| 1 | Two Sum |   |   |
| 2 | Add Two Numbers |  | |
| 3 | Longest Substring Without Repeating Characters | | |
| 5 | Longest Palindromic Substring | | |
| 6 | Zigzag Conversion | | |
| 7 | Reverse Integer | | |
| 8 | String to Integer (atoi) | | |
| 9 | Palindrome Number | | |
| 11 | Container With Most Water | | |
| 12 | Integer to Roman | | |
| 13 | Roman To Integer | | |
| 14 | Longest Common Prefix | | |
| 15 | 3Sum | | |
| 16 | 3Sum Closest | | |
| 17 | Letter Combinations of a Phone Number | | |
| 18 | 4Sum | | |
| 19 | Remove Nth Node From End of List | | |
| 20 | ValidParentheses | | |
| 21 | Merge 2 Sorted Lists | | |
| 22 | Generate Parentheses | | |
| 24 | Swap Nodes in Pairs | | |
| 25 | Reverse Nodes in k-Group | | |
| 26 | Remove Duplicates From Sorted Array | | |
| 27 | Remove Element | | |
| 28 | Needle in Haystack | | |
| 29 | Divide Two Integers | | |
| 30 | Substring with Concatenation of All Words | | |
| 31 | Next Permutation | | |
| 33 | Search in Rotated Sorted Array | | |
| 34 | Find First and Last Position of Element in Sorted Array | | |
| 35 | Search Inserted Position | | |
| 36 | Valid Sudoku | | |
| 37 | Sudoku Solver | | |
| 38 | Count and Say | | |
| 39 | Combination Sum | | |
| 40 | Combination Sum II | | |
| 41 | First Missing Positive | | |
| 42 | Trapping Rain Water | | |
| 43 | Multiply Strings | | |
| 45 | Jump Game II | | |
| 46 | Permutations | | |
| 47 | Permutations II | | |
| 48 | Rotate Image | | |
| 49 | Group Anagrams | | |
| 50 | Pow(x,n) | | |
| 51 | N-Queens | | |
| 51 | N-Queens II | | |
| 53 | Maximum SubArray | | |
| 54 | Spiral Matrix | | |
| 55 | Jump Game | | |
| 56 | Merge Intervals | | |
| 57 | Insert Interval | | |
| 58 | Length of Last Word | | |
| 59 | Spiral Matrix II | | |
| 61 | Rotate List | | |
| 62 | Unique Paths | | |
| 63 | Unique Paths II | | |
| 64 | Minimum Path Sum | | |
| 66 | Plus One | | |
| 67 | Add Binary | | |
| 68 | Text Justification | | |
| 69 | Sqrt(x) | | |
| 70 | Climbing Stairs | | |
| 71 | Simplify Path | | |
| 72 | Edit Distance | | |
| 73 | Set Matrix Zeroes | | |
| 74 | Search a 2D Matrix | | |
| 75 | Sort Colors | | |
| 77 | Combinations | | |
| 78 | Subsets | | |
| 79 | Word Search | | |
| 80 | Remove Duplicates from Sorted Array II | | |
| 81 | Search in Rotated Sorted Array II | | |
| 82 | Remove Duplicates from Sorted List II | | |
| 83 | Remove Duplicates from Sorted List | | |
| 86 | Partition List | | |
| 87 | Scramble String | | |
| 88 | Merge Sorted Array | | |
| 89 | Gray Code | | |
| 90 | Subsets II | | |
| 91 | Decode Ways | | |
| 92 | Reverse Linked List II | | |
| 93 | Restore IP Addresses | | |
| 94 | Binary Tree Inorder Traversal | | |
| 95 | Unique Binary Search Trees II | | |
| 96 | Unique Binary Search Trees | | |
| 97 | Interleaving String | | |
| 98 | Validate Binary Search Tree | | |
| 99 | Recover Binary Search Tree | | |
| 100 | Same Tree | | |
| 101 | Symmetric Tree | | |
| 102 | Binary Tree Level Order Traversal | | |
| 103 | Binary Tree Zigzag Level Order Traversal | | |
| 104 | Maximum Depth of Binary Tree | | |
| 105 | Construct Binary Tree from Preorder and Inorder Traversal | | |
| 106 | Construct Binary Tree from Inorder and Postorder Traversal | | |
| 107 | Binary Tree Level Order Traversal II | | |
| 108 | Convert Sorted Array To Binary Search Tree | | |
| 109 | Convert Sorted List to Binary Search Tree | | |
| 110 | Balanced Binary Tree | | |
| 111 | Minimum Depth of Binary Tree | | |
| 112 | Path Sum | | |
| 113 | Path Sum II | | |
| 114 | Flatten Binary Tree to Linked List | | |
| 116 | Populating Next Right Pointers in Each Node | | |
| 117 | Populating Next Right Pointers in Each Node II | | |
| 118 | Pascal's Triangle | | |
| 119 | Pascal's Triangle II | | |
| 120 | Triangle | | |
| 121 | Best Time to Buy and Sell Stocks | | |
| 122 | Best Time to Buy and Sell Stocks II | | |
| 123 | Binary Tree Maximum Path Sum | | |
| 125 | Valid Palindrome | | |
| 127 | Word Ladder | | |
| 128 | Longest Consecutive Sequence | | |
| 129 | Sum Root to Leaf Numbers | | |
| 130 | Surrounded Regions | | |
| 131 | Palindrome Partitioning | | |
| 133 | Clone Graph | | |
| 134 | Gas Station | | |
| 135 | Candy | | |
| 136 | Single Number | | |
| 137 | Single Number II | | |
| 138 | Copy List with Random Pointer | | |
| 139 | Word Break | | |
| 141 | Linked List Cycle | | |
| 142 | Linked List Cycle II | | |
| 143 | Reorder List | | |
| 144 | Binary Tree Preorder Traversal | | |
| 145 | Binary Tree Postorder Traversal | | |
| 146 | LRU Cache | | |
| 147 | Insertion Sort List | | |
| 148 | Sort List | | |
| 150 | Evaluate Reverse Polish Notation | | |
| 151 | Reverse Words in a String | | |
| 152 | Maximum Product Subarray | | |
| 153 | Find Minimum in Rotated Sorted Array | | |
| 155 | Min Stack | | |
| 156 | 🔒Binary Tree Upside Down | | |
| 157 | 🔒Read N Characters Given Read4 | | |
| 159 | 🔒Longest Substring With At Most Two Distinct Characters | | |
| 160 | Intersection of Two Linked Lists | | |
| 161 | 🔒One Edit Distance | | |
| 162 | Find Peak Element | | |
| 163 | Missing Ranges | | |
| 164 | Maximum Gap | | |
| 165 | Compare Version Numbers | | |
| 166 | Fraction to Recurring Decimal | | |
| 167 | Two Sum II - Input Array is Sorted | | |
| 168 | Excel Sheet Column Title | | |
| 169 | Majority Element | | |
| 170 | 🔒Two Sum III - Data Structure Design | | |
| 171 | Excel Sheet Column Number | | |
| 172 | Factoring Trailing Zeroes | | |
| 173 | Binary Search Tree Iterator | | |
| 179 | Largest Number | | |
| 187 | Repeated DNA Sequences | | |
| 189 | Rotate Array | | |
| 190 | Reverse Bits | | |
| 191 | Number of One Bits | | |
| 198 | House Robber | | |
| 199 | Binary Tree Right Side View | | |
| 200 | Number of Islands | | |
| 201 | Bitwise AND of Numbers Range | | |
| 202 | Happy Number | | |
| 203 | Remove Linked List Elements | | |
| 204 | Count Primes | | |
| 205 | Isomorphic Strings | | |
| 206 | Reverse Linked List | | |
| 207 | Course Schedule | | |
| 208 | Implement Trie (Prefix Tree) | | |
| 209 | Minimum Size Subarray Sum | | |
| 210 | Course Schedule II | | |
| 211 | Design Add and Search Words Data Structure | | |
| 213 | House Robber II | | |
| 215 | Kth Largest Element in an Array | | |
| 216 | Combination Sum III | | |
| 217 | Contains Duplicate | | |
| 218 | The Skyline Problem | | |
| 219 | Contains Duplicate II | | |
| 220 | Contains Duplicate III | | |
| 221 | Maximal Square | | |
| 222 | Count Complete Tree Nodes | | |
| 223 | Rectangle Area | | |
| 224 | Basic Calculator | | |
| 225 | Implement Stack using Queues | | |
| 226 | Invert Binary Tree | | |
| 227 | Basic Calculator II | | |
| 229 | Majority Element II | | |
| 230 | Kth Smallest Element in a BST | | |
| 231 | Power of Two | | |
| 232 | Implement Queue Using Stacks | | |
| 234 | Palindrome Linked Lists | | |
| 235 | Lowest Common Ancestor of a Binary Search Tree | | |
| 236 | Lowest Common Ancestor of a Binary Tree | | |
| 237 | Delete a Node In A Linked List | | |
| 238 | Product of Array Except Self | | |
| 240 | Search a 2D Matrix II | | |
| 241 | Different Ways to Add Parentheses | | |
| 242 | Valid Anagram | | |
| 243 | 🔒Shortest Word Distance | | |
| 244 | 🔒Shortest Word Distance II | | |
| 245 | 🔒Shortest Word Distance III | | |
| 246 | 🔒Strobogrammatic Number | | |
| 247 | 🔒Strobogrammatic Number II | | |
| 249 | 🔒Group Shifted Strings | | |
| 250 | 🔒Count Univalue Subtrees | | |
| 251 | 🔒Flatten 2D Vector | | |
| 252 | 🔒Meeting Rooms | | |
| 253 | 🔒Meeting Rooms II | | |
| 254 | 🔒Factor Combinations | | |
| 255 | 🔒Verify Preorder Sequence In Binary Search Tree | | |
| 256 | 🔒Paint House | | |
| 257 | Binary Tree Paths | | |
| 258 | Add Digits | | |
| 259 | 🔒3Sum Smaller | | |
| 260 | Single Number III | | |
| 261 | 🔒Graph Valid Tree | | |
| 263 | Ugly Number | | |
| 264 | Ugly Number II | | |
| 266 | 🔒Palindrome Permutation | | |
| 267 | 🔒Palindrome Permutation II | | |
| 268 | Missing Number | | |
| 269 | Alien Dictionary | | |
| 270 | 🔒Closest Binary Search Tree Value | | |
| 271 | 🔒Encode and Decode Strings | | |
| 274 | H-Index | | |
| 275 | H-Index II | | |
| 276 | 🔒Paint Fence | | |
| 277 | 🔒Find The Celebrity | | |
| 278 | First Bad Version | | |
| 279 | Perfect Squares | | |
| 280 | 🔒Wiggle Sort | | |
| 281 | 🔒Zigzag Iterator | | |
| 283 | Move Zeroes | | |
| 284 | Peeking Iterator | | |
| 285 | 🔒Inorder Successor in BST | | |
| 286 | 🔒Walls and Gates | | |
| 287 | Find the Duplicate Number | | |
| 288 | 🔒Unique Word Abbreviation | | |
| 289 | Game of Life | | |
| 290 | Word Pattern | | |
| 291 | 🔒Word Pattern II | | |
| 292 | Nim Game | | |
| 293 | 🔒Flip Game | | |
| 294 | 🔒Flip Game II | | |
| 298 | 🔒Binary Tree Longest Consecutive Sequence | | |
| 299 | Bulls and Cows | | |
| 300 | Longest Increasing Subsequence | | |
| 303 | Range Sum Query - Immutable | | |
| 304 | Range Sum Query 2D - Immutable | | |
| 306 | Additive Number | | |
| 307 | Range Sum Query - Mutable | | |
| 309 | Best Time to Buy and Sell Stock with Cooldown | | |
| 310 | Minimum Height Trees | | |
| 311 | 🔒Sparse Matrix Multiplication | | |
| 313 | Super Ugly Number | | |
| 314 | 🔒Binary Tree Vertical Order Traversal | | |
| 316 | Remove Duplicate Letters | | |
| 318 | Maximum Product of Word Lengths | | |
| 319 | Bulb Switcher | | |
| 320 | 🔒Generalized Abbreviation | | |
| 322 | Coin Change | | |
| 323 | 🔒Number of Connected Components in Undirected Graph | | |
| 324 | Wiggle Sort II | | |
| 325 | 🔒Maximum Size Subarray Sum Equals K | | |
| 326 | Power of Three | | |
| 328 | Odd Even Linked List | | |
| 331 | Verify Preorder Serialization of a Binary Tree | | |
| 331 | 🔒Largest BST Subtree | | |
| 332 | Reconstruct Itinerary | | |
| 334 | Increasing Triplet Subsequence | | |
| 337 | House Robber III | | |
| 338 | Counting Bits | | |
| 339 | 🔒Nested List Weight Sum | | |
| 340 | 🔒Longest Substring with At Most K Distinct Characters | | |
| 341 | Flatten Nested List Iterator | | |
| 342 | Power of Four | | |
| 343 | Integer Break | | |
| 344 | Reverse A String | | |
| 345 | Reverse Vowels of A String | | |
| 346 | 🔒Moving Average From Data Stream | | |
| 347 | Top K frequent Elements | | |
| 348 | 🔒Design Tic-Tac-Toe | | |
| 349 | Intersection of 2 Arrays | | |
| 350 | Intersection of 2 Arrays II | | |
| 351 | 🔒Android Unlock Patterns | | |
| 355 | Design Twitter | | |
| 357 | Count Numbers with Unique Digits | | |
| 359 | 🔒Logger Rate Limiter | | |
| 367 | Valid Perfect Square | | |
| 374 | Guess Number Higher or Lower | | |
| 380 | Insert Delete GetRandom O(1) | | |
| 383 | Ransom Note | | |
| 387 | First Unique Character in String | | |
| 389 | Find the Difference | | |
| 392 | Is Subsequence | | |
| 399 | Evaluate Division | | |
| 401 | Binary Watch | | |
| 404 | Sum of Left Leaves | | |
| 405 | Convert a Number to Hexadecimal | | |
| 408 | 🔒Valid Word Abbreviation | | |
| 409 | Longest Palindrome | | |
| 412 | Fizz Buzz | | |
| 414 | Third Maximum Number | | |
| 415 | Add Strings | | |
| 422 | 🔒Valid Word Square | | |
| 429 | 🔒N-ary Tree Level Order Traversal | | |
| 430 | Flatten a Multilevel Doubly Linked List | | |
| 433 | Minimum Genetic Mutation | | |
| 434 | Number of Segments in a String | | |
| 441 | Arranging Coins | | |
| 443 | String Compression | | |
| 447 | Number of Boomerangs | | |
| 448 | Find All Numbers Disappeared in an Array | | |
| 452 | Minimum Number of Arrows to Burst Balloons | | |
| 453 | Minimum Moves to Equal Array Elements | | |
| 455 | Assign Cookies | | |
| 459 | Repeated Substring Pattern | | |
| 461 | Hamming Distance | | |
| 463 | Island Perimeter | | |
| 475 | Heaters | | |
| 476 | Number Complement | | |
| 482 | License Key Formatting | | |
| 485 | Max Consecutive Ones | | |
| 492 | Construct the Rectangle | | |
| 495 | Teemo Attacking | | |
| 496 | Next Greater Element I | | |
| 499 | The Maze III | | |
| 500 | Keyboard Row | | |
| 501 | Find Mode in Binary Search Tree | | |
| 504 | Base 7 | | |
| 505 | The Maze II | | |
| 506 | Relative Ranks | | |
| 507 | Perfect Number | | |
| 509 | Fibonacci Number | | |
| 520 | Detect Capital | | |
| 521 | Longest Uncommon Subsequence I | | |
| 530 | Minimum Absolute Difference in BST | | |
| 532 | K - Diff Pairs in Array | | |
| 538 | Convert BST to Greater Tree | | |
| 541 | Reverse String II | | |
| 543 | Diameter of Binary Tree | | |
| 547 | Number of Provinces | | |
| 551 | Student Attendance Record I | | |
| 557 | Reverse Words in a String III | | |
| 559 | Maximum Depth of N-Ary Tree | | |
| 561 | Array Partition I | | |
| 563 | Binary Tree Tilt | | |
| 566 | Reshape The Matrix | | |
| 572 | Subtree of Another Tree | | |
| 575 | Distribute Candies | | |
| 581 | Shortest Unsorted Continuous Subarray | | |
| 589 | N-Ary Tree Preorder Traversal | | |
| 590 | N-Ary Tree Postorder Traversal | | |
| 594 | Longest Harmonious Subsequence | | |
| 598 | Range Addition II | | |
| 599 | Minimum Index Sum of 2 Lists | | |
| 604 | 🔒Design Compressed String Iterator | | |
| 605 | Can Place Flowers | | |
| 606 | Construct String from Binary Tree | | |
| 617 | Merge Two Binary Trees | | |
| 624 | 🔒Maximum Distance in Arrays | | |
| 628 | Maximum Product of Three Numbers | | |
| 633 | Sum Square Numbers | | |
| 637 | Average of Levels in Binary Tree | | |
| 643 | Maximum Average SubArray I | | |
| 645 | Set Mismatch | | |
| 653 | Two Sum IV - Input is a BST | | |
| 657 | Robot Return to Origin | | |
| 658 | Find K Closest Elements | | |
| 661 | Image Smoother | | |
| 665 | Non Deceasing Array | | |
| 669 | Trim a Binary Search Tree | | |
| 671 | Second Minimum Node in Binary Tree | | |
| 674 | Longest Continuous Increasing Subsequence | | |
| 680 | Valid Palindrome II | | |
| 682 | Baseball Game | | |
| 684 | Redundant Connection | | |
| 686 | Repeated String Match | | |
| 687 | Longest Univalue Path | | |
| 688 | Knight Probability in Chessboard | | |
| 690 | Employee Importance | | |
| 693 | Binary Number with Alternating Bits | | |
| 696 | Count Binary Substrings | | |
| 697 | Degree of an Array | | |
| 700 | Search in a Binary Search Tree | | |
| 702 | Search In A Sorted Array of Unknown Size | | |
| 703 | Kth Largest Element in a Stream | | |
| 704 | Binary Search | | |
| 705 | Design HashSet | | |
| 706 | Design HashMap | | |
| 709 | To Lower Case | | |
| 716 | 🔒Max Stack | | |
| 717 | 1-bit and 2-bit Characters | | |
| 718 | Maximum Length of Repeated Subarray | | |
| 720 | Longest Word in Dictionary | | |
| 724 | Find Pivot Index | | |
| 728 | Self Dividing Numbers | | |
| 733 | Flood Fill | | |
| 734 | 🔒Sentence Similarity | | |
| 743 | Network Delay Time | | |
| 734 | Sentence Similarity | | |
| 744 | Find Smallest Letter Greater Than Target | | |
| 746 | Min Cost Climbing Stairs | | |
| 747 | Largest Number at least Twice of Others | | |
| 748 | Shortest Completing Word | | |
| 758 | Bold Words in String | | |
| 760 | 🔒Find Anagram Mappings | | |
| 762 | Prime Number of Set Bits in Primary Representation | | |
| 766 | Toeplitz Matrix | | |
| 771 | Jewels and Stones | | |
| 783 | Minimum Distance Between BST Nodes | | |
| 787 | Cheapest Flights Within K Stops | | |
| 788 | Rotated Digits | | |
| 796 | Rotate String | | |
| 797 | All Paths From Source to Target | | |
| 800 | 🔒Similar RGB Color | | |
| 804 | Unique Morse Code Words | | |
| 806 | Number of Lines to Write String | | |
| 811 | Subdomain Visit Count | | |
| 812 | Largest Triangle Area | | |
| 819 | Most Common Word | | |
| 821 | Shortest Distance to Character | | |
| 824 | Goat Latin | | |
| 830 | Positions of Large Groups | | |
| 832 | Flipping an Image | | |
| 836 | Rectangle Overlap | | |
| 840 | Magic Squares in Grid | | |
| 844 | Backspace String Compare | | |
| 849 | Maximize Distance to Closest Person | | |
| 852 | Peak Index in Mountain Array | | |
| 859 | Buddy Strings | | |
| 860 | Lemonade Change | | |
| 867 | Transpose Matrix | | |
| 868 | Binary Gap | | |
| 872 | Leaf-Similar Trees | | |
| 874 | Walking Robot Simulation | | |
| 876 | Middle of the Linked List | | |
| 881 | Boats to Save People | | |
| 883 | Projection Area of 3D Shapes | | |
| 884 | Uncommon Words from 2 Sentences | | |
| 888 | Fair Candy Swap | | |
| 892 | Surface Area of 3D Shapes | | |
| 893 | Groups of Special Equivalent Strings | | |
| 896 | Monotonic Array | | |
| 897 | Increasing Order Search Tree | | |
| 905 | Sort Array by Parity | | |
| 908 | Smallest Range I | | |
| 909 | Snakes and Ladders | | |
| 914 | X of a kind in a Deck of Cards | | |
| 917 | Reverse Only Letters | | |
| 922 | Sort Array by Parity II | | |
| 925 | Long Pressed Name | | |
| 929 | Unique Email Addresses | | |
| 933 | Number of Recent Calls | | |
| 937 | Reorder Data In Log Files | | |
| 938 | Range Sum of BST | | |
| 941 | Valid Mountain Array | | |
| 942 | DI String Match | | |
| 944 | Delete Columns to Make Sorted | | |
| 949 | Largest Time for Given Digits | | |
| 952 | Largest Component Size by Common Factor | | |
| 953 | Verifying an Alien Dictionary | | |
| 961 | N-Repeated Elements in Size 2N Array | | |
| 965 | Univalued Binary Tree | | |
| 970 | Powerful Integers | | |
| 976 | Largest Perimeter Triangle | | |
| 977 | Squares of a Sorted Array | | |
| 983 | Minimum Cost For Tickets | | |
| 985 | Sum of Even Numbers after Queries | | |
| 989 | Add to Array Form of Integer | | |
| 993 | Cousins in Binary Tree | | |
| 994 | Rotting Oranges | | |
| 997 | Find the Town Judge | | |
| 999 | Available Captures for Rook | | |
| 1002 | Find Common Characters | | |
| 1005 | Maximize Sum of Array After K Negations | | |
| 1009 | Complement of Base 10 Integer | | |
| 1010 | Pairs of Songs With Total Durations Divisible by 60 | | |
| 1013 | Partition Array into Three Parts with equal Sum | | |
| 1018 | Binary Prefix Divisible by 5 | | |
| 1020 | Number of Enclaves | | |
| 1021 | Remove Outermost Parenthesis | | |
| 1022 | Sum of Root to Leaf Binary Numbers | | |
| 1025 | Divisor Game | | |
| 1029 | Two City Scheduling | | |
| 1030 | Matrix Cells in Distance Order | | |
| 1033 | Moving Stones Until Consecutive | | |
| 1037 | Valid Boomerang | | |
| 1042 | Flower Planting with no Adjacent | | |
| 1046 | Last Stone Weight | | |
| 1047 | Remove All adjacent Duplicates in String | | |
| 1051 | Height Checker | | |
| 1056 | 🔒Confusing Number | | |
| 1059 | 🔒All Paths From Source Lead To Destination | | |
| 1064 | 🔒Fixed Point | | |
| 1065 | 🔒Index Pairs of a String | | |
| 1071 | Greatest Common Divisors of Strings | | |
| 1078 | Occurrence After Bigram | | |
| 1085 | 🔒Sum of Digits in Minimum Number | | |
| 1086 | 🔒High Five | | |
| 1089 | Duplicate Zeroes | | |
| 1091 | Shortest Path in Binary Matrix | | |
| 1099 | 🔒Two Sum Less Than K | | |
| 1101 | The Earliest Moment When Everyone Become Friend | | |
| 1103 | Distribute Candies to People | | |
| 1108 | Defanging an IP Address | | |
| 1118 | 🔒Number of Days in a Month | | |
| 1119 | 🔒Remove Vowels From String | | |
| 1122 | Relative Sort Array | | |
| 1128 | Number of Equivalent Domino Pairs | | |
| 1133 | 🔒Largest Unique Number | | |
| 1134 | 🔒Armstrong Number | | |
| 1136 | 🔒Parallel Courses | | |
| 1137 | Nth Tribonacci Number | | |
| 1143 | Longest Common Subsequence | | |
| 1150 | Check if Number is Majority Element in Sorted Array | | |
| 1154 | Day of The Year | | |
| 1160 | Find Words That Can Be Formed By Characters | | |
| 1165 | Single Row Keyboard | | |
| 1168 | Optimize Water Distribution in a Village | | |
| 1170 | Compare Strings By Frequency of the Smallest Character | | |
| 1175 | Prime Arrangements | | |
| 1176 | 🔒Diet Plan Performance | | |
| 1180 | 🔒Count Substrings with only one Distinct Letter | | |
| 1184 | Distance Between Bus Stops | | |
| 1185 | Day of the Week | | |
| 1189 | Maximum Number of Balloons | | |
| 1196 | 🔒How Many Apples Can You Put into the Basket | | |
| 1200 | Minimum Absolute Difference | | |
| 1201 | Ugly Number III | | |
| 1202 | Smallest String With Swaps | | |
| 1207 | Unique Number of Occurrences | | |
| 1213 | 🔒Intersection of Three Sorted Arrays | | |
| 1217 | Minimum Cost to Move Chips to The Same Position | | |
| 1221 | Split A String In Balanced Strings | | |
| 1228 | 🔒Missing A Number In Arithmetic Progression | | |
| 1232 | Check If It Is A Straight Line | | |
| 1237 | Find Positive Integer Solutions for a Given Equation | | |
| 1243 | 🔒Array Transformation | | |
| 1249 | Minimum Remove to Make Valid Parentheses | | |
| 1252 | Cells With Odd Values In Matrix | | |
| 1254 | Number of Closed Islands | | |
| 1260 | Shift 2D Grid | | |
| 1266 | Minimum Time Visiting All Points | | |
| 1271 | 🔒Hexspeak | | |
| 1275 | Find Winner On a Tic Tac Toe Game | | |
| 1281 | Subtract the Product and Sum of Digits of a Integer | | |
| 1287 | Element Appearing More Than 25% in Sorted Array | | |
| 1290 | Convert Binary Number In A Linked List to Integer | | |
| 1295 | Find Numbers With Even Numbers of Digits | | |
| 1299 | Replace Elements With Greatest Element on Right Side | | |
| 1304 | Find N Unique Integers Sum Up To Zero | | |
| 1309 | Decrypt String From Alphabet To Integer Mapping | | |
| 1313 | Decompress Run-Length Encoded Strings | | |
| 1317 | Convert Integer to Sum Of Two Non-Zero Integers | | |
| 1319 | Number of Operations to Make Network Connected | | |
| 1323 | Maximum 69 Number | | |
| 1331 | Rank Transform of An Array | | |
| 1332 | Remove Palindromic Subsequences | | |
| 1337 | The K Weakest Rows In A Matrix | | |
| 1342 | Number of Steps to Reduce a Number to Zero | | |
| 1346 | Check if N and It's Double Exist | | |
| 1351 | Count Negative Numbers In A Sorted Matrix | | |
| 1356 | Sort Integers by Number of 1 Bits | | |
| 1360 | Number of Days Between Two Dates | | |
| 1365 | How Many Numbers Are Smaller Than Current Number | | |
| 1370 | Increasing Decreasing String | | |
| 1374 | Generate A String With Characters That Have Odd Count | | |
| 1376 | Time Needed to Inform All Employees | | |
| 1379 | Find a Corresponding Node of a Binary Tree in a Clone of That Tree | | |
| 1380 | Lucky Numbers In A Matrix | | |
| 1385 | Find The Distance Value Between 2 Arrays | | |
| 1389 | Create Target Array in Given Order | | |
| 1394 | Find Lucky Integer In An Array | | |
| 1399 | Count Largest Group | | |
| 1402 | Reducing Dishes | | |
| 1403 | Minimum Subsequence in Non-Increasing Order | | |
| 1408 | String Matching In An Array | | |
| 1413 | Minimum Value To Get Positive Step By Step Sum | | |
| 1417 | Reformat The String | | |
| 1422 | Maximum Score After Splitting A String | | |
| 1426 | 🔒Counting Elements | | |
| 1427 | 🔒Performing String Shifts | | |
| 1431 | Kids With The Greatest Number Of Candies | | |
| 1436 | Destination City | | |
| 1437 | Check If All 1's Are at Least Length K Places Away | | |
| 1441 | Build An Array With Stack Operation | | |
| 1444 | Number of Ways of Cutting a Pizza | | |
| 1446 | Consecutive Characters | | |
| 1450 | Number of Students Doing Homework at Given Time | | |
| 1455 | Check If Word Occurs as Prefix of any Word in Sentence | | |
| 1460 | Make 2 Arrays Equal by Reversing Sub Arrays | | |
| 1464 | Maximum Product of 2 Elements in Array | | |
| 1466 | Reorder Routes to Make All Paths Lead to the City Zero | | |
| 1469 | 🔒Find All Lonely Nodes | | |
| 1470 | Shuffle The Array | | |
| 1472 | Design Browser History | | |
| 1474 | 🔒Delete N Nodes After M Nodes In A Linked List | | |
| 1475 | Final Prices With Special Discount in a Shop | | |
| 1480 | Running Sum of 1D Array | | |
| 1486 | XOR Operations in An Array | | |
| 1491 | Average Salary Excluding the Minimum and Maximum Salary | | |
| 1496 | Path Crossing | | |
| 1502 | Can Make Arithmetic Progression From Sequence | | |
| 1507 | Reformat Date | | |
| 1512 | Number of Good Pairs | | |
| 1514 | Path with Maximum Probability | | |
| 1518 | Water Bottles | | |
| 1523 | Count Odd Numbers In Interval Range | | |
| 1528 | Shuffle Strings | | |
| 1534 | Count Good Triplets | | |
| 1539 | Kth Missing Positive Number | | |
| 1544 | Make The String Great | | |
| 1550 | Three Consecutive Odds | | |
| 1556 | Thousand Separator | | |
| 1560 | Most Visited Sector in a Circular Track | | |
| 1566 | Detect Pattern of Length M Repeated K or More Times | | |
| 1572 | Matrix Diagonal Sum | | |
| 1576 | Replace All ?'s to Avoid Consecutive Repeating Characters | | |
| 1582 | Special Positions in a Binary Matrix | | |
| 1584 | Min Cost to Connect All Points | | |
| 1588 | Sum of All Odd Length Subarrays | | |
| 1592 | Rearrange Spaces Between Words | | |
| 1598 | Crawler Log Folder | | |
| 1600 | Throne Inheritance | | |
| 1603 | Design Parking System | | |
| 1608 | Special Array With X Elements Greater Than or Equal X | | |
| 1614 | Maximum Nesting Depth of the Parentheses | | |
| 1619 | Mean of Array After Removing Some Elements | | |
| 1624 | Largest Substring Between Two Equal Characters | | |
| 1629 | Slowest Key | | |
| 1631 | Path With Minimum Effort | | |
| 1636 | Sort Array by Increasing Frequency | | |
| 1637 | Widest Vertical Area Between Two Points Containing No Points | | |
| 1640 | Check Array Formation Through Concatenation | | |
| 1646 | Get Maximum in Generated Array | | |
| 1652 | Defuse the Bomb | | |
| 1656 | Design an Ordered Stream | | |
| 1662 | Check If Two String Arrays are Equivalent | | |
| 1668 | Maximum Repeating Substring | | |
| 1672 | Richest Customer Wealth | | |
| 1678 | Goal Parser Interpretation | | |
| 1684 | Count the Number of Consistent Strings | | |
| 1688 | Count of Matches in Tournament | | |
| 1694 | Reformat Phone Number | | |
| 1700 | Number of Students Unable to Eat Lunch | | |
| 1704 | Determine if String Halves Are Alike | | |
| 1708 | 🔒Largest Subarray Length K | | |
| 1710 | Maximum Units on a Truck | | |
| 1716 | Calculate Money in Leetcode Bank | | |
| 1720 | Decode XORed Array | | |
| 1725 | Number Of Rectangles That Can Form The Largest Square | | |
| 1732 | Find the Highest Altitude | | |
| 1736 | Latest Time by Replacing Hidden Digits | | |
| 1742 | Maximum Number of Balls in a Box | | |
| 1748 | Sum of Unique Elements | | |
| 1752 | Check if Array Is Sorted and Rotated | | |
| 1758 | Minimum Changes To Make Alternating Binary String | | |
| 1763 | Longest Nice Substring | | |
| 1768 | Merge Strings Alternately | | |
| 1773 | Count Items Matching a Rule | | |
| 1779 | Find Nearest Point That Has the Same X or Y Coordinate | | |
| 1784 | Check if Binary String Has at Most One Segment of Ones | | |
| 1790 | Check if One String Swap Can Make Strings Equal | | |
| 1791 | Find Center of Star Graph | | |
| 1796 | Second Largest Digit in a String | | |
| 1800 | Maximum Ascending Subarray Sum | | |
| 1805 | Number of Different Integers in a String | | |
| 1812 | Determine Color of a Chessboard Square | | |
| 1816 | Truncate Sentence | | |
| 1822 | Sign of the Product of an Array | | |
| 1826 | 🔒Faulty Sensor | | |
| 1827 | Minimum Operations to Make the Array Increasing | | |
| 1832 | Check if the Sentence Is Pangram | | |
| 1837 | Sum of Digits in Base K | | |
| 1844 | Replace All Digits with Characters | | |
| 1848 | Minimum Distance to the Target Element | | |
| 1854 | Maximum Population Year | | |
| 1859 | Sorting the Sentence | | |
| 1863 | Sum of All Subset XOR Totals | | |
| 1869 | Longer Contiguous Segments of Ones than Zeros | | |
| 1876 | Substrings of Size Three with Distinct Characters | | |
| 1880 | Check if Word Equals Summation of Two Words | | |
| 1886 | Determine Whether Matrix Can Be Obtained By Rotation | | |
| 1893 | Check if All the Integers in a Range Are Covered | | |
| 1897 | Redistribute Characters to Make All Strings Equal | | |
| 1903 | Largest Odd Number in String | | |
| 1909 | Remove One Element to Make the Array Strictly Increasing | | |
| 1913 | Maximum Product Difference Between Two Pairs | | |
| 1920 | Build Array from Permutation | | |
| 1925 | Count Square Sum Triples | | |
| 1929 | Concatenation of Array | | |
| 1933 | 🔒Check If String Is Decomposable Into Value EqualSubstrings | | |
| 1935 | Maximum Number of Words You Can Type | | |
| 1941 | Check if All Characters Have Equal Number of Occurrences | | |
| 1945 | Sum of Digits of String After Convert | | |
| 1952 | Three Divisors | | |
| 1957 | Delete Characters to Make Fancy String | | |
| 1961 | Check If String Is a Prefix of Array | | |
| 1967 | Number of Strings That Appear as Substrings in Word | | |
| 1971 | Find if Path Exists in Graph | | |
| 1974 | Minimum Time to Type Word Using Special Typewriter | | |
| 1979 | Find Greatest Common Divisor of Array | | |
| 1984 | Minimum Difference Between Highest and Lowest of K Scores | | |
| 1991 | Find the Middle Index in Array | | |
| 1995 | Count Special Quadruplets | | |
| 2000 | Reverse Prefix of Word | | |
| 2006 | Count Number of Pairs With Absolute Difference K | | |
| 2011 | Final Value of Variable After Performing Operations | | |
| 2016 | Maximum Difference Between Increasing Elements | | |
| 2022 | Convert 1D Array Into 2D Array | | |
| 2027 | Minimum Moves to Convert String | | |
| 2032 | Two Out of Three | | |
| 2037 | Minimum Number of Moves to Seat Everyone | | |
| 2042 | Check if Numbers Are Ascending in a Sentence | | |
| 2047 | Number of Valid Words in a Sentence | | |
| 2053 | Kth Distinct String in an Array | | |
| 2057 | Smallest Index With Equal Value | | |
| 2062 | Count Vowel Substrings of a String | | |
| 2068 | Check Whether Two Strings are Almost Equivalent | | |
| 2073 | Time Needed to Buy Tickets | | |
| 2078 | Two Furthest Houses With Different Colors | | |
| 2085 | Count Common Words With One Occurrence | | |
| 2089 | Find Target Indices After Sorting Array | | |
| 2093 | Minimum Cost To Reach City With Discounts | | |
| 2094 | Finding 3-Digit Even Numbers | | |
| 2099 | Find Subsequence of Length K With the Largest Sum | | |
| 2103 | Rings and Rods | | |
| 2108 | Find First Palindromic String in the Array | | |
| 2114 | Maximum Number of Words Found in Sentences | | |
| 2119 | A Number After a Double Reversal | | |
| 2124 | Check if All A's Appears Before All B's | | |
| 2129 | Capitalize the Title | | |
| 2133 | Check if Every Row and Column Contains All Numbers | | |
| 2138 | Divide a String Into Groups of Size k | | |
| 2144 | Minimum Cost of Buying Candies With Discount | | |
| 2148 | Count Elements With Strictly Smaller and Greater Elements | | |
| 2154 | Keep Multiplying Found Values by Two | | |
| 2160 | Minimum Sum of Four Digit Number After Splitting Digits | | |
| 2164 | Sort Even and Odd Indices Independently | | |
| 2169 | Count Operations to Obtain Zero | | |
| 2176 | Count Equal and Divisible Pairs in an Array | | |
| 2180 | Count Integers With Even Digit Sum | | |
| 2185 | Counting Words With a Given Prefix | | |
| 2190 | Most Frequent Number Following Key In an Array | | |
| 2194 | Cells in a Range on an Excel Sheet | | |
| 2200 | Find All K-Distant Indices in an Array | | |
| 2206 | Divide Array Into Equal Pairs | | |
| 2210 | Count Hills and Valleys in an Array | | |
| 2215 | Find the Difference of Two Arrays | | |
| 2220 | Minimum Bit Flips to Convert Number | | |
| 2224 | Minimum Number of Operations to Convert Time | | |
| 2229 | 🔒Check if an array is consecutive | | |
| 2231 | Largest Number After Digit Swaps by Parity | | |
| 2235 | Add Two Integers | | |
| 2236 | Root Equals Sum of Children | | |
| 2239 | Find Closest Number to Zero | | |
| 2243 | Calculate Digit Sum of a String | | |
| 2248 | Intersection of Multiple Arrays | | |
| 2255 | Count Prefixes of a Given String | | |
| 2259 | Remove Digit From Number to Maximize Result | | |
| 2264 | Largest 3-Same-Digit Number in String | | |
| 2269 | Find the K-Beauty of a Number | | |
| 2273 | Find Resultant Array After Removing Anagrams | | |
| 2278 | Percentage of Letter in String | | |
| 2283 | Check if Number Has Equal Digit Count and Digit Value | | |
| 2287 | Rearrange Characters to Make Target String | | |
| 2293 | Min Max Game | | |
| 2299 | Strong Password Checker II | | |
| 2300 | Successful Pairs of Spells and Potions | | |
| 2303 | Calculate Amount Paid in Taxes | | |
| 2309 | Greatest English Letter in Upper and Lower Case | | |
| 2315 | Count Asterisks | | |
| 2316 | Count Unreachable Pairs of Nodes in an Undirected Graph | | |
| 2319 | Check if Matrix Is X-Matrix | | |
| 2325 | Decode the Message | | |
| 2331 | Evaluate Boolean Binary Tree | | |
| 2335 | Minimum Amount of Time to Fill Cups | | |
| 2439 | Minimize Maximum of Array | | |
| 2341 | Maximum Number of Pairs in Array | | |
| 2347 | Best Poker Hand | | |
| 2348 | Number of Zero-Filled Subarrays | | |
| 2351 | First Letter to Appear Twice | | |
| 2357 | Make Array Zero by Subtracting Equal Amounts | | |
| 2360 | Longest Cycle in a Graph | | |
| 2363 | Merge Similar Items | | |
| 2367 | Number of Arithmetic Triplets | | |
| 2373 | Largest Local Values in a Matrix | | |
| 2379 | Minimum Recolors to Get K Consecutive Black Blocks | | |
| 2383 | Minimum Hours of Training to Win a Competition | | |
| 2389 | Longest Subsequence With Limited Sum | | |
| 2395 | Find Subarrays With Equal Sum | | |
| 2399 | Check Distances Between Same Letters | | |
| 2404 | Most Frequent Even Element | | |
| 2409 | Count Days Spent Together | | |
| 2413 | Smallest Even Multiple | | |
| 2418 | Sort the People | | |
| 2423 | Remove Letter To Equalize Frequency | | |
| 2427 | Number of Common Factors | | |
| 2432 | The Employee That Worked on the Longest Task | | |
| 2437 | Number of Valid Clock Times | | |
| 2441 | Largest Positive Integer That Exists With Its Negative | | |
| 2446 | Determine if Two Events Have Conflict | | |
| 2451 | Odd String Difference | | |
| 2455 | Average Value of Even Numbers That Are Divisible by Three | | |
| 2460 | Apply Operations to an Array | | |
| 2465 | Number of Distinct Averages | | |
| 2466 | Count Ways To Build Good Strings | | |
| 2469 | Convert the Temperature | | |
| 2475 | Number of Unequal Triplets in Array | | |
| 2481 | Minimum Cuts to Divide a Circle | | |
| 2485 | Find the Pivot Integer | | |
| 2490 | Circular Sentence | | |
| 2492 | Minimum Score of a Path Between Two Cities | | |
| 2496 | Maximum Value of a String in an Array | | |
| 2500 | Delete Greatest Value in Each Row | | |
| 2506 | Count Pairs Of Similar Strings | | |
| 2511 | Maximum Enemy Forts That Can Be Captured | | |
| 2515 | Shortest Distance to Target String in a Circular Array | | |
| 2520 | Count the Digits That Divide a Number | | |
| 2525 | Categorize Box According to Criteria | | |
| 2529 | Maximum Count of Positive Integer and Negative Integer | | |
| 2535 | Difference Between Element Sum and Digit Sum of an Array | | |
| 2540 | Minimum Common Value | | |
| 2544 | Alternating Digit Sum | | |
| 2549 | Count Distinct Numbers on Board | | |
| 2553 | Separate the Digits in an Array | | |
| 2558 | Take Gifts From the Richest Pile | | |
| 2562 | Find the Array Concatenation Value | | |
| 2566 | Maximum Difference by Remapping a Digit | | |
| 2570 | Merge Two 2D Arrays by Summing Values | | |
| 2574 | Left and Right Sum Differences | | |
| 2578 | Split With Minimum Sum | | |
| 2582 | Pass the Pillow | | |
| 2586 | Count the Number of Vowel Strings in Range | | |
| 2591 | Distribute Money to Maximum Children | | |
| 2595 | Number of Even and Odd Bits | | |
| 2600 | K Items With the Maximum Sum | | |
| 2605 | Form Smallest Number From Two Digit Arrays | | |
| 2609 | Find the Longest Balanced Substring of a Binary String | | |
| 2614 | Prime In Diagonal | | |
| 2639 | Find the Width of Columns of a Grid | | |
| 2643 | Row With Maximum Ones | | |
| 2644 | Find the Maximum Divisibility Score | | |
| 2651 | Calculate Delayed Arrival Time | | |
| 2652 | Sum Multiples | | |
| 2656 | Maximum Sum With Exactly K Elements | | |
| 2660 | Determine the Winner of a Bowling Game | | |
| 2670 | Find the Distinct Difference Array | | |
| 2678 | Number of Senior Citizens | | |
| 2682 | Find the Losers of the Circular Game | | |
| 2689 | 🔒Extract Kth Character From The Rope Tree | | |
| 2696 | Minimum String Length After Removing Substrings | | |
| 2697 | Lexicographically Smallest Palindrome | | |
| 2706 | Buy Two Chocolates | | |
| 2710 | Remove Trailing Zeros From a String | | |
| 2716 | Minimize String Length | | |
| 2717 | Semi-Ordered Permutation | | |
| 2728 | 🔒Count Houses in a Circular Street | | |
| 2729 | Check if The Number is Fascinating | | |
| 2733 | Neither Minimum nor Maximum | | |
| 2739 | Total Distance Traveled | | |
| 2744 | Find Maximum Number of String Pairs | | |
| 2748 | Number of Beautiful Pairs | | |
| 2760 | Longest Even Odd Subarray With Threshold | | |
| 2765 | Longest Alternating Subarray | | |
| 2769 | Find the Maximum Achievable Number | | |
| 2778 | Sum of Squares of Special Elements | | |
| 2784 | Check if Array is Good | | |
| 2788 | Split Strings by Separator | | |
| 2798 | Number of Employees Who Met the Target | | |
| 2806 | Account Balance After Rounded Purchase | | |
| 2810 | Faulty Keyboard | | |
| 2815 | Max Pair Sum in an Array | | |
| 2824 | Count Pairs Whose Sum is Less than Target | | |
| 2828 | Check if a String Is an Acronym of Words | | |
| 2833 | Furthest Point From Origin | | |
| 2839 | Check if Strings Can be Made Equal With Operations I | | |
| 2843 | Count Symmetric Integers | | |
| 2848 | Points That Intersect With Cars | | |
| 2855 | Minimum Right Shifts to Sort the Array | | |
| 2859 | Sum of Values at Indices With K Set Bits | | |
| 2864 | Maximum Odd Binary Number | | |
| 2869 | Minimum Operations to Collect Elements | | |
| 2873 | Maximum Value of an Ordered Triplet I | | |
| 2894 | Divisible and Non-divisible Sums Difference | | |
| 2899 | Last Visited Integers | | |
| 2900 | Longest Unequal Adjacent Groups Subsequence I | | |
| 2903 | Find Indices With Index and Value Difference I | | |
| 2908 | Minimum Sum of Mountain Triplets I | | |
| 2913 | Subarrays Distinct Element Sum of Squares I | | |
| 2917 | Find the K-or of an Array | | |
| 2923 | Find Champion I | | |
| 2928 | Distribute Candies Among Children I | | |
| 2932 | Maximum Strong Pair XOR I | | |
| 2937 | Make Three Strings Equal | | |
| 2942 | Find Words Containing Character | | |
| 2946 | Matrix Similarity After Cyclic Shifts | | |
| 2951 | Find the Peaks | | |
| 2956 | Find Common Elements Between Two Arrays | | |
| 2960 | Count Tested Devices After Test Operations | | |
| 2965 | Find Missing and Repeated Values | | |
| 2970 | Count the Number of Irremovable Subarrays I | | |
| 2974 | Minimum Number Game | | |
| 2980 | Check if Bitwise OR Has Trailing Zeros | | |
| 2996 | Smallest Missing Integer Greater Than Sequential Prefix Sum | | |
| 3000 | Maximum Area of Longest Diagonal Rectangle | | |
| 3005 | Count Elements With Maximum Frequency | | |
| 3010 | Divide an Array Into Subarrays With Minimum Cost I | | |
| 3014 | Minimum Number of Pushes to Type Word I | | |
| 3019 | Number of Changing Keys | | |
| 3024 | Type of Triangle | | |
| 3028 | Ant on the Boundary | | |
| 3032 | 🔒Count Numbers With Unique Digits II | | |
| 3033 | Modify the Matrix | | |
| 3038 | Maximum Number of Operations With the Same Score I | | |
| 3042 | Count Prefix and Suffix Pairs I | | |
| 3046 | Split the Array | | |
| 3062 | 🔒Winner of the Linked List Game | | |
| 3063 | 🔒Linked List Frequency | | |
| 3065 | Minimum Operations to Exceed Threshold Value I | | |
| 3069 | Distribute Elements Into Two Arrays I | | |
| 3074 | Apple Redistribution into Boxes | | |
| 3079 | Find the Sum of Encrypted Integers | | |
| 3083 | Existence of a Substring in a String and Its Reverse | | |
| 3090 | Maximum Length Substring With Two Occurrences | | |
| 3095 | Shortest Subarray With OR at Least K I | | |
| 3099 | Harshad Number | | |
| 3105 | Longest Strictly Increasing or Strictly Decreasing Subarray | | |
| 3110 | Score of a String | | |
| 3114 | Latest Time You Can Obtain After Replacing Characters | | |
| 3120 | Count the Number of Special Characters I | | |
| 3127 | Make a Square with the Same Color | | |
| 3131 | Find the Integer Added to Array I | | |
| 3136 | Valid Word | | |
| 3142 | Check if Grid Satisfies Conditions | | |
| 3146 | Permutation Difference between Two Strings | | |
| 3151 | Special Array I | | |
| 3158 | Find the XOR of Numbers Which Appear Twice | | |
| 3162 | Find the Number of Good Pairs I | | |
| 3168 | Minimum Number of Chairs in a Waiting Room | | |
| 3173 | 🔒Bitwise OR of Adjacent Elements | | |
| 3174 | Clear Digits | | |
| 3178 | Find the Child Who Has the Ball After K Seconds | | |
| 3184 | Count Pairs That Form a Complete Day I | | |
| 3190 | Find Minimum Operations to Make All Elements Divisible by Three | | |
| 3194 | Minimum Average of Smallest and Largest Elements | | |
| 3199 | 🔒Count Triplets With Even XOR Set Bits I | | |
