leetcode solution
1.0.0
Welcome to a robust and versatile repository of LeetCode solutions! This repository is a treasure trove for coding enthusiasts, educators, students, and professionals who are preparing for technical interviews or enhancing their coding skills.
The solutions are organized as follows:
| # | Title | Solution | Difficulty & ReadMe |
|---|---|---|---|
| 0001 | Two Sum | Python | Easy |
| 0002 | Add Two Numbers | Python, C++ | Medium |
| 0003 | Longest Substring Without Repeating Characters | Python | Medium |
| 0004 | Median of Two Sorted Arrays | Python | Hard |
| 0005 | Longest Palindromic Substring | Python | Medium |
| 0006 | ZigZag Conversion | Python | Medium |
| 0007 | Reverse Integer | Python | Medium |
| 0008 | String to Integer (atoi) | Python | Medium |
| 0009 | Palindrome Number | C++ | Easy |
| 0010 | Regular Expression Matching | Python | Hard |
| 0011 | Container With Most Water | Python | Medium |
| 0012 | Integer to Roman | Python | Medium |
| 0013 | Roman to Integer | C++ | Easy |
| 0014 | Longest Common Prefix | C++ | Easy |
| 0015 | 3Sum | Python | Medium |
| 0016 | 3Sum Closest | Python | Medium |
| 0017 | Letter Combinations of a Phone Number | Python | Medium |
| 0018 | 4Sum | Python | Medium |
| 0019 | Remove Nth Node From End of List | Python | Medium |
| 0020 | Valid Parentheses | Python | Easy |
| 0021 | Merge Two Sorted Lists | Python | Easy |
| 0022 | Generate Parentheses | Python | Medium |
| 0023 | Merge k Sorted Lists | Python | Hard |
| 0024 | Swap Nodes in Pairs | Python | Medium |
| 0025 | Reverse Nodes in k-Group | Python | Hard |
| 0026 | Remove Duplicates from Sorted Array | Python | Easy |
| 0027 | Remove Element | Python | Easy |
| 0028 | Implement strStr() | Python | Easy |
| 0029 | Divide Two Integers | Python | Medium |
| 0030 | Substring with Concatenation of All Words | Python | Hard |
| 0031 | Next Permutation | Python | Medium |
| 0032 | Longest Valid Parentheses | Python | Hard |
| 0033 | Search in Rotated Sorted Array | Python | Medium |
| 0034 | Find First and Last Position of Element in Sorted Array | Python | Medium |
| 0035 | Search Insert Position | Python | Easy |
| 0036 | Valid Sudoku | Python | Medium |
| 0037 | Sudoku Solver | Python | Hard |
| 0038 | Count and Say | Python | Medium |
| 0039 | Combination Sum | Python | Medium |
| 0040 | Combination Sum II | Python | Medium |
| 0041 | First Missing Positive | Python | Hard |
| 0042 | Trapping Rain Water | Python | Hard |
| 0043 | Multiply Strings | Python | Medium |
| 0045 | Jump Game II | C++ | Hard |
| 0046 | Permutations | C++ | Medium |
| 0047 | Permutations II | Python | Medium |
| 0048 | Rotate Image | C++ | Medium |
| 0049 | Group Anagrams | Python | Medium |
| 0050 | Pow(x, n) | Python | Medium |
| 0051 | N Queens | Python | Hard |
| 0052 | N Queens II | Python | Hard |
| 0053 | Maximum Subarray | Python | Easy |
| 0054 | Spiral Matrix | Python | Medium |
| 0055 | Jump Game | C++ | Medium |
| 0056 | Merge Intervals | Python | Medium |
| 0057 | Insert Interval | Python | Hard |
| 0058 | Length of Last Word | Python | Easy |
| 0059 | Spiral Matrix II | C++ | Medium |
| 0061 | Rotate List | Python | Medium |
| 0062 | Unique Paths | Python | Medium |
| 0063 | Unique Paths II | Python | Medium |
| 0064 | Minimum Path Sum | Python | Medium |
| 0066 | Plus One | Python | Easy |
| 0067 | Add Binary | Python | Easy |
| 0068 | Text Justification | Python | Hard |
| 0069 | Sqrt(x) | Python | Easy |
| 0070 | Climbing Stairs | Python | Easy |
| 0071 | Simplify Path | Python | Medium |
| 0072 | Edit Distance | Python | Medium |
| 0073 | Set Matrix Zeroes | Python | Medium |
| 0074 | Search a 2D Matrix | Python | Medium |
| 0075 | Sort Colors | Python | Medium |
| 0076 | Minimum Window Substring | Python | Hard |
| 0077 | Combinations | Python | Medium |
| 0078 | Subsets | Python | Medium |
| 0079 | Word Search | Python | Medium |
| 0080 | Remove Duplicates from Sorted Array II | Python | Medium |
| 0081 | Search in Rotated Sorted Array II | Python | Medium |
| 0082 | Remove Duplicates from Sorted List II | Python | Medium |
| 0083 | Remove Duplicates from Sorted List | C++ | Easy |
| 0084 | Largest Rectangle in Histogram | Python | Hard |
| 0085 | Maximal Rectangle | Python | Hard |
| 0086 | Partition List | Python | Medium |
| 0088 | Merge Sorted Array | C++ | Easy |
| 0089 | Gray Code | Python | Medium |
| 0090 | Subsets II | Python | Medium |
| 0091 | Decode Ways | Python | Medium |
| 0092 | Reverse Linked List II | Python | Medium |
| 0093 | Restore IP Addresses | Python | Medium |
| 0094 | Binary Tree Inorder Traversal | Python | Easy |
| 0095 | Unique Binary Search Trees II | Python | Medium |
| 0096 | Unique Binary Search Trees | Python | Medium |
| 0097 | Interleaving String | Python | Medium |
| 0098 | Validate Binary Search Tree | Python | Medium |
| 0100 | Same Tree | Python | Easy |
| 0101 | Symmetric Tree | C++ | Easy |
| 0102 | Binary Tree Level Order Traversal | Python | Medium |
| 0103 | Binary Tree Zigzag Level Order Traversal | Python | Medium |
| 0104 | Maximum Depth of Binary Tree | Python | Easy |
| 0105 | Construct Binary Tree from Preorder and Inorder Traversal | Python | Medium |
| 0106 | Construct Binary Tree from Inorder and Postorder Traversal | Python | Medium |
| 0108 | Convert Sorted Array to Binary Search Tree | Python | Easy |
| 0110 | Balanced Binary Tree | Python | Easy |
| 0111 | Minimum Depth of Binary Tree | Python | Easy |
| 0112 | Path Sum | Python | Easy |
| 0113 | Path Sum II | Python | Medium |
| 0114 | Flatten Binary Tree to Linked List | Python | Medium |
| 0115 | Distinct Subsequences | Python | Hard |
| 0116 | Populating Next Right Pointers in Each Node | C++ | Medium |
| 0117 | Populating Next Right Pointers in Each Node II | Python | Medium |
| 0118 | Pascal's Triangle | Python | Easy |
| 0119 | Pascal's Triangle II | Python | Easy |
| 0120 | Triangle | Python | Medium |
| 0121 | Best Time to Buy and Sell Stock | Python | Easy |
| 0122 | Best Time to Buy and Sell Stock II | Python | Medium |
| 0123 | Best Time to Buy and Sell Stock III | Python | Hard |
| 0124 | Binary Tree Maximum Path Sum | Python | Medium |
| 0125 | Valid Palindrome | Python | Easy |
| 0127 | Word Ladder | Python | Medium |
| 0128 | Longest Consecutive Sequence | Python | Hard |
| 0129 | Sum Root to Leaf Numbers | Python | Medium |
| 0130 | Surrounded Regions | Python | Medium |
| 0131 | Palindrome Partitioning | Python | Medium |
| 0133 | Clone Graph | Python | Medium |
| 0134 | Gas Station | Python | Medium |
| 0135 | Candy | Python | Hard |
| 0136 | Single Number | Python | Easy |
| 0137 | Single Number II | Python | Medium |
| 0138 | Copy List with Random Pointer | Python | Medium |
| 0139 | Word Break | Python | Medium |
| 0140 | Word Break II | Python | Hard |
| 0141 | Linked List Cycle | Python | Easy |
| 0142 | Linked List Cycle II | Python | Medium |
| 0143 | Reorder List | Python | Medium |
| 0144 | Binary Tree Preorder Traversal | Python | Easy |
| 0145 | Binary Tree Postorder Traversal | Python | Easy |
| 0146 | LRU Cache | Python | Medium |
| 0148 | Sort List | Python | Medium |
| 0149 | Max Points on a Line | Python | Hard |
| 0150 | Evaluate Reverse Polish Notation | Python | Medium |
| 0151 | Reverse Words in a String | Python | Medium |
| 0152 | Maximum Product Subarray | Python | Medium |
| 0153 | Find Minimum in Rotated Sorted Array | Python | Medium |
| 0155 | Min Stack | Python | Easy |
| 0159 | Longest Substring with At Most Two Distinct Characters | Python | Medium |
| 0160 | Intersection of Two Linked Lists | Python | Easy |
| 0162 | Find Peak Element | Python | Medium |
| 0165 | Compare Version Numbers | Python | Medium |
| 0166 | Fraction to Recurring Decimal | Python | Medium |
| 0167 | Two Sum II - Input array is sorted | Python | Easy |
| 0168 | Excel Sheet Column Title | Python | Easy |
| 0169 | Majority Element | Python | Easy |
| 0172 | Factorial Trailing Zeroes | Python | Medium |
| 0173 | Binary Search Tree Iterator | Python | Medium |
| 0179 | Largest Number | Python | Medium |
| 0188 | Best Time to Buy and Sell Stock IV | Python | Hard |
| 0189 | Rotate Array | C++ | Medium |
| 0190 | Reverse Bits | Python | Easy |
| 0191 | Number of 1 Bits | Python | Easy |
| 0198 | House Robber | Python | Easy |
| 0199 | Binary Tree Right Side View | Python | Medium |
| 0200 | Number of Islands | Python | Medium |
| 0201 | Bitwise AND of Numbers Range | Python | Medium |
| 0202 | Happy Number | Python | Easy |
| 0203 | Remove Linked List Elements | C++ | Easy |
| 0205 | Isomorphic Strings | Python | Easy |
| 0206 | Reverse Linked List | Python | Easy |
| 0207 | Course Schedule | Python | Medium |
| 0208 | Implement Trie (Prefix Tree) | Python | Medium |
| 0209 | Minimum Size Subarray Sum | Python | Medium |
| 0210 | Course Schedule II | Python | Medium |
| 0211 | Design Add and Search Words Data Structure | Python | Medium |
| 0212 | Word Search II | Python | Hard |
| 0213 | House Robber II | C++ | Medium |
| 0214 | Shortest Palindrome | Python | Hard |
| 0215 | Kth Largest Element in an Array | Python | Medium |
| 0216 | Combination Sum III | Python | Medium |
| 0217 | Contains Duplicate | Python | Easy |
| 0219 | Contains Duplicate II | Python | Easy |
| 0221 | Maximal Square | Python | Medium |
| 0222 | Count Complete Tree Nodes | Python | Easy |
| 0224 | Basic Calculator | Python | Hard |
| 0225 | Implement Stack using Queues | Python | Easy |
| 0226 | Invert Binary Tree | Python | Easy |
| 0227 | Basic Calculator II | Python | Medium |
| 0228 | Summary Ranges | Python | Easy |
| 0229 | Majority Element II | Python | Medium |
| 0230 | Kth Smallest Element in a BST | Python | Medium |
| 0231 | Power of Two | C++ | Easy |
| 0232 | Implement Queue using Stacks | Python | Easy |
| 0234 | Palindrome Linked List | Python | Easy |
| 0235 | Lowest Common Ancestor of a Binary Search Tree | Python | Easy |
| 0236 | Lowest Common Ancestor of a Binary Tree | Python | Medium |
| 0237 | Delete Node in a Linked List | Python | Medium |
| 0238 | Product of Array Except Self | Python | Medium |
| 0239 | Sliding Window Maximum | Python | Hard |
| 0240 | Search a 2D Matrix II | Python | Medium |
| 0241 | Different Ways to Add Parentheses | Python | Medium |
| 0242 | Valid Anagram | Python | Easy |
| 0249 | Group Shifted Strings | Python | Medium |
| 0252 | Meeting Rooms | Python | Easy |
| 0253 | Meeting Rooms II | Python | Medium |
| 0255 | Verify Preorder Sequence in Binary Search Tree | Python | Medium |
| 0256 | Paint House | Python | Medium |
| 0259 | 3Sum Smaller | Python | Medium |
| 0260 | Single Number III | Python | Medium |
| 0261 | Graph Valid Tree | Python | Medium |
| 0263 | Ugly Number | Python | Easy |
| 0264 | Ugly Number II | Python | Medium |
| 0265 | Paint House II | Python | Hard |
| 0268 | Missing Number | Python | Easy |
| 0269 | Alien Dictionary | Python | Hard |
| 0271 | Encode and Decode Strings | Python | Medium |
| 0273 | Integer to English Words | Python | Hard |
| 0274 | H-Index | Python | Medium |
| 0276 | Paint Fence | Python | Medium |
| 0277 | Find the Celebrity | Python | Medium |
| 0278 | First Bad Version | Python | Easy |
| 0279 | Perfect Squares | Python | Medium |
| 0283 | Move Zeroes | C++ | Easy |
| 0285 | Inorder Successor in BST | Python | Medium |
| 0286 | Walls and Gates | Python | Medium |
| 0287 | Find the Duplicate Number | Python | Medium |
| 0290 | Word Pattern | Python | Easy |
| 0291 | Word Pattern II | Python | Medium |
| 0293 | Flip Game | Python | Easy |
| 0295 | Find Median from Data Stream | Python | Hard |
| 0296 | Best Meeting Point | Python | Hard |
| 0297 | Serialize and Deserialize Binary Tree | Python | Hard |
| 0299 | Bulls and Cows | Python | Medium |
| 0300 | Longest Increasing Subsequence | Python | Medium |
| 0304 | Range Sum Query 2D - Immutable | Python | Medium |
| 0305 | Number of Islands II | Python | Hard |
| 0309 | Best Time to Buy and Sell Stock with Cooldown | Python | Medium |
| 0310 | Minimum Height Trees | Python | Medium |
| 0312 | Burst Balloons | Python | Hard |
| 0316 | Remove Duplicate Letters | Python | Hard |
| 0320 | Generalized Abbreviation | Python | Medium |
| 0322 | Coin Change | Python | Medium |
| 0323 | Number of Connected Components in an Undirected Graph | Python | Medium |
| 0328 | Odd Even Linked List | Python | Medium |
| 0329 | Longest Increasing Path in a Matrix | Python | Hard |
| 0330 | Patching Array | Python | Hard |
| 0332 | Reconstruct Itinerary | Python | Medium |
| 0334 | Increasing Triplet Subsequence | Python | Medium |
| 0338 | Counting Bits | Python | Medium |
| 0340 | Longest Substring with At Most K Distinct Characters | Python | Medium |
| 0341 | Flatten Nested List Iterator | Python | Medium |
| 0342 | Power of Four | Python | Easy |
| 0343 | Integer Break | Python | Medium |
| 0344 | Reverse String | Python | Easy |
| 0345 | Reverse Vowels of a String | Python | Easy |
| 0346 | Moving Average from Data Stream | Python | Easy |
| 0347 | Top K Frequent Elements | Python | Medium |
| 0349 | Intersection of Two Arrays | Python | Easy |
| 0350 | Intersection of Two Arrays II | Python | Easy |
| 0351 | Android Unlock Patterns | Python | Medium |
| 0355 | Design Twitter | Python | Medium |
| 0358 | Rearrange String k Distance Apart | Python | Hard |
| 0362 | Design Hit Counter | Python | Medium |
| 0366 | Find Leaves of Binary Tree | Python | Medium |
| 0368 | Largest Divisible Subset | Python | Medium |
| 0371 | Sum of Two Integers | Python | Medium |
| 0373 | Find K Pairs with Smallest Sums | Python | Medium |
| 0374 | Guess Number Higher or Lower | Python | Easy |
| 0377 | Combination Sum IV | Python | Medium |
| 0380 | Insert Delete GetRandom O(1) | Python | Medium |
| 0383 | Ransom Note | Python | Easy |
| 0386 | Lexicographical Numbers | Python | Medium |
| 0387 | First Unique Character in a String | Python | Easy |
| 0388 | Longest Absolute File Path | Python | Medium |
| 0389 | Find the Difference | Python | Easy |
| 0390 | Elimination Game | Python | Medium |
| 0391 | Perfect Rectangle | Python | Hard |
| 0392 | Is Subsequence | Python | Easy |
| 0393 | UTF-8 Validation | Python | Medium |
| 0394 | Decode String | Python | Medium |
| 0395 | Longest Substring with At Least K Repeating Characters | Python | Medium |
| 0396 | Rotate Function | Python | Medium |
| 0397 | Integer Replacement | Python | Medium |
| 0398 | Random Pick Index | Python | Medium |
| 0399 | Evaluate Division | Python | Medium |
| 0400 | Nth Digit | Python | Medium |
| 0401 | Binary Watch | Python | Easy |
| 0402 | Remove K Digits | Python | Medium |
| 0403 | Frog Jump | Python | Hard |
| 0404 | Sum of Left Leaves | Python | Easy |
| 0405 | Convert a Number to Hexadecimal | Python | Easy |
| 0406 | Queue Reconstruction by Height | Python | Medium |
| 0407 | Trapping Rain Water II | Python | Hard |
| 0408 | Valid Word Abbreviation | Python | Easy |
| 0409 | Longest Palindrome | Python | Easy |
| 0416 | Partition Equal Subset Sum | Python | Medium |
| 0417 | Pacific Atlantic Water Flow | Python | Medium |
| 0424 | Longest Repeating Character Replacement | Python | Medium |
| 0426 | Convert Binary Search Tree to Sorted Doubly Linked List | Python | Medium |
| 0427 | Construct Quad Tree | Python | Medium |
| 0432 | All O`one Data Structure | Python | Hard |
| 0433 | Minimum Genetic Mutation | Python | Medium |
| 0435 | Non-overlapping Intervals | Python | Medium |
| 0437 | Path Sum III | Python | Medium |
| 0438 | Find All Anagrams in a String | Python | Medium |
| 0439 | Ternary Expression Parser | Python | Medium |
| 0440 | K-th Smallest in Lexicographical Order | Python | Hard |
| 0442 | Find All Duplicates in an Array | Python | Medium |
| 0443 | String Compression | Python | Medium |
| 0446 | Arithmetic Slices II - Subsequence | Python | Hard |
| 0450 | Delete Node in a BST | Python | Medium |
| 0451 | Sort Characters By Frequency | Python | Medium |
| 0452 | Minimum Number of Arrows to Burst Balloons | Python | Medium |
| 0455 | Assign Cookies | Python | Easy |
| 0456 | 132 Pattern | Python | Medium |
| 0458 | Poor Pigs | Python | Hard |
| 0459 | Repeated Substring Pattern | Python | Easy |
| 0463 | Island Perimeter | Python | Easy |
| 0473 | Matchsticks to Square | Python | Medium |
| 0476 | Number Complement | Python | Easy |
| 0486 | Predict the Winner | Python | Medium |
| 0487 | Max Consecutive Ones II | Python | Medium |
| 0489 | Robot Room Cleaner | Python | Hard |
| 0490 | The Maze | Python | Medium |
| 0494 | Target Sum | Python | Medium |
| 0501 | Find Mode in Binary Search Tree | Python | Easy |
| 0502 | IPO | Python | Hard |
| 0505 | The Maze II | Python | Medium |
| 0506 | Relative Ranks | Python | Easy |
| 0509 | Fibonacci Number | Python | Easy |
| 0513 | Find Bottom Left Tree Value | Python | Medium |
| 0514 | Freedom Trail | Python | Hard |
| 0515 | Find Largest Value in Each Tree Row | Python | Medium |
| 0516 | Longest Palindromic Subsequence | Python | Medium |
| 0518 | Coin Change 2 | Python | Medium |
| 0523 | Continuous Subarray Sum | Python | Medium |
| 0525 | Contiguous Array | Python | Medium |
| 0528 | Random Pick with Weight | Python | Medium |
| 0530 | Minimum Absolute Difference in BST | Python | Easy |
| 0532 | K-diff Pairs in an Array | Python | Easy |
| 0539 | Minimum Time Difference | Python | Medium |
| 0540 | Single Element in a Sorted Array | Python | Medium |
| 0542 | 01 Matrix | Python | Medium |
| 0543 | Diameter of Binary Tree | Python | Easy |
| 0545 | Boundary of Binary Tree | Python | Medium |
| 0547 | Number of Provinces | Python | Medium |
| 0552 | Student Attendance Record II | Python | Hard |
| 0557 | Reverse Words in a String III | C++ | Easy |
| 0560 | Subarray Sum Equals K | Python | Medium |
| 0561 | Array Partition I | Python | Easy |
| 0564 | Find the Closest Palindrome | Python | Hard |
| 0566 | Reshape the Matrix | C++ | Easy |
| 0567 | Permutation in String | Python | Medium |
| 0570 | Managers with at Least 5 Direct Reports | SQL | Medium |
| 0572 | Subtree of Another Tree | Python | Easy |
| 0573 | Squirrel Simulation | Python | Medium |
| 0576 | Out of Boundary Paths | Python | Medium |
| 0577 | Employee Bonus | SQL | Easy |
| 0584 | Find Customer Referee | SQL | Easy |
| 0588 | Design In-Memory File System | Python | Hard |
| 0590 | N-ary Tree Postorder Traversal | Python | Easy |
| 0592 | Fraction Addition and Subtraction | Python | Medium |
| 0595 | Big Countries | SQL | Easy |
| 0605 | Can Place Flowers | Python | Easy |
| 0606 | Construct String from Binary Tree | Python | Easy |
| 0617 | Merge Two Binary Trees | C++ | Easy |
| 0620 | Not Boring Movies | SQL | Easy |
| 0621 | Task Scheduler | Python | Medium |
| 0623 | Add One Row to Tree | Python | Medium |
| 0624 | Maximum Distance in Arrays | Python | Easy |
| 0629 | K Inverse Pairs Array | Python | Hard |
| 0632 | Smallest Range Covering Elements from K Lists | Python | [Hard](./ |
| 0633 | Sum of Square Numbers | Python | Medium |
| 0637 | Average of Levels in Binary Tree | Python | Easy |
| 0641 | Design Circular Deque | Python | Medium |
| 0643 | Maximum Average Subarray I | Python | Easy |
| 0645 | Set Mismatch | Python | Easy |
| 0646 | Maximum Length of Pair Chain | Python | Medium |
| 0647 | Palindromic Substrings | Python | Medium |
| 0648 | Replace Words | Python | Medium |
| 0649 | Dota2 Senate | Python | Medium |
| 0650 | 2 Keys Keyboard | Python | Medium |
| 0653 | Two Sum IV - Input is a BST | C++ | Easy |
| 0658 | Find K Closest Elements | Python | Medium |
| 0661 | Image Smoother | Python | Easy |
| 0662 | Maximum Width of Binary Tree | Python | Medium |
| 0664 | Strange Printer | Python | Hard |
| 0666 | Path Sum IV | Python | Medium |
| 0670 | Maximum Swap | Python | Medium |
| 0678 | Valid Parenthesis String | Python | Medium |
| 0684 | Redundant Connection | Python | Medium |
| 0692 | Top K Frequent Words | Python | Medium |
| 0694 | Number of Distinct Islands | Python | Medium |
| 0695 | Max Area of Island | C++ | Medium |
| 0700 | Search in a Binary Search Tree | C++ | Easy |
| 0701 | Insert into a Binary Search Tree | C++ | Medium |
| 0703 | Kth Largest Element in a Stream | Python | Easy |
| 0704 | Binary Search | Pythoon | Easy |
| 0706 | Design HashMap | Python | Easy |
| 0712 | Minimum ASCII Delete Sum for Two Strings | Python | Medium |
| 0713 | Subarray Product Less Than K | Python | Medium |
| 0714 | Best Time to Buy and Sell Stock with Transaction Fee | Python | Medium |
| 0718 | Maximum Length of Repeated Subarray | Python | Medium |
| 0719 | Find K-th Smallest Pair Distance | Python | Hard |
| 0721 | Accounts Merge | Python | Medium |
| 0723 | Candy Crush | Python | Medium |
| 0724 | Find Pivot Index | Python | Easy |
| 0725 | Split Linked List in Parts | Python | Medium |
| 0726 | Number of Atoms | Python | Hard |
| 0729 | My Calendar I | Python | Medium |
| 0731 | My Calendar II | Python | Medium |
| 0733 | Flood Fill | Python | Easy |
| 0734 | Sentence Similarity | Python | Easy |
| 0735 | Asteroid Collision | Python | Medium |
| 0737 | Sentence Similarity II | Python | Medium |
| 0739 | Daily Temperatures | Python | Medium |
| 0740 | Delete and Earn | Python | Medium |
| 0741 | Cherry Pickup | Python | Hard |
| 0743 | Network Delay Time | Python | Medium |
| 0744 | Find Smallest Letter Greater Than Target | Python | Easy |
| 0746 | Min Cost Climbing Stairs | Python | Easy |
| 0752 | Open the Lock | Python | Medium |
| 0759 | Employee Free Time | Python | Hard |
| 0767 | Reorganize String | Python | Medium |
| 0773 | Sliding Puzzle | Python | Hard |
| 0776 | Split BST | Python | Medium |
| 0778 | Swim in Rising Water | Python | Hard |
| 0779 | K-th Symbol in Grammar | Python | Medium |
| 0784 | Letter Case Permutation | C++ | Medium |
| 0786 | K-th Smallest Prime Fraction | Python | Medium |
| 0787 | Cheapest Flights Within K Stops | Python | Medium |
| 0790 | Domino and Tromino Tiling | Python | Medium |
| 0791 | Custom Sort String | Python | Medium |
| 0797 | All Paths From Source to Target | Python | Medium |
| 0799 | Champagne Tower | Python | Medium |
| 0808 | Soup Servings | Python | Medium |
| 0815 | Bus Routes | Python | Hard |
| 0823 | Binary Trees With Factors | Python | Medium |
| 0826 | Most Profit Assigning Work | Python | Medium |
| 0834 | Sum of Distances in Tree | Python | Hard |
| 0840 | Magic Squares In Grid | Python | Medium |
| 0841 | Keys and Rooms | Python | Medium |
| 0844 | Backspace String Compare | Python | Easy |
| 0846 | Hand of Straights | Python | Medium |
| 0847 | Shortest Path Visiting All Nodes | Python | Hard |
| 0852 | Peak Index in a Mountain Array | Python | Easy |
| 0857 | Minimum Cost to Hire K Workers | Python | Hard |
| 0860 | Lemonade Change | Python | Easy |
| 0861 | Score After Flipping Matrix | Python | Medium |
| 0862 | Shortest Subarray with Sum at Least K | Python | Hard |
| 0863 | All Nodes Distance K in Binary Tree | Python | Medium |
| 0867 | Transpose Matrix | Python | Easy |
| 0872 | Leaf-Similar Trees | Python | Easy |
| 0874 | Walking Robot Simulation | Python | Medium |
| 0875 | Koko Eating Bananas | Python | Medium |
| 0876 | Middle of the Linked List | Python | Easy |
| 0880 | Decoded String at Index | Python | Medium |
| 0881 | Boats to Save People | Python | Medium |
| 0884 | Uncommon Words from Two Sentences | Python | Easy |
| 0885 | Spiral Matrix III | Python | Medium |
| 0888 | Fair Candy Swap | Python | Easy |
| 0894 | All Possible Full Binary Trees | Python | Medium |
| 0895 | Maximum Frequency Stack | Python | Hard |
| 0896 | Monotonic Array | Python | Easy |
| 0901 | Online Stock Span | Python | Medium |
| 0905 | Sort Array By Parity | Python | Easy |
| 0907 | Sum of Subarray Minimums | Python | Medium |
| 0909 | Snakes and Ladders | Python | Medium |
| 0912 | Sort an Array | Python | Medium |
| 0918 | Maximum Sum Circular Subarray | Python | Medium |
| 0920 | Number of Music Playlists | Python | Hard |
| 0921 | Minimum Add to Make Parentheses Valid | Python | Medium |
| 0924 | Minimize Malware Spread | Python | Hard |
| 0930 | Binary Subarrays With Sum | Python | Medium |
| 0931 | Minimum Falling Path Sum | Python | Medium |
| 0933 | Number of Recent Calls | Python | Easy |
| 0935 | Knight Dialer | Python | Medium |
| 0938 | Range Sum of BST | Python | Easy |
| 0939 | Minimum Area Rectangle | Python | Medium |
| 0945 | Minimum Increment to Make Array Unique | Python | Medium |
| 0947 | Most Stones Removed with Same Row or Column | Python | Medium |
| 0948 | Bag of Tokens | Python | Medium |
| 0950 | Reveal Cards In Increasing Order | Python | Medium |
| 0951 | Flip Equivalent Binary Trees | Python | Medium |
| 0959 | Regions Cut By Slashes | Python | Medium |
| 0962 | Maximum Width Ramp | Python | Medium |
| 0973 | K Closest Points to Origin | Python | Medium |
| 0974 | Subarray Sums Divisible by K | Python | Medium |
| 0977 | Squares of a Sorted Array | Python | Easy |
| 0979 | Distribute Coins in Binary Tree | Python | Medium |
| 0981 | Time Based Key-Value Store | Python | Medium |
| 0988 | Smallest String Starting From Leaf | Python | Medium |
| 0992 | Subarrays with K Different Integers | Python | Hard |
| 0993 | Cousins in Binary Tree | Python | Easy |
| 0994 | Rotting Oranges | Python | Medium |
| 0995 | Minimum Number of K Consecutive Bit Flips | Python | Hard |
| 0997 | Find the Town Judge | Python | Easy |
| 1002 | Find Common Characters | Python | Easy |
| 1004 | Max Consecutive Ones III | Python | Medium |
| 1010 | Pairs of Songs With Total Durations Divisible by 60 | Python | Medium |
| 1011 | Capacity To Ship Packages Within D Days | Python | Medium |
| 1026 | Maximum Difference Between Node and Ancestor | Python | Medium |
| 1038 | Binary Search Tree to Greater Sum Tree | Python | Medium |
| 1043 | Partition Array for Maximum Sum | Python | Medium |
| 1046 | Last Stone Weight | Python | Easy |
| 1048 | Longest String Chain | Python | Medium |
| 1051 | Height Checker | Python | Easy |
| 1052 | Grumpy Bookstore Owner | Python | Medium |
| 1057 | Campus Bikes | Python | Medium |
| 1060 | Missing Element in Sorted Array | Python | Medium |
| 1062 | Longest Repeating Substring | Python | Medium |
| 1063 | Number of Valid Subarrays | Python | Hard |
| 1066 | Campus Bikes II | Python | Medium |
| 1068 | Product Sales Analysis I | SQL | Easy |
| 1071 | Greatest Common Divisor of Strings | Python | Easy |
| 1072 | Flip Columns For Maximum Number of Equal Rows | Python | Medium |
| 1074 | Number of Submatrices That Sum to Target | Python | Hard |
| 1075 | Project Employees I | SQL | Easy |
| 1092 | Shortest Common Supersequence | Python | Hard |
| 1095 | Find in Mountain Array | Python | Hard |
| 1099 | Two Sum Less Than K | Python | Easy |
| 1101 | The Earliest Moment When Everyone Become Friends | Python | Medium |
| 1105 | Filling Bookcase Shelves | Python | Medium |
| 1106 | Parsing A Boolean Expression | Python | Hard |
| 1110 | Delete Nodes And Return Forest | Python | Medium |
| 1119 | Remove Vowels from a String | Python | Easy |
| 1120 | Maximum Average Subtree | Python | Medium |
| 1122 | Relative Sort Array | Python | Easy |
| 1133 | Largest Unique Number | Python | Easy |
| 1136 | Parallel Courses | Python | Hard |
| 1137 | N-th Tribonacci Number | Python | Easy |
| 1140 | Stone Game II | Python | Medium |
| 1143 | Longest Common Subsequence | Python | Medium |
| 1146 | Snapshot Array | Python | Medium |
| 1148 | Article Views I | SQL | Easy |
| 1151 | Minimum Swaps to Group All 1's Together | Python | Medium |
| 1155 | Number of Dice Rolls With Target Sum | Python | Medium |
| 1160 | Find Words That Can Be Formed by Characters | Python | Easy |
| 1161 | Maximum Level Sum of a Binary Tree | Python | Medium |
| 1165 | Single Row Keyboard | Python | Easy |
| 1167 | Minimum Cost to Connect Sticks | Python | Medium |
| 1168 | Optimize Water Distribution in a Village | Python | Hard |
| 1171 | Remove Zero Sum Consecutive Nodes from Linked List | Python | Medium |
| 1183 | Maximum Number of Ones | Python | Hard |
| 1190 | Reverse Substrings Between Each Pair of Parentheses | Python | Medium |
| 1197 | Minimum Knight Moves | Python | Medium |
| 1199 | Minimum Time to Build Blocks | Python | Hard |
| 1202 | Smallest String With Swaps | Python | Medium |
| 1203 | Sort Items by Groups Respecting Dependencies | Python | Hard |
| 1207 | Unique Number of Occurrences | Python | Easy |
| 1208 | Get Equal Substrings Within Budget | Python | Medium |
| 1216 | Valid Palindrome III | Python | Hard |
| 1219 | Path with Maximum Gold | Python | Medium |
| 1220 | Count Vowels Permutation | Python | Hard |
| 1230 | Toss Strange Coins | Python | Medium |
| 1233 | Remove Sub-Folders from the Filesystem | Python | Medium |
| 1235 | Maximum Profit in Job Scheduling | Python | Hard |
| 1239 | Maximum Length of a Concatenated String with Unique Characters | Python | Medium |
| 1245 | Tree Diameter | Python | Medium |
| 1248 | Count Number of Nice Subarrays | Python | Medium |
| 1249 | Minimum Remove to Make Valid Parentheses | Python | Medium |
| 1251 | Average Selling Price | SQL | Easy |
| 1254 | Number of Closed Islands | Python | Medium |
| 1255 | Maximum Score Words Formed by Letters | Python | Hard |
| 1257 | Smallest Common Region | Python | Medium |
| 1265 | Print Immutable Linked List in Reverse | C++ | Medium |
| 1266 | Minimum Time Visiting All Points | Python | Easy |
| 1268 | Search Suggestions System | Python | Medium |
| 1269 | Number of Ways to Stay in the Same Place After Some Steps | Python | Hard |
| 1272 | Remove Interval | Python | Medium |
| 1277 | Count Square Submatrices with All Ones | Python | Medium |
| 1280 | Students and Examinations | SQL | Easy |
| 1282 | Group the People Given the Group Size They Belong To | Python | Medium |
| 1287 | Element Appearing More Than 25% In Sorted Array | Python | Easy |
| 1289 | Minimum Falling Path Sum II | Python | Hard |
| 1291 | Sequential Digits | Python | Medium |
| 1310 | XOR Queries of a Subarray | Python | Medium |
| 1318 | Minimum Flips to Make A or B Equal to C | Python | Medium |
| 1325 | Delete Leaves With a Given Value | Python | Medium |
| 1326 | Minimum Number of Taps to Open to Water a Garden | Python | Hard |
| 1331 | Rank Transform of an Array | Python | Easy |
| 1334 | Find the City With the Smallest Number of Neighbors at a Threshold Distance | Python | Medium |
| 1335 | Minimum Difficulty of a Job Schedule | Python | Hard |
| 1337 | The K Weakest Rows in a Matrix | Python | Easy |
| 1346 | Check If N and Its Double Exist | Python | Easy |
| 1347 | Minimum Number of Steps to Make Two Strings Anagram | Python | Medium |
| 1351 | Count Negative Numbers in a Sorted Matrix | Python | Easy |
| 1356 | Sort Integers by The Number of 1 Bits | Python | Easy |
| 1359 | Count All Valid Pickup and Delivery Options | Python | Hard |
| 1360 | Number of Days Between Two Dates | Python | Easy |
| 1361 | Validate Binary Tree Nodes | Python | Medium |
| 1367 | Linked List in Binary Tree | Python | Medium |
| 1371 | Find the Longest Substring Containing Vowels in Even Counts | Python | Medium |
| 1372 | Longest ZigZag Path in a Binary Tree | Python | Medium |
| 1378 | Replace Employee ID With The Unique Identifier | SQL | Easy |
| 1380 | Lucky Numbers in a Matrix | Python | Easy |
| 1381 | Design a Stack With Increment Operation | Python | Medium |
| 1382 | Balance a Binary Search Tree | Python | Medium |
| 1395 | Count Number of Teams | Python | Medium |
| 1404 | Number of Steps to Reduce a Number in Binary Representation to One | Python | Medium |
| 1405 | Longest Happy String | Python | Medium |
| 1420 | Build Array Where You Can Find The Maximum Exactly K Comparisons | Python | Hard |
| 1422 | Maximum Score After Splitting a String | Python | Easy |
| 1424 | Diagonal Traverse II | Python | Medium |
| 1425 | Constrained Subsequence Sum | Python | Hard |
| 1428 | Leftmost Column with at Least a One | Python | Medium |
| 1429 | First Unique Number | Python | Medium |
| 1431 | Kids With the Greatest Number of Candies | Python | Easy |
| 1436 | Destination City | Python | Easy |
| 1438 | Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit | Python | Medium |
| 1441 | Build an Array With Stack Operations | Python | Easy |
| 1442 | Count Triplets That Can Form Two Arrays of Equal XOR | Python | Medium |
| 1448 | Count Good Nodes in Binary Tree | Python | Medium |
| 1455 | Check If a Word Occurs as a Prefix of Any Word in a Sentence | Python | Easy |
| 1456 | Maximum Number of Vowels in a Substring of Given Length | Python | Medium |
| 1457 | Pseudo-Palindromic Paths in a Binary Tree | Python | Medium |
| 1458 | Max Dot Product of Two Subsequences | Python | Hard |
| 1460 | Make Two Arrays Equal by Reversing Subarrays | Python | Easy |
| 1463 | Cherry Pickup II | Python | Hard |
| 1464 | Maximum Product of Two Elements in an Array | Python | Easy |
| 1466 | Reorder Routes to Make All Paths Lead to the City Zero | Python | Medium |
| 1469 | Find All The Lonely Nodes | Python | Easy |
| 1470 | Shuffle the Array | Python | Easy |
| 1481 | Least Number of Unique Integers after K Removals | Python | Medium |
| 1482 | Minimum Number of Days to Make m Bouquets | Python | Medium |
| 1489 | Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree | Python | Hard |
| 1493 | Longest Subarray of 1's After Deleting One Element | Python | Medium |
| 1496 | Path Crossing | Python | Easy |
| 1497 | Check If Array Pairs Are Divisible by k | Python | Medium |
| 1508 | Range Sum of Sorted Subarray Sums | Python | Medium |
| 1509 | Minimum Difference Between Largest and Smallest Value in Three Moves | Python | Medium |
| 1512 | Number of Good Pairs | Python | Easy |
| 1514 | Path with Maximum Probability | Python | Medium |
| 1518 | Water Bottles | Python | Easy |
| 1530 | Number of Good Leaf Nodes Pairs | Python | Medium |
| 1531 | String Compression II | Python | Hard |
| 1535 | Find the Winner of an Array Game | Python | Medium |
| 1544 | Make The String Great | Python | Easy |
| 1545 | Find Kth Bit in Nth Binary String | Python | Medium |
| 1550 | Three Consecutive Odds | Python | Medium |
| 1552 | Magnetic Force Between Two Balls | Python | Medium |
| 1561 | Maximum Number of Coins You Can Get | Python | Medium |
| 1568 | Minimum Number of Days to Disconnect Island | Python | Hard |
| 1574 | Shortest Subarray to be Removed to Make Array Sorted | Python | Medium |
| 1578 | Minimum Deletion Cost to Avoid Repeating Letters | Python | Medium |
| 1579 | Remove Max Number of Edges to Keep Graph Fully Traversable | Python | Hard |
| 1580 | Put Boxes Into the Warehouse II | Python | Medium |
| 1581 | Customer Who Visited but Did Not Make Any Transactions | SQL | Easy |
| 1582 | Special Positions in a Binary Matrix | Python | Easy |
| 1584 | Min Cost to Connect All Points | Python | Medium |
| 1590 | Make Sum Divisible by P | Python | Medium |
| 1593 | Split a String Into the Max Number of Unique Substrings | Python | Medium |
| 1598 | Crawler Log Folder | Python | Easy |
| 1605 | Find Valid Matrix Given Row and Column Sums | Python | Medium |
| 1608 | Special Array With X Elements Greater Than or Equal X | Python | Easy |
| 1609 | Even Odd Tree | Python | Medium |
| 1611 | Minimum One Bit Operations to Make Integers Zero | Python | Hard |
| 1614 | Maximum Nesting Depth of the Parentheses | Python | Easy |
| 1615 | Maximal Network Rank | Python | Medium |
| 1630 | Arithmetic Subarrays | Python | Medium |
| 1631 | Path With Minimum Effort | Python | Medium |
| 1633 | Percentage of Users Attended a Contest | SQL | Easy |
| 1634 | Add Two Polynomials Represented as Linked Lists | Python | Medium |
| 1636 | Sort Array by Increasing Frequency | Python | Easy |
| 1637 | Widest Vertical Area Between Two Points Containing No Points | Python | Medium |
| 1639 | Number of Ways to Form a Target String Given a Dictionary | Python | Hard |
| 1642 | Furthest Building You Can Reach | Python | Medium |
| 1647 | Minimum Deletions to Make Character Frequencies Unique | Python | Medium |
| 1652 | Defuse the Bomb | Python | Easy |
| 1653 | Minimum Deletions to Make String Balanced | Python | Medium |
| 1657 | Determine if Two Strings Are Close | Python | Medium |
| 1658 | Minimum Operations to Reduce X to Zero | Python | Medium |
| 1660 | Correct a Binary Tree | Python | Medium |
| 1661 | Average Time of Process per Machine | SQL | Easy |
| 1662 | Check If Two String Arrays are Equivalent | Python | Easy |
| 1669 | Merge In Between Linked Lists | Python | Medium |
| 1671 | Minimum Number of Removals to Make Mountain Array | Python | Hard |
| 1679 | Max Number of K-Sum Pairs | Python | Medium |
| 1683 | Invalid Tweets | SQL | Easy |
| 1684 | Count the Number of Consistent Strings | Python | Easy |
| 1685 | Sum of Absolute Differences in a Sorted Array | Python | Medium |
| 1688 | Count of Matches in Tournament | Python | Easy |
| 1700 | Number of Students Unable to Eat Lunch | Python | Easy |
| 1701 | Average Waiting Time | Python | Medium |
| 1704 | Determine if String Halves Are Alike | Python | Easy |
| 1716 | Calculate Money in Leetcode Bank | Python | Easy |
| 1717 | Maximum Score From Removing Substrings | Python | Medium |
| 1721 | Swapping Nodes in a Linked List | Python | Medium |
| 1727 | Largest Submatrix With Rearrangements | Python | Medium |
| 1730 | Shortest Path to Get Food | Python | Medium |
| 1732 | Find the Highest Altitude | Python | Easy |
| 1740 | Find Distance in a Binary Tree | Python | Medium |
| 1743 | Restore the Array From Adjacent Pairs | Python | Medium |
| 1750 | Minimum Length of String After Deleting Similar Ends | Python | Medium |
| 1757 | Recyclable and Low Fat Products | SQL | Medium |
| 1758 | Minimum Changes To Make Alternating Binary String | Python | Easy |
| 1759 | Count Number of Homogenous Substrings | Python | Medium |
| 1760 | Minimum Limit of Balls in a Bag | Python | Medium |
| 1768 | Merge Strings Alternately | Python | Easy |
| 1770 | Maximum Score from Performing Multiplication Operations | Python | Hard |
| 1791 | Find Center of Star Graph | Python | Easy |
| 1793 | Maximum Score of a Good Subarray | Python | Hard |
| 1802 | Maximum Value at a Given Index in a Bounded Array | Python | Medium |
| 1804 | Implement Trie II (Prefix Tree) | Python | Medium |
| 1813 | Sentence Similarity III | Python | Medium |
| 1814 | Count Nice Pairs in an Array | Python | Medium |
| 1829 | Maximum XOR for Each Query | Python | Medium |
| 1834 | Single-Threaded CPU | Python | Medium |
| 1836 | Remove Duplicates from an Unsorted Linked List | Python | Medium |
| 1838 | Frequency of the Most Frequent Element | Python | Medium |
| 1845 | Seat Reservation Manager | Python | Medium |
| 1846 | Maximum Element After Decreasing and Rearranging | Python | Medium |
| 1858 | Longest Word With All Prefixes | Python | Medium |
| 1861 | Rotating the Box | Python | Medium |
| 1863 | Sum of All Subset XOR Totals | Python | Easy |
| 1870 | Minimum Speed to Arrive on Time | Python | Medium |
| 1877 | Minimize Maximum Pair Sum in Array | Python | Medium |
| 1885 | Count Pairs in Two Arrays | Python | Medium |
| 1887 | Reduction Operations to Make the Array Elements Equal | Python | Medium |
| 1891 | Cutting Ribbons | Python | Medium |
| 1894 | Find the Student That Will Replace the Chalk | Python | Medium |
| 1897 | Redistribute Characters to Make All Strings Equal | Python | Easy |
| 1898 | Maximum Number of Removable Characters | Python | Medium |
| 1899 | Merge Triplets to Form Target Triplet | Python | Medium |
| 1903 | Largest Odd Number in String | Python | Easy |
| 1905 | Count Sub Islands | Python | Medium |
| 1913 | Maximum Product Difference Between Two Pairs | Python | Easy |
| 1915 | Number of Wonderful Substrings | Python | Medium |
| 1920 | Build Array from Permutation | C++ | Easy |
| 1921 | Eliminate Maximum Number of Monsters | Python | Medium |
| 1926 | Nearest Exit from Entrance in Maze | Python | Medium |
| 1930 | Unique Length-3 Palindromic Subsequences | Python | Medium |
| 1934 | Confirmation Rate | SQL | Medium |
| 1937 | Maximum Number of Points with Cost | Python | Medium |
| 1940 | Longest Common Subsequence Between Sorted Arrays | Python | Medium |
| 1942 | The Number of the Smallest Unoccupied Chair | Python | Medium |
| 1945 | Sum of Digits of String After Convert | Python | Easy |
| 1957 | Delete Characters to Make Fancy String | Python | Easy |
| 1963 | Minimum Number of Swaps to Make the String Balanced | Python | Medium |
| 1971 | Find if Path Exists in Graph | Python | Easy |
| 1973 | Count Nodes Equal to Sum of Descendants | Python | Medium |
| 1975 | Maximum Matrix Sum | Python | Medium |
| 1980 | Find Unique Binary String | Python | Medium |
| 1992 | Find All Groups of Farmland | Python | Medium |
| 2000 | Reverse Prefix of Word | Python | Easy |
| 2002 | Maximum Product of the Length of Two Palindromic Subsequences | Python | Medium |
| 2009 | Minimum Number of Operations to Make Array Continuous | Python | Hard |
| 2013 | Detect Squares | Python | Medium |
| 2022 | Convert 1D Array Into 2D Array | Python | Easy |
| 2028 | Find Missing Observations | Python | Medium |
| 2037 | Minimum Number of Moves to Seat Everyone | Python | Easy |
| 2038 | Remove Colored Pieces if Both Neighbors are the Same Color | Python | Medium |
| 2044 | Count Number of Maximum Bitwise OR Subsets | Python | Medium |
| 2045 | Second Minimum Time to Reach Destination | Python | Hard |
| 2050 | Number of Different Integers in a String | Python | Easy |
| 2053 | Kth Distinct String in an Array | Python | Easy |
| 2054 | Two Best Non-Overlapping Events | Python | Medium |
| 2058 | Find the Minimum and Maximum Number of Nodes Between Critical Points | Python | Medium |
| 2061 | Number of Spaces Cleaning Robot Cleaned | Python | Medium |
| 2062 | Count Vowel Substrings of a String | Python | Easy |
| 2064 | Minimized Maximum of Products Distributed to Any Store | Python | Medium |
| 2070 | Most Beautiful Item for Each Query | Python | Medium |
| 2073 | Time Needed to Buy Tickets | Python | Easy |
| 2083 | Substrings That Begin and End With the Same Letter | Python | Medium |
| 2092 | Find All People With Secret | Python | Hard |
| 2093 | Minimum Cost to Reach City With Discounts | Python | Medium |
| 2095 | Delete the Middle Node of a Linked List | Python | Medium |
| 2096 | Step-By-Step Directions From a Binary Tree Node to Another | Python | Medium |
| 2097 | Valid Arrangement of Pairs | Python | Hard |
| 2101 | Detonate the Maximum Bombs | Python | Medium |
| 2107 | Number of Unique Flavors After Sharing K Candies | Python | Medium |
| 2108 | Find First Palindromic String in the Array | Python | Medium |
| 2109 | Adding Spaces to a String | Python | Medium |
| 2125 | Number of Laser Beams in a Bank | Python | Medium |
| 2130 | Maximum Twin Sum of a Linked List | Python | Medium |
| 2134 | Minimum Swaps to Group All 1's Together II | Python | Medium |
| 2141 | Maximum Running Time of N Computers | Python | Hard |
| 2147 | Number of Ways to Divide a Long Corridor | Python | Hard |
| 2149 | Rearrange Array Elements by Sign | Python | Medium |
| 2181 | Merge Nodes in Between Zeros | Python | Medium |
| 2192 | All Ancestors of a Node in a Directed Acyclic Graph | Python | Medium |
| 2196 | Create Binary Tree From Descriptions | Python | Medium |
| 2204 | Distance to a Cycle in Undirected Graph | Python | Hard |
| 2215 | Find the Difference of Two Arrays | Python | Easy |
| 2220 | Minimum Bit Flips to Convert Number | Python | Easy |
| 2225 | Find Players With Zero or One Losses | Python | Medium |
| 2251 | Number of Flowers in Full Bloom | Python | Hard |
| 2257 | Count Unguarded Cells in the Grid | Python | Medium |
| 2264 | Largest 3-Same-Digit Number in String | Python | Easy |
| 2265 | Count Nodes Equal to Average of Subtree | Python | Medium |
| 2275 | Largest Combination With Bitwise AND Greater Than Zero | Python | Medium |
| 2285 | Maximum Total Importance of Roads | Python | Medium |
| 2290 | Minimum Obstacle Removal to Reach Corner | Python | Hard |
| 2291 | Maximum Profit From Trading Stocks | Python | Medium |
| 2300 | Successful Pairs of Spells and Potions | Python | Medium |
| 2303 | Calculate Amount Paid in Taxes | Python | Easy |
| 2331 | Evaluate Boolean Binary Tree | Python | Easy |
| 2334 | Subarray With Elements Greater Than Varying Threshold | Python | Hard |
| 2336 | Smallest Number in Infinite Set | Python | Medium |
| 2337 | Move Pieces to Obtain a String | Python | Medium |
| 2352 | Equal Row and Column Pairs | Python | Medium |
| 2353 | Design a Food Rating System | Python | Medium |
| 2355 | Maximum Number of Books You Can Take | Python | Hard |
| 2361 | Minimum Costs Using the Train Line | Python | Hard |
| 2366 | Minimum Replacements to Sort the Array | Python | Hard |
| 2369 | Check If There Is a Valid Partition for the Array | Python | Medium |
| 2370 | Longest Ideal Subsequence | Python | Medium |
| 2371 | Minimize Maximum Value in a Grid | Python | Hard |
| 2373 | Largest Local Values in a Matrix | Python | Easy |
| 2385 | Amount of Time for Binary Tree to be Infected | Python | Medium |
| 2390 | Removing Stars From a String | Python | Medium |
| 2391 | Minimum Amount of Time to Collect Garbage | Python | Medium |
| 2392 | Build a Matrix With Conditions | Python | Hard |
| 2393 | Count Strictly Increasing Subarrays | Python | Medium |
| 2402 | Meeting Rooms III | Python | Hard |
| 2406 | Divide Intervals Into Minimum Number of Groups | Python | Medium |
| 2416 | Sum of Prefix Scores of Strings | Python | Hard |
| 2418 | Sort the People | Python | Easy |
| 2419 | Longest Subarray With Maximum Bitwise AND | Python | Medium |
| 2433 | Find the Original Array of Prefix XOR | Python | Medium |
| 2439 | Minimize Maximum of Array | Python | Medium |
| 2441 | Largest Positive Integer That Exists With Its Negative | Python | Easy |
| 2444 | Count Subarrays with Fixed Bounds | Python | Hard |
| 2458 | Height of Binary Tree After Subtree Removal Queries | Python | Hard |
| 2461 | Maximum Sum of Distinct Subarrays With Length K | Python | Medium |
| 2462 | Total Cost to Hire K Workers | Python | Medium |
| 2463 | Minimum Total Distance Traveled | Python | Hard |
| 2473 | Minimum Cost to Buy Apples | Python | Medium |
| 2482 | Difference Between Ones and Zeros in Row and Column | Python | Medium |
| 2483 | Minimum Penalty for a Shop | Python | Medium |
| 2485 | Find the Pivot Integer | Python | Easy |
| 2486 | Append Characters to String to Make Subsequence | Python | Medium |
| 2487 | Remove Nodes from Linked List | Python | Medium |
| 2490 | Circular Sentence | Python | Easy |
| 2491 | Divide Players Into Teams of Equal Skill | Python | Medium |
| 2501 | Longest Square Streak in an Array | Python | Medium |
| 2505 | Bitwise OR of All Subarrays | Python | Medium |
| 2516 | Take K of Each Character From Left and Right | Python | Medium |
| 2530 | Maximal Score After Applying K Operations | Python | Medium |
| 2540 | Minimum Common Value | Python | Easy |
| 2542 | Maximum Subsequence Score | Python | Medium |
| 2554 | Maximum Number of Integers to Choose From a Range I | Python | Medium |
| 2563 | Count the Number of Fair Pairs | Python | Medium |
| 2577 | Minimum Time to Visit a Cell in a Grid | Python | Hard |
| 2582 | Pass the Pillow | Python | Easy |
| 2583 | Kth Largest Sum in a Binary Tree | Python | Medium |
| 2592 | Maximize Greatness of an Array | Python | Medium |
| 2597 | The Number of Beautiful Subsets | Python | Medium |
| 2601 | Prime Subtraction Operation | Python | Medium |
| 2610 | Convert an Array into a 2D Array with Conditions | Python | Medium |
| 2616 | Minimize the Maximum Difference of Pairs | Python | Medium |
| 2618 | Check if Object Instance of Class | TypeScript | Medium |
| 2619 | Array.prototype.last | JavaScript | Easy |
| 2620 | Counter | JavaScript | Easy |
| 2621 | Sleep | JavaScript | Easy |
| 2622 | Cache with Time Limit | JavaScript | Medium |
| 2623 | Memoize | JavaScript | Medium |
| 2624 | Snail Traversal | TypeScript | Medium |
| 2625 | Flatten Deeply Nested Array | JavaScript | Medium |
| 2626 | Array Reduce Transformation | JavaScript | Easy |
| 2627 | Debounce | JavaScript | Medium |
| 2628 | JSON Deep Equal | JavaScript | Medium |
| 2629 | Function Composition | JavaScript | Easy |
| 2630 | Memoize II | TypeScript | Hard |
| 2631 | Group By | JavaScript | Medium |
| 2632 | Curry | JavaScript | Medium |
| 2633 | Convert Object to JSON String | JavaScript | Medium |
| 2634 | Filter Elements from Array | JavaScript | Easy |
| 2635 | Apply Transform over Each Element in Array | JavaScript | Easy |
| 2636 | Promise Pool | JavaScript | Medium |
| 2637 | Promise Time Limit | JavaScript | Medium |
| 2641 | Cousins in Binary Tree II | Python | Medium |
| 2642 | Design Graph with Shortest Path Calculator | Python | Hard |
| 2648 | Generate Fibonacci Sequence | TypeScript | Easy |
| 2649 | Nested Array Generator | TypeScript | Medium |
| 2650 | Design Cancellable Function | TypeScript | Hard |
| 2664 | The Knight's Tour | Python | Medium |
| 2665 | Counter II | JavaScript | Easy |
| 2666 | Allow One Function Call | JavaScript | Easy |
| 2667 | Create Hello World Function | JavaScript | Easy |
| 2675 | Array of Objects to Matrix | TypeScript | Hard |
| 2676 | Throttle | JavaScript | Medium |
| 2677 | Chunk Array | JavaScript | Easy |
| 2678 | Number of Senior Citizens | Python | Easy |
| 2684 | Maximum Number of Moves in a Grid | Python | Medium |
| 2690 | Infinite Method Object | TypeScript | Easy |
| 2692 | Make Object Immutable | TypeScript | Medium |
| 2694 | Event Emitter | JavaScript | Medium |
| 2695 | Array Wrapper | JavaScript | Easy |
| 2696 | Minimum String Length After Removing Substrings | Python | Easy |
| 2699 | Modify Graph Edge Weights | Python | Hard |
| 2703 | Return Length of Arguments Passed | JavaScript | Easy |
| 2704 | To Be or Not To Be | JavaScript | Easy |
| 2705 | Compact Object | JavaScript | Medium |
| 2706 | Buy Two Chocolates | Python | Easy |
| 2707 | Extra Characters in a String | Python | Medium |
| 2709 | Greatest Common Divisor Traversal | Python | Hard |
| 2715 | Execute Cancellable Function with Delay | JavaScript | Easy |
| 2721 | Execute Asynchronous Functions in Parallel | JavaScript | Medium |
| 2722 | Join Two Arrays by ID | JavaScript | Medium |
| 2723 | Add Two Promises | JavaScript | Easy |
| 2724 | Sort By | JavaScript | Easy |
| 2725 | Interval Cancellation | JavaScript | Easy |
| 2726 | Calculator with Method Chaining | JavaScript | Easy |
| 2727 | Is Object Empty | JavaScript | Easy |
| 2742 | Painting the Walls | Python | Hard |
| 2743 | Count Substrings Without Repeating Character | Python | Medium |
| 2751 | Robot Collisions | Python | Hard |
| 2762 | Continuous Subarrays | Python | Medium |
| 2771 | Longest Non-decreasing Subarray From Two Arrays | Python | Medium |
| 2778 | Sum of Squares of Special Elements | Python | Easy |
| 2784 | Check if Array is Good | Python | Easy |
| 2785 | Sort Vowels in a String | Python | Medium |
| 2788 | Split Strings by Separator | Python | Easy |
| 2789 | Largest Element in an Array after Merge Operations | Python | Medium |
| 2798 | Number of Employees Who Met the Target | Python | Easy |
| 2802 | Find the K-th Lucky Number | Python | Medium |
| 2806 | Account Balance after Rounded Purchase | Python | Easy |
| 2807 | Insert Greatest Common Divisors in Linked List | Python | Medium |
| 2810 | Faulty Keyboard | Python | Easy |
| 2811 | Check If It Is Possible to Split Array | Python | Medium |
| 2812 | Find the Safest Path in a Grid | Python | Medium |
| 2816 | Double a Number Represented as a Linked List | Python | Medium |
| 2824 | Count Pairs Whose Sum Is Less Than Target | Python | Easy |
| 2825 | Make String A Subsequence Using Cyclic Increments | Python | Medium |
| 2833 | Furthest Point from Origin | Python | Easy |
| 2834 | Find the Minimum Possible Sum of a Beautiful Array | Python | Medium |
| 2838 | Maximum Coins Heroes Can Collect | Python | Medium |
| 2849 | Determine if a Cell is Reachable at a Given Time | Python | Medium |
| 2856 | Minimum Array Length After Pair Removals | Python | Medium |
| 2864 | Maximum Odd Binary Number | Python | Easy |
| 2870 | Minimum Number of Operations to Make Array Empty | Python | Medium |
| 2877 | Create a DataFrame From List | Python | Easy |
| 2878 | Get the Size of a DataFrame | Python | Easy |
| 2879 | Display the First Three Rows | Python | Easy |
| 2880 | Select Data | Python | Easy |
| 2881 | Create a New Column | Python | Easy |
| 2882 | Drop Duplicate Rows | Python | Easy |
| 2883 | Drop Missing Data | Python | Easy |
| 2884 | Modify Columns | Python | Easy |
| 2885 | Rename Columns | Python | Easy |
| 2886 | Change Data Type | Python | Easy |
| 2887 | Fill Missing Data | Python | Easy |
| 2888 | Reshape Data: Concatenate | Python | Easy |
| 2889 | Reshape Data: Pivot | Python | Easy |
| 2890 | Reshape Data: Melt | Python | Easy |
| 2891 | Method Chaining | Python | Easy |
| 2914 | Minimum Number of Changes to Make Binary String Beautiful | Python | Medium |
| 2923 | Find Champion I | Python | Easy |
| 2924 | Find Champion II | Python | Medium |
| 2938 | Separate Black and White Balls | Python | Medium |
| 2955 | Number of Same-End Substrings | Python | Medium |
| 2958 | Length of Longest Subarray with at Most K Frequency | Python | Medium |
| 2962 | Count Subarrays Where Max Element Appears at Least K Times | Python | Medium |
| 2966 | Divide Array into Arrays with Max Difference | Python | Medium |
| 2971 | Find Polygon with the Largest Perimeter | Python | Medium |
| 2976 | Minimum Cost to Convert String I | Python | Medium |
| 2981 | Find Longest Special Substring That Occurs Thrice I | Python | Medium |
| 2985 | Calculate Compressed Mean | SQL | Easy |
| 2997 | Minimum Number of Operations to Make Array XOR Equal to Zero | Python | Medium |
| 3005 | Count Elements with Maximum Frequency | Python | Easy |
| 3011 | Find if Array Can Be Sorted | Python | Medium |
| 3016 | Minimum Number of Pushes to Type Word II | Python | Medium |
| 3020 | Find the Maximum Number of Elements in Subset | Python | Medium |
| 3043 | Find the Length of the Longest Common Prefix | Python | Medium |
| 3062 | Winner of the Linked List Game | Python | Easy |
| 3063 | Linked List Frequency | Python | Medium |
| 3068 | Find the Maximum Sum of Node Values | Python | Hard |
| 3075 | Maximize Happiness of Selected Children | Python | Medium |
| 3095 | Shortest Subarray with OR at Least K I | Python | Easy |
| 3097 | Shortest Subarray with OR at Least K II | Python | Medium |
| 3110 | Score of a String | Python | Easy |
| 3133 | Minimum Array End | Python | Medium |
| 3152 | Special Array II | Python | Medium |
| 3155 | Maximum Number of Upgradable Servers | Python | Medium |
| 3163 | String Compression III | Python | Medium |
| 3176 | Find the Maximum Length of a Good Subsequence I | Python | Medium |
| 3177 | Find the Maximum Length of a Good Subsequence II | Python | Medium |
| 3189 | Minimum Moves to Get a Peaceful Board | Python | Medium |
| 3217 | Delete Nodes From Linked List Present In Array | Python | Medium |
| 3243 | Shortest Distance After Road Addition Queries I | Python | Medium |
| 3280 | Convert Date to Binary | Python | Easy |
| 3281 | Maximize Score of Numbers in Ranges | Python | Medium |
| 3282 | Reach End of Array with Max Score | Python | Medium |
| 3285 | Find Indices of Stable Mountains | Python | Easy |
| 3286 | Find a Safe Walk Through a Grid | Python | Medium |
| 3289 | The Two Sneaky Numbers of Digitville | Python | Easy |
| 3290 | Maximum Multiplication Score | Python | Medium |
| 3295 | Report Spam Message | Python | Medium |
| 3296 | Minimum Number of Seconds to Make Mountain Height Zero | Python | Medium |
| 3300 | Minimum Element After Replacement With Digit Sum | Python | Easy |
| 3301 | Maximize the Total Height of Unique Towers | Python | Medium |
| 3304 | Find the K-th Character in String Game I | Python | Easy |
| 3305 | Count of Substrings Containing Every Vowel and K Consonants I | Python | Medium |
| 3309 | Maximum Possible Number by Binary Concatenation | Python | Medium |
| 3310 | Remove Methods from Project | Python | Medium |
| 3314 | Construct the Minimum Bitwise Array I | Python | Easy |
| 3315 | Construct the Minimum Bitwise Array II | Python | Medium |
| 3318 | Find X Sum of All K Long Subarrays I | Python | Easy |
| 3319 | K-th Largest Perfect Subtree Size in Binary Tree | Python | Medium |
| 3324 | Find the Sequence of Strings Appeared on the Screen | Python | Medium |
| 3325 | Count Substrings with K Frequency Characters I | Python | Medium |
| 3330 | Find the Original Typed String I | Python | Easy |
| 3331 | Find Subtree Sizes After Changes | Python | Medium |
| 3334 | Find the Maximum Factor Score of Array | Python | Medium |
| 3335 | Total Characters in String After Transformations I | Python | Medium |
| 3340 | Check Balanced String | Python | Easy |
| 3341 | Find Minimum Time to Reach Last Room I | Python | Medium |
| 3342 | Find Minimum Time to Reach Last Room II | Python | Medium |
| 3345 | Smallest Divisible Digit Product I | Python | Easy |
| 3349 | Adjacent Increasing Subarrays Detection I | Python | Easy |
| 3350 | Adjacent Increasing Subarrays Detection II | Python | Medium |
| 3354 | Make Array Elements Equal to Zero | Python | Easy |
| 3355 | Zero Array Transformation I | Python | Medium |
| 3360 | Stone Removal Game | Python | Easy |
| 3361 | Shift Distance Between Two Strings | Python | Medium |
| 3364 | Minimum Positive Sum Subarray | Python | Easy |
| 3365 | Rearrange K Substrings to Form Target String | Python | Medium |
| 3370 | Smallest Number with All Set Bits | Python | Easy |
| 3371 | Identify the Largest Outlier in an Array | Python | Medium |
| 3372 | Maximize the Number of Target Nodes After Connecting Trees I | Python | Medium |
| 3379 | Transformed Array | Python | Easy |
| 3380 | Maximum Area Rectangle With Point Constraints I | Python | Medium |
git clone https://github.com/hogan.tech/leetcode-solutions.gitBrowse the folders to find the LeetCode problem you want to solve.
Inside each problem folder, you'll find solutions in various programming languages. Choose the language you prefer.
Each problem folder contains a README file with a problem description, approach, and code explanation. Read this to understand the solution.
Open the code file to view the implementation. Study the code and adapt it as needed for your use case.
You can run the code on your local machine to test and modify it as needed.
If you have a better solution or want to contribute in any way, feel free to submit a pull request.
Welcome feedback and suggestions. If you have any ideas to improve the solutions or find any errors, please let me know.
Happy coding!
By following these steps, users can easily navigate and utilize your LeetCode solutions repository for their coding needs.
