ 6. Zigzag Conversion Medium C C++ 7. Reverse Integer Medium C C++ 8. String to Integer (atoi) Medium C C++ 9. Palindrome Number Easy C C++ 10. Regular Expression Matching Hard C C++ 11. Container With Most Water Medium C++ 12. Integer to Roman Medium C C++ 13. Roman to Integer Easy C C++ 14. Longest Common Prefix Easy C C++ 15. 3Sum Medium C++ 16. 3Sum Closest Medium C C++ 17. Letter Combinations of a Phone Number Medium C++ 18. 4Sum Medium C C++ 19. Remove Nth Node From End of List Medium C++ 20. Valid Parentheses Easy C C++ 21. Merge Two Sorted Lists Easy C++ 22. Generate Parentheses Medium C C++ 23. Merge k Sorted Lists Hard C++ 24. Swap Nodes in Pairs Medium C++ 25. Reverse Nodes in k-Group Hard C++ 26. Remove Duplicates from Sorted Array Easy C++ 27. Remove Element Easy C++ 28. Find the Index of the First Occurrence in a String Easy C C++ 29. Divide Two Integers Medium C C++ 30. Substring with Concatenation of All Words Hard C++ 31. Next Permutation Medium C++ 32. Longest Valid Parentheses Hard C C++ 33. Search in Rotated Sorted Array Medium C++ 34. Find First and Last Position of Element in Sorted Array Medium C++ 35. Search Insert Position Easy C++ 36. Valid Sudoku Medium C C++ 37. Sudoku Solver Hard C++ 38. Count and Say Medium C C++ 39. Combination Sum Medium C++ 40. Combination Sum II Medium C C++ 41. First Missing Positive Hard C C++ 42. Trapping Rain Water Hard C C++ 43. Multiply Strings Medium C C++ 45. Jump Game II Medium C C++ 46. Permutations Medium C C++ 47. Permutations II Medium C C++ 48. Rotate Image Medium C++ 49. Group Anagrams Medium C++ 50. Pow(x, n) Medium C C++ 51. N-Queens Hard C++ 52. N-Queens II Hard C C++ 53. Maximum Subarray Medium C C++ 54. Spiral Matrix Medium C C++ 55. Jump Game Medium C C++ 56. Merge Intervals Medium C C++ 57. Insert Interval Medium C C++ 58. Length of Last Word Easy C C++ 59. Spiral Matrix II Medium C C++ 60. Permutation Sequence Hard C C++ 61. Rotate List Medium C++ 62. Unique Paths Medium C C++ 63. Unique Paths II Medium C C++ 64. Minimum Path Sum Medium C C++ 65. Valid Number Hard C C++ 66. Plus One Easy C C++ 67. Add Binary Easy C C++ 68. Text Justification Hard C C++ 69. Sqrt(x) Easy C C++ 70. Climbing Stairs Easy C C++ 71. Simplify Path Medium C C++ 73. Set Matrix Zeroes Medium C++ 74. Search a 2D Matrix Medium C C++ 75. Sort Colors Medium C++ 77. Combinations Medium C C++ 78. Subsets Medium C++ 79. Word Search Medium C C++ 80. Remove Duplicates from Sorted Array II Medium C++ 81. Search in Rotated Sorted Array II Medium C C++ 82. Remove Duplicates from Sorted List II Medium C++ 83. Remove Duplicates from Sorted List Easy C++ 84. Largest Rectangle in Histogram Hard C C++ 85. Maximal Rectangle Hard C C++ 86. Partition List Medium C++ 87. Scramble String Hard C C++ 88. Merge Sorted Array Easy C++ 89. Gray Code Medium C C++ 90. Subsets II Medium C C++ 91. Decode Ways Medium C C++ 92. Reverse Linked List II Medium C++ 93. Restore IP Addresses Medium C C++ 94. Binary Tree Inorder Traversal Easy C++ 97. Interleaving String Medium C C++ 98. Validate Binary Search Tree Medium C++ 100. Same Tree Easy C++ 101. Symmetric Tree Easy C++ 102. Binary Tree Level Order Traversal Medium C++ 104. Maximum Depth of Binary Tree Easy C++ 105. Construct Binary Tree from Preorder and Inorder Traversal Medium C++ 106. Construct Binary Tree from Inorder and Postorder Traversal Medium C++ 107. Binary Tree Level Order Traversal II Medium C++ 112. Path Sum Easy C++ 113. Path Sum II Medium C++ 114. Flatten Binary Tree to Linked List Medium C++ 115. Distinct Subsequences Hard C C++ 118. Pascal's Triangle Easy C C++ 119. Pascal's Triangle II Easy C C++ 120. Triangle Medium C C++ 121. Best Time to Buy and Sell Stock Easy C C++ 122. Best Time to Buy and Sell Stock II Medium C C++ 123. Best Time to Buy and Sell Stock III Hard C C++ 125. Valid Palindrome Easy C C++ 128. Longest Consecutive Sequence Medium C C++ 129. Sum Root to Leaf Numbers Medium C++ 130. Surrounded Regions Medium C++ 131. Palindrome Partitioning Medium C C++ 134. Gas Station Medium C C++ 135. Candy Hard C C++ 136. Single Number Easy C C++ 137. Single Number II Medium C C++ 140. Word Break II Hard C++ 141. Linked List Cycle Easy C++ 142. Linked List Cycle II Medium C++ 143. Reorder List Medium C++ 144. Binary Tree Preorder Traversal Easy C++ 145. Binary Tree Postorder Traversal Easy C++ 148. Sort List Medium C++ 149. Max Points on a Line Hard C++ 150. Evaluate Reverse Polish Notation Medium C C++ 151. Reverse Words in a String Medium C C++ 152. Maximum Product Subarray Medium C C++ 153. Find Minimum in Rotated Sorted Array Medium C C++ 164. Maximum Gap Medium C C++ 165. Compare Version Numbers Medium C C++ 166. Fraction to Recurring Decimal Medium C++ 168. Excel Sheet Column Title Easy C C++ 169. Majority Element Easy C C++ 171. Excel Sheet Column Number Easy C++ 173. Binary Search Tree Iterator Medium C++ 179. Largest Number Medium C C++ 190. Reverse Bits Easy C C++ 191. Number of 1 Bits Easy C C++ 198. House Robber Medium C C++ 199. Binary Tree Right Side View Medium C++ 200. Number of Islands Medium C C++ 201. Bitwise AND of Numbers Range Medium C C++ 202. Happy Number Easy C++ 203. Remove Linked List Elements Easy C++ 204. Count Primes Medium C C++ 205. Isomorphic Strings Easy C C++ 206. Reverse Linked List Easy C++ 208. Implement Trie (Prefix Tree) Medium C++ 213. House Robber II Medium C C++ 214. Shortest Palindrome Hard C++ 215. Kth Largest Element in an Array Medium C C++ 216. Combination Sum III Medium C C++ 217. Contains Duplicate Easy C C++ 219. Contains Duplicate II Easy C++ 222. Count Complete Tree Nodes Easy C++ 224. Basic Calculator Hard C C++ 225. Implement Stack using Queues Easy C++ 226. Invert Binary Tree Easy C++ 227. Basic Calculator II Medium C C++ 228. Summary Ranges Easy C C++ 229. Majority Element II Medium C C++ 230. Kth Smallest Element in a BST Medium C++ 231. Power of Two Easy C C++ 232. Implement Queue using Stacks Easy C++ 234. Palindrome Linked List Easy C++ 235. Lowest Common Ancestor of a Binary Search Tree Medium C++ 236. Lowest Common Ancestor of a Binary Tree Medium C++ 237. Delete Node in a Linked List Medium C++ 238. Product of Array Except Self Medium C C++ 241. Different Ways to Add Parentheses Medium C++ 242. Valid Anagram Easy C C++ 257. Binary Tree Paths Easy C++ 258. Add Digits Easy C C++ 260. Single Number III Medium C C++ 263. Ugly Number Easy C C++ 264. Ugly Number II Medium C C++ 268. Missing Number Easy C C++ 273. Integer to English Words Hard C C++ 274. H-Index Medium C C++ 275. H-Index II Medium C C++ 278. First Bad Version Easy C++ 279. Perfect Squares Medium C C++ 283. Move Zeroes Easy C++ 284. Peeking Iterator Medium C++ 287. Find the Duplicate Number Medium C C++ 289. Game of Life Medium C++ 290. Word Pattern Easy C++ 292. Nim Game Easy C C++ 295. Find Median from Data Stream Hard C++ 297. Serialize and Deserialize Binary Tree Hard C++ 299. Bulls and Cows Medium C C++ 300. Longest Increasing Subsequence Medium C C++ 303. Range Sum Query - Immutable Easy C++ 310. Minimum Height Trees Medium C C++ 313. Super Ugly Number Medium C C++ 316. Remove Duplicate Letters Medium C++ 319. Bulb Switcher Medium C C++ 322. Coin Change Medium C C++ 326. Power of Three Easy C C++ 330. Patching Array Hard C C++ 334. Increasing Triplet Subsequence Medium C C++ 338. Counting Bits Easy C C++ 342. Power of Four Easy C C++ 343. Integer Break Medium C++ 344. Reverse String Easy C++ 345. Reverse Vowels of a String Easy C C++ 347. Top K Frequent Elements Medium C++ 349. Intersection of Two Arrays Easy C C++ 350. Intersection of Two Arrays II Easy C C++ 355. Design Twitter Medium C++ 357. Count Numbers with Unique Digits Medium C C++ 367. Valid Perfect Square Easy C C++ 368. Largest Divisible Subset Medium C C++ 373. Find K Pairs with Smallest Sums Medium C C++ 374. Guess Number Higher or Lower Medium C++ 380. Insert Delete GetRandom O(1) Medium C++ 383. Ransom Note Easy C C++ 386. Lexicographical Numbers Medium C C++ 387. First Unique Character in a String Easy C C++ 389. Find the Difference Easy C++ 392. Is Subsequence Easy C++ 396. Rotate Function Medium C C++ 402. Remove K Digits Medium C C++ 404. Sum of Left Leaves Easy C++ 405. Convert a Number to Hexadecimal Easy C C++ 407. Trapping Rain Water II Hard C C++ 409. Longest Palindrome Easy C C++ 412. Fizz Buzz Easy C C++ 413. Arithmetic Slices Medium C C++ 414. Third Maximum Number Easy C C++ 415. Add Strings Easy C C++ 416. Partition Equal Subset Sum Medium C C++ 417. Pacific Atlantic Water Flow Medium C C++ 419. Battleships in a Board Medium C C++ 429. N-ary Tree Level Order Traversal Medium C++ 432. All O`one Data Structure Hard C++ 434. Number of Segments in a String Easy C C++ 440. K-th Smallest in Lexicographical Order Hard C C++ 441. Arranging Coins Easy C C++ 442. Find All Duplicates in an Array Medium C C++ 446. Arithmetic Slices II - Subsequence Hard C++ 448. Find All Numbers Disappeared in an Array Easy C C++ 451. Sort Characters By Frequency Medium C C++ 452. Minimum Number of Arrows to Burst Balloons Medium C C++ 454. 4Sum II Medium C++ 455. Assign Cookies Easy C C++ 456. 132 Pattern Medium C C++ 458. Poor Pigs Hard C C++ 459. Repeated Substring Pattern Easy C C++ 461. Hamming Distance Easy C C++ 462. Minimum Moves to Equal Array Elements II Medium C C++ 463. Island Perimeter Easy C C++ 474. Ones and Zeroes Medium C C++ 476. Number Complement Easy C C++ 485. Max Consecutive Ones Easy C++ 494. Target Sum Medium C C++ 495. Teemo Attacking Medium C C++ 496. Next Greater Element I Easy C C++ 498. Diagonal Traverse Medium C C++ 500. Keyboard Row Easy C C++ 502. IPO Hard C C++ 504. Base 7 Easy C C++ 506. Relative Ranks Easy C C++ 508. Most Frequent Subtree Sum Medium C++ 509. Fibonacci Number Easy C C++ 513. Find Bottom Left Tree Value Medium C++ 514. Freedom Trail Hard C C++ 515. Find Largest Value in Each Tree Row Medium C++ 520. Detect Capital Easy C C++ 523. Continuous Subarray Sum Medium C C++ 525. Contiguous Array Medium C++ 529. Minesweeper Medium C++ 535. Encode and Decode TinyURL Medium C++ 537. Complex Number Multiplication Medium C C++ 538. Convert BST to Greater Tree Medium C++ 539. Minimum Time Difference Medium C C++ 541. Reverse String II Easy C C++ 543. Diameter of Binary Tree Easy C++ 546. Remove Boxes Hard C C++ 547. Number of Provinces Medium C C++ 552. Student Attendance Record II Hard C C++ 557. Reverse Words in a String III Easy C C++ 559. Maximum Depth of N-ary Tree Easy C++ 561. Array Partition Easy C C++ 566. Reshape the Matrix Easy C C++ 567. Permutation in String Medium C C++ 575. Distribute Candies Easy C C++ 576. Out of Boundary Paths Medium C++ 587. Erect the Fence Hard C++ 589. N-ary Tree Preorder Traversal Easy C++ 590. N-ary Tree Postorder Traversal Easy C++ 592. Fraction Addition and Subtraction Medium C C++ 594. Longest Harmonious Subsequence Easy C C++ 598. Range Addition II Easy C C++ 605. Can Place Flowers Easy C C++ 606. Construct String from Binary Tree Easy C++ 611. Valid Triangle Number Medium C C++ 617. Merge Two Binary Trees Easy C++ 621. Task Scheduler Medium C C++ 623. Add One Row to Tree Medium C++ 624. Maximum Distance in Arrays Medium C C++ 628. Maximum Product of Three Numbers Easy C C++ 632. Smallest Range Covering Elements from K Lists Hard C++ 633. Sum of Square Numbers Medium C C++ 637. Average of Levels in Binary Tree Easy C++ 640. Solve the Equation Medium C C++ 641. Design Circular Deque Medium C++ 645. Set Mismatch Easy C C++ 647. Palindromic Substrings Medium C C++ 648. Replace Words Medium C++ 650. 2 Keys Keyboard Medium C C++ 654. Maximum Binary Tree Medium C++ 655. Print Binary Tree Medium C++ 657. Robot Return to Origin Easy C C++ 661. Image Smoother Easy C++ 664. Strange Printer Hard C C++ 669. Trim a Binary Search Tree Medium C++ 670. Maximum Swap Medium C C++ 678. Valid Parenthesis String Medium C C++ 679. 24 Game Hard C C++ 680. Valid Palindrome II Easy C C++ 682. Baseball Game Easy C C++ 684. Redundant Connection Medium C C++ 689. Maximum Sum of 3 Non-Overlapping Subarrays Hard C C++ 690. Employee Importance Medium C++ 695. Max Area of Island Medium C C++ 696. Count Binary Substrings Easy C C++ 700. Search in a Binary Search Tree Easy C++ 701. Insert into a Binary Search Tree Medium C++ 703. Kth Largest Element in a Stream Easy C++ 705. Design HashSet Easy C++ 709. To Lower Case Easy C C++ 712. Minimum ASCII Delete Sum for Two Strings Medium C C++ 713. Subarray Product Less Than K Medium C C++ 714. Best Time to Buy and Sell Stock with Transaction Fee Medium C C++ 717. 1-bit and 2-bit Characters Easy C C++ 719. Find K-th Smallest Pair Distance Hard C C++ 725. Split Linked List in Parts Medium C++ 726. Number of Atoms Hard C++ 728. Self Dividing Numbers Easy C C++ 729. My Calendar I Medium C++ 731. My Calendar II Medium C++ 732. My Calendar III Hard C++ 739. Daily Temperatures Medium C C++ 744. Find Smallest Letter Greater Than Target Easy C++ 746. Min Cost Climbing Stairs Easy C++ 752. Open the Lock Medium C C++ 757. Set Intersection Size At Least Two Hard C C++ 762. Prime Number of Set Bits in Binary Representation Easy C C++ 763. Partition Labels Medium C C++ 766. Toeplitz Matrix Easy C C++ 769. Max Chunks To Make Sorted Medium C++ 771. Jewels and Stones Easy C C++ 773. Sliding Puzzle Hard C++ 778. Swim in Rising Water Hard C C++ 779. K-th Symbol in Grammar Medium C C++ 781. Rabbits in Forest Medium C C++ 784. Letter Case Permutation Medium C C++ 786. K-th Smallest Prime Fraction Medium C C++ 787. Cheapest Flights Within K Stops Medium C C++ 790. Domino and Tromino Tiling Medium C C++ 791. Custom Sort String Medium C C++ 796. Rotate String Easy C C++ 797. All Paths From Source to Target Medium C C++ 802. Find Eventual Safe States Medium C C++ 804. Unique Morse Code Words Easy C++ 806. Number of Lines To Write String Easy C C++ 807. Max Increase to Keep City Skyline Medium C C++ 811. Subdomain Visit Count Medium C++ 812. Largest Triangle Area Easy C C++ 814. Binary Tree Pruning Medium C++ 815. Bus Routes Hard C++ 821. Shortest Distance to a Character Easy C C++ 823. Binary Trees With Factors Medium C++ 824. Goat Latin Easy C C++ 826. Most Profit Assigning Work Medium C C++ 827. Making A Large Island Hard C++ 832. Flipping an Image Easy C++ 834. Sum of Distances in Tree Hard C C++ 838. Push Dominoes Medium C C++ 840. Magic Squares In Grid Medium C C++ 841. Keys and Rooms Medium C C++ 844. Backspace String Compare Easy C++ 846. Hand of Straights medium C C++ 852. Peak Index in a Mountain Array medium C++ 857. Minimum Cost to Hire K Workers Hard C++ 859. Buddy Strings Easy C C++ 860. Lemonade Change Easy C C++ 861. Score After Flipping Matrix Medium C C++ 863. All Nodes Distance K in Binary Tree Medium C++ 865. Smallest Subtree with all the Deepest Nodes Medium C++ 867. Transpose Matrix Easy C C++ 869. Reordered Power of 2 Medium C C++ 872. Leaf-Similar Trees Easy C++ 873. Length of Longest Fibonacci Subsequence Medium C C++ 874. Walking Robot Simulation Medium C++ 875. Koko Eating Bananas Medium C C++ 876. Middle of the Linked List Easy C++ 877. Stone Game Medium C C++ 880. Decoded String at Index Medium C++ 881. Boats to Save People Medium C C++ 883. Projection Area of 3D Shapes Easy C C++ 884. Uncommon Words from Two Sentences Easy C++ 885. Spiral Matrix III Medium C C++ 888. Fair Candy Swap Easy C C++ 889. Construct Binary Tree from Preorder and Postorder Traversal Medium C++ 890. Find and Replace Pattern Medium C C++ 892. Surface Area of 3D Shapes Easy C C++ 893. Groups of Special-Equivalent Strings Medium C C++ 894. All Possible Full Binary Trees Medium C++ 897. Increasing Order Search Tree Easy C++ 898. Bitwise ORs of Subarrays Medium C++ 901. Online Stock Span Medium C++ 904. Fruit Into Baskets Medium C C++ 905. Sort Array By Parity Easy C++ 907. Sum of Subarray Minimums Medium C C++ 908. Smallest Range I Easy C C++ 909. Snakes and Ladders Medium C C++ 911. Online Election Medium C++ 912. Sort an Array Medium C C++ 914. X of a Kind in a Deck of Cards Easy C C++ 916. Word Subsets Medium C C++ 917. Reverse Only Letters Easy C C++ 921. Minimum Add to Make Parentheses Valid Medium C C++ 922. Sort Array By Parity II Easy C C++ 925. Long Pressed Name Easy C C++ 929. Unique Email Addresses Easy C C++ 930. Binary Subarrays With Sum Medium C C++ 931. Minimum Falling Path Sum Medium C++ 933. Number of Recent Calls Easy C++ 934. Shortest Bridge Medium C C++ 935. Knight Dialer Easy C C++ 938. Range Sum of BST Easy C++ 942. DI String Match Easy C C++ 944. Delete Columns to Make Sorted Easy C C++ 945. Minimum Increment to Make Array Unique Medium C C++ 946. Validate Stack Sequences Medium C C++ 947. Most Stones Removed with Same Row or Column Medium C++ 948. Bag of Tokens Medium C C++ 950. Reveal Cards In Increasing Order Medium C++ 951. Flip Equivalent Binary Trees Medium C++ 955. Delete Columns to Make Sorted II Medium C C++ 959. Regions Cut By Slashes Medium C C++ 961. N-Repeated Element in Size 2N Array Easy C C++ 962. Maximum Width Ramp Medium C C++ 965. Univalued Binary Tree Easy C++ 966. Vowel Spellchecker Medium C++ 969. Pancake Sorting Medium C++ 973. K Closest Points to Origin Medium C C++ 974. Subarray Sums Divisible by K Medium C C++ 976. Largest Perimeter Triangle Easy C C++ 977. Squares of a Sorted Array Easy C C++ 979. Distribute Coins in Binary Tree Medium C++ 980. Unique Paths III Hard C C++ 983. Minimum Cost For Tickets Medium C C++ 985. Sum of Even Numbers After Queries Medium C C++ 986. Interval List Intersections Medium C C++ 988. Smallest String Starting From Leaf Medium C++ 991. Broken Calculator Medium C C++ 992. Subarrays with K Different Integers Hard C++ 995. Minimum Number of K Consecutive Bit Flips Hard C C++ 997. Find the Town Judge Easy C C++ 998. Maximum Binary Tree II Medium C++ 999. Available Captures for Rook Easy C C++ 1002. Find Common Characters Easy C C++ 1004. Max Consecutive Ones III Easy C C++ 1006. Clumsy Factorial Medium C C++ 1007. Minimum Domino Rotations For Equal Row Medium C C++ 1008. Construct Binary Search Tree from Preorder Traversal Medium C++ 1009. Complement of Base 10 Integer Easy C C++ 1011. Capacity To Ship Packages Within D Days Medium C C++ 1014. Best Sightseeing Pair Medium C C++ 1015. Smallest Integer Divisible by K Medium C C++ 1018. Binary Prefix Divisible By 5 Easy C C++ 1020. Number of Enclaves Medium C C++ 1021. Remove Outermost Parentheses Easy C C++ 1022. Sum of Root To Leaf Binary Numbers Easy C++ 1025. Divisor Game Easy C C++ 1026. Maximum Difference Between Node and Ancestor Medium C++ 1028. Recover a Tree From Preorder Traversal Hard C++ 1029. Two City Scheduling Medium C C++ 1030. Matrix Cells in Distance Order Easy C C++ 1038. Binary Search Tree to Greater Sum Tree Medium C++ 1039. Minimum Score Triangulation of Polygon Medium C C++ 1043. Partition Array for Maximum Sum Medium C C++ 1046. Last Stone Weight Easy C C++ 1047. Remove All Adjacent Duplicates In String Medium C C++ 1048. Longest String Chain Medium C++ 1051. Height Checker Easy C C++ 1052. Grumpy Bookstore Owner Medium C C++ 1061. Lexicographically Smallest Equivalent String Medium C C++ 1071. Greatest Common Divisor of Strings Easy C C++ 1072. Flip Columns For Maximum Number of Equal Rows Medium C++ 1074. Number of Submatrices That Sum to Target Hard C C++ 1079. Letter Tile Possibilities Medium C C++ 1080. Insufficient Nodes in Root to Leaf Paths Medium C++ 1081. Smallest Subsequence of Distinct Characters Medium C++ 1090. Largest Values From Labels Medium C C++ 1092. Shortest Common Supersequence Hard C C++ 1103. Distribute Candies to People Easy C C++ 1104. Path In Zigzag Labelled Binary Tree Medium C C++ 1105. Filling Bookcase Shelves Medium C C++ 1106. Parsing A Boolean Expression Hard C C++ 1108. Defanging an IP Address Easy C C++ 1109. Corporate Flight Bookings Medium C C++ 1110. Delete Nodes And Return Forest Medium C++ 1111. Maximum Nesting Depth of Two Valid Parentheses Strings Medium C C++ 1122. Relative Sort Array Easy C C++ 1123. Lowest Common Ancestor of Deepest Leaves Medium C++ 1128. Number of Equivalent Domino Pairs Easy C C++ 1130. Minimum Cost Tree From Leaf Values Medium C++ 1137. N-th Tribonacci Number Easy C C++ 1140. Stone Game II Medium C C++ 1143. Longest Common Subsequence Medium C C++ 1155. Number of Dice Rolls With Target Sum Medium C C++ 1160. Find Words That Can Be Formed by Characters Easy C C++ 1161. Maximum Level Sum of a Binary Tree Medium C++ 1170. Compare Strings by Frequency of the Smallest Character Medium C++ 1175. Prime Arrangements Easy C C++ 1184. Distance Between Bus Stops Easy C C++ 1190. Reverse Substrings Between Each Pair of Parentheses Medium C C++ 1195. Fizz Buzz Multithreaded Medium C++ 1200. Minimum Absolute Difference Easy C C++ 1207. Unique Number of Occurrences Easy C++ 1208. Get Equal Substrings Within Budget Medium C C++ 1209. Remove All Adjacent Duplicates in String II Medium C C++ 1210. Minimum Moves to Reach Target with Rotations Hard C++ 1217. Minimum Cost to Move Chips to The Same Position Easy C C++ 1219. Path with Maximum Gold Medium C C++ 1220. Count Vowels Permutation Hard C C++ 1221. Split a String in Balanced Strings Easy C C++ 1222. Queens That Can Attack the King Medium C C++ 1232. Check If It Is a Straight Line Easy C++ 1233. Remove Sub-Folders from the Filesystem Medium C C++ 1235. Maximum Profit in Job Scheduling Hard C++ 1237. Find Positive Integer Solution for a Given Equation Medium C++ 1238. Circular Permutation in Binary Representation Medium C C++ 1239. Maximum Length of a Concatenated String with Unique Characters Medium C C++ 1247. Minimum Swaps to Make Strings Equal Medium C C++ 1248. Count Number of Nice Subarrays Medium C C++ 1252. Cells with Odd Values in a Matrix Easy C C++ 1253. Reconstruct a 2-Row Binary Matrix Medium C C++ 1255. Maximum Score Words Formed by Letters Hard C C++ 1261. Find Elements in a Contaminated Binary Tree Medium C++ 1262. Greatest Sum Divisible by Three Medium C C++ 1266. Minimum Time Visiting All Points Easy C C++ 1267. Count Servers that Communicate Medium C C++ 1269. Number of Ways to Stay in the Same Place After Some Steps Hard C++ 1275. Find Winner on a Tic Tac Toe Game Easy C C++ 1277. Count Square Submatrices with All Ones Medium C C++ 1281. Subtract the Product and Sum of Digits of an Integer Easy C C++ 1282. Group the People Given the Group Size They Belong To Medium C C++ 1286. Iterator for Combination Medium C++ 1287. Element Appearing More Than 25% In Sorted Array Easy C C++ 1289. Minimum Falling Path Sum II Hard C C++ 1290. Convert Binary Number in a Linked List to Integer Easy C++ 1291. Sequential Digits Medium C C++ 1295. Find Numbers with Even Number of Digits Easy C C++ 1298. Maximum Candies You Can Get from Boxes Hard C C++ 1299. Replace Elements with Greatest Element on Right Side Easy C C++ 1302. Deepest Leaves Sum Medium C++ 1304. Find N Unique Integers Sum up to Zero Easy C C++ 1305. All Elements in Two Binary Search Trees Medium C++ 1309. Decrypt String from Alphabet to Integer Mapping Easy C C++ 1310. XOR Queries of a Subarray Medium C C++ 1313. Decompress Run-Length Encoded List Easy C C++ 1314. Matrix Block Sum Medium C C++ 1315. Sum of Nodes with Even-Valued Grandparent Medium C++ 1317. Convert Integer to the Sum of Two No-Zero Integers Easy C C++ 1318. Minimum Flips to Make a OR b Equal to c Medium C C++ 1323. Maximum 69 Number Easy C C++ 1325. Delete Leaves With a Given Value Medium C++ 1329. Sort the Matrix Diagonally Medium C C++ 1331. Rank Transform of an Array Easy C C++ 1332. Remove Palindromic Subsequences Medium C C++ 1334. Find the City With the Smallest Number of Neighbors at a Threshold Distance Medium C C++ 1339. Maximum Product of Splitted Binary Tree Medium C++ 1337. The K Weakest Rows in a Matrix Easy C++ 1338. Reduce Array Size to The Half Medium C++ 1342. Number of Steps to Reduce a Number to Zero Easy C C++ 1343. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold Medium C C++ 1346. Check If N and Its Double Exist Easy C++ 1347. Minimum Number of Steps to Make Two Strings Anagram Medium C C++ 1348. Tweet Counts Per Frequency Medium C++ 1351. Count Negative Numbers in a Sorted Matrix Easy C C++ 1352. Product of the Last K Numbers Medium C++ 1353. Maximum Number of Events That Can Be Attended Medium C C++ 1356. Sort Integers by The Number of 1 Bits Easy C++ 1357. Apply Discount Every n Orders Medium C++ 1361. Validate Binary Tree Nodes Medium C C++ 1365. How Many Numbers Are Smaller Than the Current Number Easy C++ 1366. Rank Teams by Votes Medium C C++ 1367. Linked List in Binary Tree Medium C++ 1370. Increasing Decreasing String Easy C C++ 1371. Find the Longest Substring Containing Vowels in Even Counts Medium C C++ 1372. Longest ZigZag Path in a Binary Tree Medium C++ 1374. Generate a String With Characters That Have Odd Counts Easy C C++ 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree Medium C C++ 1380. Lucky Numbers in a Matrix Easy C C++ 1381. Design a Stack With Increment Operation Medium C++ 1382. Balance a Binary Search Tree Medium C++ 1385. Find the Distance Value Between Two Arrays Easy C C++ 1387. Sort Integers by The Power Value Medium C C++ 1394. Find Lucky Integer in an Array Easy C C++ 1389. Create Target Array in the Given Order Medium C C++ 1390. Four Divisors Medium C C++ 1395. Count Number of Teams Medium C C++ 1396. Design Underground System Medium C++ 1399. Count Largest Group Easy C++ 1402. Reducing Dishes Hard C C++ 1403. Minimum Subsequence in Non-Increasing Order Easy C C++ 1404. Number of Steps to Reduce a Number in Binary Representation to One Medium C C++ 1405. Longest Happy String Medium C C++ 1408. String Matching in an Array Easy C C++ 1409. Queries on a Permutation With Key Medium C C++ 1411. Number of Ways to Paint N × 3 Grid Hard C C++ 1415. The k-th Lexicographical String of All Happy Strings of Length n Medium C C++ 1418. Display Table of Food Orders in a Restaurant Medium C++ 1419. Minimum Number of Frogs Croaking Medium C C++ 1422. Maximum Score After Splitting a String Easy C C++ 1424. Diagonal Traverse II Medium C++ 1425. Constrained Subsequence Sum Hard C++ 1431. Kids With the Greatest Number of Candies Easy C C++ 1432. Max Difference You Can Get From Changing an Integer Medium C C++ 1433. Check If a String Can Break Another String Medium C C++ 1436. Destination City Easy C++ 1437. Check If All 1's Are at Least Length K Places Away Easy C C++ 1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit Medium C C++ 1441. Build an Array With Stack Operations Medium C++ 1442. Count Triplets That Can Form Two Arrays of Equal XOR Medium C C++ 1448. Count Good Nodes in Binary Tree Medium C++ 1450. Number of Students Doing Homework at a Given Time Easy C C++ 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence Easy C C++ 1457. Pseudo-Palindromic Paths in a Binary Tree Medium C++ 1458. Max Dot Product of Two Subsequences Hard C C++ 1460. Make Two Arrays Equal by Reversing Subarrays Easy C C++ 1462. Course Schedule IV Medium C C++ 1464. Maximum Product of Two Elements in an Array Easy C C++ 1470. Shuffle the Array Easy C C++ 1472. Design Browser History Medium C++ 1475. Final Prices With a Special Discount in a Shop Easy C C++ 1476. Subrectangle Queries Medium C++ 1480. Running Sum of 1d Array Easy C C++ 1481. Least Number of Unique Integers after K Removals Medium C++ 1482. Minimum Number of Days to Make m Bouquets Medium C C++ 1486. XOR Operation in an Array Easy C C++ 1488. Avoid Flood in The City Medium C++ 1492. The kth Factor of n Medium C C++ 1493. Longest Subarray of 1's After Deleting One Element Medium C C++ 1496. Path Crossing Easy C++ 1497. Check If Array Pairs Are Divisible by k Medium C C++ 1498. Number of Subsequences That Satisfy the Given Sum Condition Medium C C++ 1502. Can Make Arithmetic Progression From Sequence Easy C C++ 1503. Last Moment Before All Ants Fall Out of a Plank Medium C C++ 1507. Reformat Date Easy C C++ 1508. Range Sum of Sorted Subarray Sums Medium C C++ 1509. Minimum Difference Between Largest and Smallest Value in Three Moves Medium C C++ 1512. Number of Good Pairs Easy C C++ 1513. Number of Substrings With Only 1s Medium C C++ 1514. Path with Maximum Probability Medium C C++ 1518. Water Bottles Easy C C++ 1523. Count Odd Numbers in an Interval Range Easy C C++ 1524. Number of Sub-arrays With Odd Sum Medium C C++ 1525. Number of Good Ways to Split a String Medium C C++ 1526. Minimum Number of Increments on Subarrays to Form a Target Array Hard C C++ 1528. Shuffle String Easy C C++ 1529. Minimum Suffix Flips Medium C C++ 1530. Number of Good Leaf Nodes Pairs Medium C++ 1534. Count Good Triplets Easy C C++ 1535. Find the Winner of an Array Game Medium C C++ 1544. Make The String Great Easy C C++ 1545. Find Kth Bit in Nth Binary String Medium C C++ 1550. Three Consecutive Odds Easy C C++ 1551. Minimum Operations to Make Array Equal Medium C C++ 1552. Magnetic Force Between Two Balls Medium C C++ 1557. Minimum Number of Vertices to Reach All Nodes Medium C C++ 1561. Maximum Number of Coins You Can Get Medium C C++ 1563. Stone Game V Hard C C++ 1566. Detect Pattern of Length M Repeated K or More Times Easy C C++ 1572. Matrix Diagonal Sum Easy C C++ 1574. Shortest Subarray to be Removed to Make Array Sorted Medium C C++ 1578. Minimum Time to Make Rope Colorful Medium C++ 1579. Remove Max Number of Edges to Keep Graph Fully Traversable Hard C C++ 1582. Special Positions in a Binary Matrix Easy C C++ 1588. Sum of All Odd Length Subarrays Easy C C++ 1590. Make Sum Divisible by P Medium C++ 1593. Split a String Into the Max Number of Unique Substrings Medium C++ 1598. Crawler Log Folder Easy C C++ 1600. Throne Inheritance Medium C++ 1603. Design Parking System Easy C++ 1605. Find Valid Matrix Given Row and Column Sums Medium C C++ 1608. Special Array With X Elements Greater Than or Equal X Easy C C++ 1609. Even Odd Tree Medium C++ 1611. Minimum One Bit Operations to Make Integers Zero Hard C C++ 1614. Maximum Nesting Depth of the Parentheses Easy C++ C 1619. Mean of Array After Removing Some Elements Easy C C++ 1624. Largest Substring Between Two Equal Characters Easy C C++ 1625. Lexicographically Smallest String After Applying Operations Medium C++ 1627. Graph Connectivity With Threshold Hard C C++ 1630. Arithmetic Subarrays Medium C C++ 1636. Sort Array by Increasing Frequency Easy C C++ 1637. Widest Vertical Area Between Two Points Containing No Points Medium C C++ 1638. Count Substrings That Differ by One Character Medium C C++ 1639. Number of Ways to Form a Target String Given a Dictionary Hard C C++ 1641. Count Sorted Vowel Strings Medium C C++ 1642. Furthest Building You Can Reach Medium C++ 1652. Defuse the Bomb Medium C C++ 1653. Minimum Deletions to Make String Balanced Medium C C++ 1656. Design an Ordered Stream Easy C++ 1657. Determine if Two Strings Are Close Medium C C++ 1658. Minimum Operations to Reduce X to Zero Medium C++ 1662. Check If Two String Arrays are Equivalent Easy C C++ 1663. Smallest String With A Given Numeric Value Medium C C++ 1668. Maximum Repeating Substring Easy C C++ 1669. Merge In Between Linked Lists Medium C++ 1671. Minimum Number of Removals to Make Mountain Array Hard C++ 1672. Richest Customer Wealth Easy C C++ 1678. Goal Parser Interpretation Easy C C++ 1684. Count the Number of Consistent Strings Easy C++ 1685. Sum of Absolute Differences in a Sorted Array Medium C C++ 1686. Stone Game VI Medium C C++ 1688. Count of Matches in Tournament Easy C C++ 1689. Partitioning Into Minimum Number Of Deci-Binary Numbers Medium C C++ 1690. Stone Game VII Medium C C++ 1695. Maximum Erasure Value Medium C C++ 1700. Number of Students Unable to Eat Lunch Easy C C++ 1701. Average Waiting Time Medium C C++ 1704. Determine if String Halves Are Alike Easy C C++ 1706. Where Will the Ball Fall Medium C C++ 1710. Maximum Units on a Truck Easy C C++ 1716. Calculate Money in Leetcode Bank Easy C C++ 1717. Maximum Score From Removing Substrings Medium C C++ 1718. Construct the Lexicographically Largest Valid Sequence Medium C C++ 1720. Decode XORed Array Easy C C++ 1721. Swapping Nodes in a Linked List Medium C++ 1723. Find Minimum Time to Finish All Jobs Hard C++ 1725. Number Of Rectangles That Can Form The Largest Square Easy C C++ 1726. Tuple with Same Product Medium C C++ 1727. Largest Submatrix With Rearrangements Medium C C++ 1732. Find the Highest Altitude Easy C C++ 1733. Minimum Number of People to Teach Medium C C++ 1742. Maximum Number of Balls in a Box Easy C C++ 1743. Restore the Array From Adjacent Pairs Medium C++ 1748. Sum of Unique Elements Easy C C++ 1749. Maximum Absolute Sum of Any Subarray Medium C C++ 1750. Minimum Length of String After Deleting Similar Ends Medium C C++ 1751. Maximum Number of Events That Can Be Attended II Hard C C++ 1752. Check if Array Is Sorted and Rotated Easy C C++ 1753. Maximum Score From Removing Stones Medium C C++ 1758. Minimum Changes To Make Alternating Binary String Easy C C++ 1759. Count Number of Homogenous Substrings Medium C C++ 1760. Minimum Limit of Balls in a Bag Medium C C++ 1765. Map of Highest Peak Medium C C++ 1768. Merge Strings Alternately Easy C C++ 1769. Minimum Number of Operations to Move All Balls to Each Box Medium C C++ 1770. Maximum Score from Performing Multiplication Operations Hard C C++ 1773. Count Items Matching a Rule Easy C C++ 1779. Find Nearest Point That Has the Same X or Y Coordinate Easy C C++ 1780. Check if Number is a Sum of Powers of Three Medium C C++ 1781. Sum of Beauty of All Substrings Medium C C++ 1790. Check if One String Swap Can Make Strings Equal Easy C C++ 1791. Find Center of Star Graph Easy C C++ 1792. Maximum Average Pass Ratio Medium C++ 1793. Maximum Score of a Good Subarray Hard C C++ 1798. Maximum Number of Consecutive Values You Can Make Medium C C++ 1800. Maximum Ascending Subarray Sum Easy C C++ 1812. Determine Color of a Chessboard Square Easy C C++ 1813. Sentence Similarity III Medium C C++ 1814. Count Nice Pairs in an Array Medium C++ 1816. Truncate Sentence Easy C C++ 1817. Finding the Users Active Minutes Medium C C++ 1823. Find the Winner of the Circular Game Medium C C++ 1827. Minimum Operations to Make the Array Increasing Easy C C++ 1828. Queries on Number of Points Inside a Circle Medium C C++ 1829. Maximum XOR for Each Query Medium C C++ 1832. Check if the Sentence Is Pangram Easy C C++ 1833. Maximum Ice Cream Bars Medium C C++ 1837. Sum of Digits in Base K Easy C C++ 1838. Frequency of the Most Frequent Element Medium C++ 1844. Replace All Digits with Characters Easy C C++ 1845. Seat Reservation Manager Medium C++ 1846. Maximum Element After Decreasing and Rearranging Medium C C++ 1859. Sorting the Sentence Easy C C++ 1860. Incremental Memory Leak Medium C C++ 1861. Rotating the Box Medium C C++ 1863. Sum of All Subset XOR Totals Easy C C++ 1865. Finding Pairs With a Certain Sum Medium C++ 1876. Substrings of Size Three with Distinct Characters Easy C C++ 1877. Minimize Maximum Pair Sum in Array Medium C++ C++ 1880. Check if Word Equals Summation of Two Words Easy C C++ 1884. Egg Drop With 2 Eggs and N Floors Medium C C++ 1887. Reduction Operations to Make the Array Elements Equal Medium C C++ 1888. Minimum Number of Flips to Make the Binary String Alternating Medium C C++ 1893. Check if All the Integers in a Range Are Covered Easy C C++ 1894. Find the Student that Will Replace the Chalk Medium C C++ 1895. Largest Magic Square Medium C C++ 1897. Redistribute Characters to Make All Strings Equal Easy C C++ 1899. Merge Triplets to Form Target Triplet Medium C C++ 1903. Largest Odd Number in String Easy C C++ 1904. The Number of Full Rounds You Have Played Medium C C++ 1905. Count Sub Islands Medium C C++ 1906. Minimum Absolute Difference Queries Medium C C++ 1909. Remove One Element to Make the Array Strictly Increasing Easy C C++ 1910. Remove All Occurrences of a Substring Medium C C++ 1913. Maximum Product Difference Between Two Pairs Easy C C++ 1915. Number of Wonderful Substrings Medium C C++ 1920. Build Array from Permutation Easy C C++ 1921. Eliminate Maximum Number of Monsters Medium C C++ 1922. Count Good Numbers Medium C C++ 1925. Count Square Sum Triples Easy C C++ 1929. Concatenation of Array Easy C C++ 1930. Unique Length-3 Palindromic Subsequences Medium C C++ 1935. Maximum Number of Words You Can Type Easy C C++ 1936. Add Minimum Number of Rungs Medium C C++ 1937. Maximum Number of Points with Cost Medium C C++ 1941. Check if All Characters Have Equal Number of Occurrences Easy C C++ 1942. The Number of the Smallest Unoccupied Chair Medium C++ 1944. Number of Visible People in a Queue Hard C C++ 1945. Sum of Digits of String After Convert Easy C C++ 1957. Delete Characters to Make Fancy String Easy C C++ 1963. Minimum Number of Swaps to Make the String Balanced Medium C C++ 1967. Number of Strings That Appear as Substrings in Word Easy C C++ 1970. Last Day Where You Can Still Cross Hard C++ 1971. Find if Path Exists in Graph Easy C C++ 1974. Minimum Time to Type Word Using Special Typewriter Easy C C++ 1975. Maximum Matrix Sum Medium C C++ 1976. Number of Ways to Arrive at Destination Medium C++ 1979. Find Greatest Common Divisor of Array Easy C C++ 1980. Find Unique Binary String Medium C++ 1991. Find the Middle Index in Array Easy C C++ 1992. Find All Groups of Farmland Medium C C++ 1995. Count Special Quadruplets Easy C C++ 2000. Reverse Prefix of Word Easy C C++ 2001. Number of Pairs of Interchangeable Rectangles Medium C C++ 2006. Count Number of Pairs With Absolute Difference K Easy C C++ 2009. Minimum Number of Operations to Make Array Continuous Hard C++ 2016. Maximum Difference Between Increasing Elements Easy C C++ 2011. Final Value of Variable After Performing Operations Easy C C++ 2017. Grid Game Medium C C++ 2018. Check if Word Can Be Placed In Crossword Medium C C++ 2022. Convert 1D Array Into 2D Array Medium C C++ 2023. Number of Pairs of Strings With Concatenation Equal to Target Medium C C++ 2024. Maximize the Confusion of an Exam Medium C C++ 2028. Find Missing Observations Medium C C++ 2032. Two Out of Three Easy C C++ 2033. Minimum Operations to Make a Uni-Value Grid Medium C C++ 2037. Minimum Number of Moves to Seat Everyone Easy C C++ 2038. Remove Colored Pieces if Both Neighbors are the Same Color Medium C C++ 2042. Check if Numbers Are Ascending in a Sentence Easy C C++ 2043. Simple Bank System Medium C++ 2044. Count Number of Maximum Bitwise-OR Subsets Medium C C++ 2048. Next Greater Numerically Balanced Number Medium C C++ 2050. Parallel Courses III Hard C++ 2053. Kth Distinct String in an Array Easy C++ 2054. Two Best Non-Overlapping Events Medium C C++ 2057. Smallest Index With Equal Value Easy C C++ 2058. Find the Minimum and Maximum Number of Nodes Between Critical Points Medium C++ 2062. Count Vowel Substrings of a String Easy C C++ 2064. Minimized Maximum of Products Distributed to Any Store Medium C C++ 2070. Most Beautiful Item for Each Query Medium C C++ 2071. Maximum Number of Tasks You Can Assign Hard C C++ 2073. Time Needed to Buy Tickets Easy C C++ 2079. Watering Plants Medium C C++ 2081. Sum of k-Mirror Numbers Hard C C++ 2085. Count Common Words With One Occurrence Easy C++ 2089. Find Target Indices After Sorting Array Easy C C++ 2092. Find All People With Secret Hard C C++ 2094. Finding 3-Digit Even Numbers Easy C C++ 2096. Step-By-Step Directions From a Binary Tree Node to Another Medium C++ 2099. Find Subsequence of Length K With the Largest Sum Easy C C++ 2103. Rings and Rods Easy C C++ 2108. Find First Palindromic String in the Array Easy C C++ 2109. Adding Spaces to a String Medium C C++ 2110. Number of Smooth Descent Periods of a Stock Medium C C++ 2114. Maximum Number of Words Found in Sentences Easy C C++ 2115. Find All Possible Recipes from Given Supplies Medium C++ 2116. Check if a Parentheses String Can Be Valid Medium C++ 2119. A Number After a Double Reversal Easy C C++ 2120. Execution of All Suffix Instructions Staying in a Grid Medium C C++ 2124. Check if All A's Appears Before All B's Easy C C++ 2125. Number of Laser Beams in a Bank Medium C C++ 2129. Capitalize the Title Easy C++ 2130. Maximum Twin Sum of a Linked List Medium C++ 2131. Longest Palindrome by Concatenating Two Letter Words Medium C++ 2134. Minimum Swaps to Group All 1's Together II Medium C C++ 2135. Count Words Obtained After Adding a Letter Medium C C++ 2136. Earliest Possible Day of Full Bloom Hard C C++ 2138. Divide a String Into Groups of Size k Easy C++ 2140. Solving Questions With Brainpower Medium C C++ 2141. Maximum Running Time of N Computers Hard C C++ 2144. Minimum Cost of Buying Candies With Discount Easy C C++ 2145. Count the Hidden Sequences Medium C C++ 2147. Number of Ways to Divide a Long Corridor Hard C C++ 2149. Rearrange Array Elements by Sign Medium C C++ 2154. Keep Multiplying Found Values by Two Easy C C++ 2160. Minimum Sum of Four Digit Number After Splitting Digits Easy C C++ 2161. Partition Array According to Given Pivot Medium C C++ 2165. Smallest Value of the Rearranged Number Medium C C++ 2169. Count Operations to Obtain Zero Easy C C++ 2170. Minimum Operations to Make the Array Alternating Medium C++ 2176. Count Equal and Divisible Pairs in an Array Easy C C++ 2179. Count Good Triplets in an Array Hard C C++ 2180. Count Integers With Even Digit Sum Easy C C++ 2181. Merge Nodes in Between Zeros Medium C++ 2182. Construct String With Repeat Limit Medium C C++ 2185. Counting Words With a Given Prefix Easy C C++ 2191. Sort the Jumbled Numbers Medium C C++ 2192. All Ancestors of a Node in a Directed Acyclic Graph Medium C++ 2194. Cells in a Range on an Excel Sheet Easy C C++ 2196. Create Binary Tree From Descriptions Medium C++ 2197. Replace Non-Coprime Numbers in Array Hard C++ 2200. Find All K-Distant Indices in an Array Easy C C++ 2206. Divide Array Into Equal Pairs Easy C C++ 2210. Count Hills and Valleys in an Array Easy C C++ 2211. Count Collisions on a Road Medium C C++ 2215. Find the Difference of Two Arrays Easy C C++ 2216. Minimum Deletions to Make Array Beautiful Medium C C++ 2220. Minimum Bit Flips to Convert Number Easy C C++ 2221. Find Triangular Sum of an Array Medium C C++ 2225. Find Players With Zero or One Losses Medium C++ 2232. Minimize Result by Adding Parentheses to Expression Medium C C++ 2235. Add Two Integers Easy C C++ 2236. Root Equals Sum of Children Easy C++ 2248. Intersection of Multiple Arrays Easy C C++ 2251. Number of Flowers in Full Bloom Hard C++ 2255. Count Prefixes of a Given String Easy C C++ 2257. Count Unguarded Cells in the Grid Medium C C++ 2264. Largest 3-Same-Digit Number in String Easy C C++ 2226. Maximum Candies Allocated to K Children Medium C C++ 2270. Number of Ways to Split Array Medium C C++ 2275. Largest Combination With Bitwise AND Greater Than Zero Medium C C++ 2278. Percentage of Letter in String Easy C C++ 2279. Maximum Bags With Full Capacity of Rocks Medium C C++ 2283. Check if Number Has Equal Digit Count and Digit Value Easy C C++ 2285. Maximum Total Importance of Roads Medium C C++ 2290. Minimum Obstacle Removal to Reach Corner Hard C++ 2294. Partition Array Such That Maximum Difference Is K Medium C C++ 2300. Successful Pairs of Spells and Potions Medium C C++ 2302. Count Subarrays With Score Less Than K Hard C C++ 2303. Calculate Amount Paid in Taxes Easy C C++ 2305. Fair Distribution of Cookies Medium C C++ 2309. Greatest English Letter in Upper and Lower Case Easy C C++ 2311. Longest Binary Subsequence Less Than or Equal to K Medium C C++ 2315. Count Asterisks Easy C C++ 2317. Maximum XOR After Operations Medium C C++ 2325. Decode the Message Easy C C++ 2326. Spiral Matrix IV Medium C++ 2327. Number of People Aware of a Secret Medium C C++ 2331. Evaluate Boolean Binary Tree Easy C++ 2337. Move Pieces to Obtain a String Medium C C++ 2341. Maximum Number of Pairs in Array Easy C C++ 2342. Max Sum of a Pair With Equal Sum of Digits Medium C C++ 2347. Best Poker Hand Easy C C++ 2348. Number of Zero-Filled Subarrays Medium C C++ 2350. Shortest Impossible Sequence of Rolls Hard C C++ 2351. First Letter to Appear Twice Easy C C++ 2352. Equal Row and Column Pairs Medium C C++ 2353. Design a Food Rating System Medium C++ 2363. Merge Similar Items Easy C C++ 2357. Make Array Zero by Subtracting Equal Amounts Easy C C++ 2358. Maximum Number of Groups Entering a Competition Medium C C++ 2359. Find Closest Node to Given Two Nodes Medium C C++ 2364. Count Number of Bad Pairs Medium C C++ 2367. Number of Arithmetic Triplets Easy C C++ 2370. Longest Ideal Subsequence Medium C C++ 2373. Largest Local Values in a Matrix Easy C C++ 2375. Construct Smallest Number From DI String Medium C C++ 2379. Minimum Recolors to Get K Consecutive Black Blocks Easy C C++ 2380. Time Needed to Rearrange a Binary String Medium C++ 2381. Shifting Letters II Medium C C++ 2385. Amount of Time for Binary Tree to Be Infected Medium C++ 2389. Longest Subsequence With Limited Sum Medium C C++ 2390. Removing Stars From a String Medium C C++ 2391. Minimum Amount of Time to Collect Garbage Medium C C++ 2396. Strictly Palindromic Number Medium C C++ 2399. Check Distances Between Same Letters Easy C C++ 2938. Separate Black and White Balls Medium C++ 2942. Find Words Containing Character Easy C C++ 2943. Maximize Area of Square Hole in Grid Medium C++ 2401. Longest Nice Subarray Medium C C++ 2402. Meeting Rooms III Hard C C++ 2405. Optimal Partition of String Medium C C++ 2406. Divide Intervals Into Minimum Number of Groups Medium C C++ 2410. Maximum Matching of Players With Trainers Medium C C++ 2411. Smallest Subarrays With Maximum Bitwise OR Medium C C++ 2413. Smallest Even Multiple Easy C C++ 2415. Reverse Odd Levels of Binary Tree Medium C++ 2416. Sum of Prefix Scores of Strings Hard C C++ 2418. Sort the People Easy C C++ 2419. Longest Subarray With Maximum Bitwise AND Medium C C++ 2423. Remove Letter To Equalize Frequency Easy C C++ 2424. Longest Uploaded Prefix Medium C++ 2425. Bitwise XOR of All Pairings Medium C C++ 2427. Number of Common Factors Medium C C++ 2428. Maximum Sum of an Hourglass Medium C C++ 2429. Minimize XOR Medium C C++ 2433. Find The Original Array of Prefix Xor Medium C++ 2434. Using a Robot to Print the Lexicographically Smallest String Medium C C++ 2435. Paths in Matrix Whose Sum Is Divisible by K Hard C C++ 2441. Largest Positive Integer That Exists With Its Negative Easy C C++ 2442. Count Number of Distinct Integers After Reverse Operations Medium C C++ 2444. Count Subarrays With Fixed Bounds Hard C C++ 2460. Apply Operations to an Array Easy C C++ 2461. Maximum Sum of Distinct Subarrays With Length K Medium C C++ 2463. Minimum Total Distance Traveled Hard C++ 2466. Count Ways To Build Good Strings Medium C C++ 2467. Most Profitable Path in a Tree Medium C C++ 2469. Convert the Temperature Easy C C++ 2475. Number of Unequal Triplets in Array Easy C C++ 2481. Minimum Cuts to Divide a Circle Easy C C++ 2482. Difference Between Ones and Zeros in Row and Column Medium C C++ 2483. Minimum Penalty for a Shop Medium C C++ 2485. Find the Pivot Integer Easy C C++ 2486. Append Characters to String to Make Subsequence Medium C C++ 2487. Remove Nodes From Linked List Medium C++ 2490. Circular Sentence Easy C C++ 2491. Divide Players Into Teams of Equal Skill Medium C C++ 2493. Divide Nodes Into the Maximum Number of Groups Hard C++ 2496. Maximum Value of a String in an Array Easy C C++ 2497. Maximum Star Sum of a Graph Medium C++ 2500. Delete Greatest Value in Each Row Easy C C++ 2501. Longest Square Streak in an Array Medium C C++ 2503. Maximum Number of Points From Grid Queries Hard C C++ 2506. Count Pairs Of Similar Strings Easy C++ 2511. Maximum Enemy Forts That Can Be Captured Easy C C++ 2516. Take K of Each Character From Left and Right Medium C++ 2517. Maximum Tastiness of Candy Basket Medium C++ 2520. Count the Digits That Divide a Number Easy C C++ 2523. Closest Prime Numbers in Range Medium C C++ 2525. Categorize Box According to Criteria Easy C C++ 2527. Find Xor-Beauty of Array Medium C C++ 2528. Maximize the Minimum Powered City Hard C C++ 2529. Maximum Count of Positive Integer and Negative Integer Easy C C++ 2530. Maximal Score After Applying K Operations Medium C++ 2531. Make Number of Distinct Characters Equal Medium C C++ 2535. Difference Between Element Sum and Digit Sum of an Array Easy C C++ 2536. Increment Submatrices by One Medium C C++ 2537. Count the Number of Good Subarrays Medium C++ 2540. Minimum Common Value Easy C C++ 2544. Alternating Digit Sum Easy C C++ 2545. Sort the Students by Their Kth Score Medium C C++ 2349. Design a Number Container System Medium C++ 2551. Put Marbles in Bags Hard C C++ 2553. Separate the Digits in an Array Easy C C++ 2554. Maximum Number of Integers to Choose From a Range I Medium C C++ 2558. Take Gifts From the Richest Pile Easy C++ 2559. Count Vowel Strings in Ranges Medium C C++ 2560. House Robber IV Medium C C++ 2562. Find the Array Concatenation Value Easy C C++ 2563. Count the Number of Fair Pairs Medium C C++ 2566. Maximum Difference by Remapping a Digit Easy C C++ 2570. Merge Two 2D Arrays by Summing Values Easy C C++ 2574. Left and Right Sum Differences Easy C C++ 2577. Minimum Time to Visit a Cell In a Grid Hard C++ 2578. Split With Minimum Sum Easy C C++ 2579. Count Total Number of Colored Cells Medium C C++ 2582. Pass the Pillow Easy C C++ 2583. Kth Largest Sum in a Binary Tree Medium C++ 2586. Count the Number of Vowel Strings in Range Easy C C++ 2593. Find Score of an Array After Marking All Elements Medium C C++ 2594. Minimum Time to Repair Cars Medium C C++ 2595. Number of Even and Odd Bits Medium C C++ 2597. The Number of Beautiful Subsets Medium C C++ 2598. Smallest Missing Non-negative Integer After Operations Medium C C++ 2601. Prime Subtraction Operation Medium C C++ 2605. Form Smallest Number From Two Digit Arrays Easy C C++ 2610. Convert an Array Into a 2D Array With Conditions Medium C++ 2616. Minimize the Maximum Difference of Pairs Medium C C++ 2639. Find the Width of Columns of a Grid Easy C C++ 2640. Find the Score of All Prefixes of an Array Medium C C++ 2641. Cousins in Binary Tree II Medium C++ 2642. Design Graph With Shortest Path Calculator Hard C++ 2643. Row With Maximum Ones Easy C C++ 2651. Calculate Delayed Arrival Time Easy C C++ 2652. Sum Multiples Easy C C++ 2654. Minimum Number of Operations to Make All Array Elements Equal to 1 Medium C C++ 2656. Maximum Sum With Exactly K Elements Easy C C++ 2657. Find the Prefix Common Array of Two Arrays Medium C C++ 2658. Maximum Number of Fish in a Grid Medium C C++ 2661. First Completely Painted Row or Column Medium C C++ 2670. Find the Distinct Difference Array Easy C C++ 2678. Number of Senior Citizens Easy C C++ 2683. Neighboring Bitwise XOR Medium C C++ 2684. Maximum Number of Moves in a Grid Medium C C++ 2685. Count the Number of Complete Components Medium C++ 2696. Minimum String Length After Removing Substrings Easy C C++ 2697. Lexicographically Smallest Palindrome Easy C C++ 2698. Find the Punishment Number of an Integer Medium C C++ 2706. Buy Two Chocolates Easy C C++ 2707. Extra Characters in a String Medium C C++ 2710. Remove Trailing Zeros From a String Easy C C++ 2711. Difference of Number of Distinct Values on Diagonals Medium C++ 2716. Minimize String Length Easy C C++ 2733. Neither Minimum nor Maximum Easy C C++ 2742. Painting the Walls Hard C++ 2744. Find Maximum Number of String Pairs Easy C C++ 2747. Count Zero Request Servers Medium C C++ 2748. Number of Beautiful Pairs Easy C C++ 2749. Minimum Operations to Make the Integer Zero Medium C C++ 2751. Robot Collisions Hard C C++ 2762. Continuous Subarrays Medium C C++ 2769. Find the Maximum Achievable Number Easy C C++ 2770. Maximum Number of Jumps to Reach the Last Index Medium C C++ 2778. Sum of Squares of Special Elements Easy C C++ 2779. Maximum Beauty of an Array After Applying Operation Medium C C++ 2780. Minimum Index of a Valid Split Medium C C++ 2785. Sort Vowels in a String Medium C C++ 2788. Split Strings by Separator Easy C C++ 2798. Number of Employees Who Met the Target Easy C C++ 2799. Count Complete Subarrays in an Array Medium C C++ 2807. Insert Greatest Common Divisors in Linked List Medium C++ 2810. Faulty Keyboard Easy C C++ 2812. Find the Safest Path in a Grid Medium C++ 2816. Double a Number Represented as a Linked List Medium C++ 2818. Apply Operations to Maximize Score Hard C++ 2824. Count Pairs Whose Sum is Less than Target Easy C C++ 2825. Make String a Subsequence Using Cyclic Increments Medium C C++ 2828. Check if a String Is an Acronym of Words Easy C++ 2843. Count Symmetric Integers Easy C C++ 2848. Points That Intersect With Cars Easy C C++ 2845. Count of Interesting Subarrays Medium C++ 2849. Determine if a Cell Is Reachable at a Given Time Medium C C++ 2859. Sum of Values at Indices With K Set Bits Easy C C++ 2864. Maximum Odd Binary Number Easy C C++ 2870. Minimum Number of Operations to Make Array Empty Medium C++ 2872. Maximum Number of K-Divisible Components Hard C C++ 2873. Maximum Value of an Ordered Triplet I Easy C C++ 2874. Maximum Value of an Ordered Triplet II Medium C C++ 2894. Divisible and Non-divisible Sums Difference Easy C C++ 2895. Minimum Processing Time Medium C C++ 2900. Longest Unequal Adjacent Groups Subsequence I Easy C C++ 2901. Longest Unequal Adjacent Groups Subsequence II Medium C C++ 2908. Minimum Sum of Mountain Triplets I Easy C++ 2913. Subarrays Distinct Element Sum of Squares I Easy C C++ 2914. Minimum Number of Changes to Make Binary String Beautiful Medium C C++ 2917. Find the K-or of an Array Easy C C++ 2918. Minimum Equal Sum of Two Arrays After Replacing Zeros Medium C C++ 2923. Find Champion I Easy C C++ 2924. Find Champion II Medium C C++ 2928. Distribute Candies Among Children I Easy C C++ 2932. Maximum Strong Pair XOR I Easy C C++ 2938. Separate Black and White Balls Medium C++ 2940. Find Building Where Alice and Bob Can Meet Hard C C++ 2948. Make Lexicographically Smallest Array by Swapping Elements Medium C C++ 2951. Find the Peaks Easy C C++ 2956. Find Common Elements Between Two Arrays Easy C C++ 2958. Length of Longest Subarray With at Most K Frequency Medium C++ 2960. Count Tested Devices After Test Operations Easy C C++ 2962. Count Subarrays Where Max Element Appears at Least K Times Medium C C++ 2965. Find Missing and Repeated Values Easy C C++ 2966. Divide Array Into Arrays With Max Difference Medium C C++ 2971. Find Polygon With the Largest Perimeter Medium C C++ 2974. Minimum Number Game Easy C C++ 2980. Check if Bitwise OR Has Trailing Zeros Easy C C++ 2981. Find Longest Special Substring That Occurs Thrice I Medium C C++ 2997. Minimum Number of Operations to Make Array XOR Equal to K Medium C C++ 2998. Minimum Number of Operations to Make X and Y Equal Medium C C++ 2999. Count the Number of Powerful Integers Medium C C++ 3000. Maximum Area of Longest Diagonal Rectangle Easy C C++ 3005. Count Elements With Maximum Frequency Easy C++ 3007. Maximum Number That Sum of the Prices Is Less Than or Equal to K Medium C C++ 3010. Divide an Array Into Subarrays With Minimum Cost I Easy C C++ 3011. Find if Array Can Be Sorted Medium C C++ 3016. Minimum Number of Pushes to Type Word II Medium C C++ 3019. Number of Changing Keys Easy C C++ 3021. Alice and Bob Playing Flower Game Medium C C++ 3024. Type of Triangle Easy C C++ 3025. Find the Number of Ways to Place People I Medium C C++ 3027. Find the Number of Ways to Place People II Hard C C++ 3028. Ant on the Boundary Easy C C++ 3033. Modify the Matrix Easy C C++ 3042. Count Prefix and Suffix Pairs I Easy C C++ 3043. Find the Length of the Longest Common Prefix Medium C++ 3046. Split the Array Easy C C++ 3065. Minimum Operations to Exceed Threshold Value I Easy C C++ 3066. Minimum Operations to Exceed Threshold Value II Medium C++ 3068. Find the Maximum Sum of Node Values Hard C C++ 3069. Distribute Elements Into Two Arrays I Easy C C++ 3074. Apple Redistribution into Boxes Easy C C++ 3075. Maximize Happiness of Selected Children Medium C C++ 3079. Find the Sum of Encrypted Integers Easy C C++ 3085. Minimum Deletions to Make String K-Special Medium C C++ 3097. Shortest Subarray With OR at Least K II Medium C C++ 3099. Harshad Number Easy C C++ 3100. Water Bottles II Medium C C++ 3105. Longest Strictly Increasing or Strictly Decreasing Subarray Easy C C++ 3108. Minimum Cost Walk in Weighted Graph Hard C C++ 3110. Score of a String Easy C C++ 3131. Find the Integer Added to Array I Easy C C++ 3133. Minimum Array End Medium C C++ 3136. Valid Word Easy C C++ 3137. Minimum Number of Operations to Make Word K-Periodic Medium C++ 3146. Permutation Difference between Two Strings Easy C C++ 3147. Taking Maximum Energy From the Mystic Dungeon Medium C C++ 3151. Special Array I Easy C C++ 3152. Special Array II Medium C++ 3158. Find the XOR of Numbers Which Appear Twice Easy C C++ 3159. Find Occurrences of an Element in an Array Medium C C++ 3160. Find the Number of Distinct Colors Among the Balls Medium C++ 3162. Find the Number of Good Pairs I Easy C C++ 3174. Clear Digits Easy C C++ 3163. String Compression III Medium C C++ 3168. Minimum Number of Chairs in a Waiting Room Easy C C++ 3169. Count Days Without Meetings Medium C C++ 3170. Lexicographically Minimum String After Removing Stars Medium C C++ 3184. Count Pairs That Form a Complete Day I Easy C C++ 3186. Maximum Total Damage With Spell Casting Medium C C++ 3190. Find Minimum Operations to Make All Elements Divisible by Three Easy C C++ 3191. Minimum Operations to Make Binary Array Elements Equal to One I Medium C C++ 3194. Minimum Average of Smallest and Largest Elements Easy C C++ 3195. Find the Minimum Area to Cover All Ones I Medium C C++ 3201. Find the Maximum Length of Valid Subsequence I Medium C C++ 3202. Find the Maximum Length of Valid Subsequence II Medium C C++ 3206. Alternating Groups I Easy C C++ 3208. Alternating Groups II Medium C C++ 3211. Generate Binary Strings Without Adjacent Zeros Medium C C++ 3217. Delete Nodes From Linked List Present in Array Medium C++ 3223. Minimum Length of String After Operations Medium C C++ 3227. Vowels Game in a String Medium C C++ 3228. Maximum Number of Operations to Move Ones to the End Medium C C++ 3232. Find if Digit Game Can Be Won Easy C C++ 3239. Minimum Number of Flips to Make Binary Grid Palindromic I Medium C C++ 3242. Design Neighbor Sum Service Easy C++ 3243. Shortest Distance After Road Addition Queries I Medium C++ 3248. Snake in Matrix Easy C C++ 3254. Find the Power of K-Size Subarrays I Medium C C++ 3258. Count Substrings That Satisfy K-Constraint I Easy C C++ 3264. Final Array State After K Multiplication Operations I Easy C C++ 3270. Find the Key of the Numbers Easy C C++ 3271. Hash Divided String Medium C C++ 3272. Find the Count of Good Integers Hard C++ 3274. Check if Two Chessboard Squares Have the Same Color Easy C C++ 3280. Convert Date to Binary Easy C C++ 3285. Find Indices of Stable Mountains Easy C C++ 3289. The Two Sneaky Numbers of Digitville Easy C C++ 3300. Minimum Element After Replacement With Digit Sum Easy C++ 3304. Find the K-th Character in String Game I Easy C C++ 3307. Find the K-th Character in String Game II Hard C C++ 3314. Construct the Minimum Bitwise Array I Easy C C++ 3318. Find X-Sum of All K-Long Subarrays I Easy C C++ 3324. Find the Sequence of Strings Appeared on the Screen Medium C C++ 3330. Find the Original Typed String I Easy C C++ 3335. Total Characters in String After Transformations I Medium C C++ 3337. Total Characters in String After Transformations II Hard C++ 3340. Check Balanced String Easy C C++ 3341. Find Minimum Time to Reach Last Room I Medium C C++ 3342. Find Minimum Time to Reach Last Room II Medium C C++ 3343. Count Number of Balanced Permutations Hard C++ 3346. Maximum Frequency of an Element After Performing Operations I Medium C C++ 3347. Maximum Frequency of an Element After Performing Operations II Hard C C++ 3349. Adjacent Increasing Subarrays Detection I Easy C C++ 3350. Adjacent Increasing Subarrays Detection II Medium C C++ 3354. Make Array Elements Equal to Zero Easy C C++ 3355. Zero Array Transformation I Medium C C++ 3356. Zero Array Transformation II Medium C C++ 3362. Zero Array Transformation III Medium C C++ 3370. Smallest Number With All Set Bits Easy C C++ 3375. Minimum Operations to Make Array Values Equal to K Easy C C++ 3381. Maximum Subarray Sum With Length Divisible by K Medium C C++ 3392. Count Subarrays of Length Three With a Condition Easy C C++ 3405. Count the Number of Arrays with K Matching Adjacent Elements Hard C C++ 3396. Minimum Number of Operations to Make Elements in Array Distinct Easy C C++ 3397. Maximum Number of Distinct Elements After Operations Medium C C++ 3402. Minimum Operations to Make Columns Strictly Increasing Easy C C++ 3403. Find the Lexicographically Largest String From the Box I Medium C C++ 3408. Design Task Manager Medium C++ 3423. Maximum Difference Between Adjacent Elements in a Circular Array Easy C C++ 3427. Sum of Variable Length Subarrays Easy C C++ 3432. Count Partitions with Even Sum Difference Easy C C++ 3439. Reschedule Meetings for Maximum Free Time I Medium C C++ 3440. Reschedule Meetings for Maximum Free Time II Medium C C++ 3442. Maximum Difference Between Even and Odd Frequency I Easy C C++ 3443. Maximum Manhattan Distance After K Changes Medium C C++ 3445. Maximum Difference Between Even and Odd Frequency II Hard C C++ 3446. Sort Matrix by Diagonals Medium C C++ 3452. Sum of Good Numbers Easy C C++ 3453. Separate Squares I Medium C C++ 3461. Check If Digits Are Equal in String After Operations I Easy C C++ 3467. Transform Array by Parity Easy C C++ 3477. Fruits Into Baskets II Easy C C++ 3483. Unique 3-Digit Even Numbers Easy C C++ 3484. Design Spreadsheet Medium C++ 3487. Maximum Unique Subarray Sum After Deletion Easy C++ 3492. Maximum Containers on a Ship Easy C C++ 3494. Find the Minimum Amount of Time to Brew Potions Medium C C++ 3498. Reverse Degree of a String Easy C C++ 3502. Minimum Cost to Reach Every Position Easy C C++ 3508. Implement Router Medium C++ 3512. Minimum Operations to Make Array Sum Divisible by K Easy C C++ 3516. Find Closest Person Easy C C++ 3527. Find the Most Common Response Medium C++ 3531. Count Covered Buildings Medium C C++ 3536. Maximum Product of Two Digits Easy C C++ 3537. Fill a Special Grid Medium C C++ 3541. Find Most Frequent Vowel and Consonant Easy C C++ 3542. Minimum Operations to Convert All Elements to Zero Medium C C++ 3545. Minimum Deletions for At Most K Distinct Characters Easy C C++ 3550. Smallest Index With Digit Sum Equal to Index Easy C C++ 3573. Best Time to Buy and Sell Stock V Medium C C++ 3577. Count the Number of Computer Unlocking Permutations Medium C C++ 3578. Count Partitions With Max-Min Difference at Most K Medium C C++ 3583. Count Special Triplets Medium C C++ 3602. Hexadecimal and Hexatrigesimal Conversion Easy C C++ 3606. Coupon Code Validator Easy C C++ 3622. Check Divisibility by Digit Sum and Product Easy C++ 3637. Trionic Array I Easy C++ 3643. Flip Square Submatrix Vertically Easy C C++ 3652. Best Time to Buy and Sell Stock using Strategy Medium C C++ 3653. XOR After Range Multiplication Queries I Medium C C++ 3658. GCD of Odd and Even Sums Easy C C++ 3663. Find The Least Frequent Digit Easy C C++ 3668. Restore Finishing Order Easy C C++ 3683. Earliest Time to Finish One Task Easy C C++ 3684. Maximize Sum of At Most K Distinct Elements Easy C C++ 3688. Bitwise OR of Even Numbers in an Array Easy C C++ 3692. Majority Frequency Characters Easy C++ 3701. Compute Alternating Sum Easy C C++ 3708. Longest Fibonacci Subarray Medium C C++ 3712. Sum of Elements With Frequency Divisible by K Easy C C++ 3719. Longest Balanced Subarray I Medium C C++ 3726. Remove Zeros in Decimal Representation Easy C C++ 3731. Find Missing Elements Easy C C++ 3736. Minimum Moves to Equal Array Elements III Easy C C++ 3745. Maximize Expression of Three Elements Easy C C++ 3746. Minimum String Length After Balanced Removals Medium C C++ 3750. Minimum Number of Flips to Reverse Binary String Easy C C++ 3751. Total Waviness of Numbers in Range I Medium C C++ 3760. Maximum Substrings With Distinct Start Medium C C++ 3775. Reverse Words With Same Vowel Count Medium C C++ 3783. Mirror Distance of an Integer Easy C C++ 3794. Reverse String Prefix Easy C C++ 3798. Largest Even Number Easy C C++