├── .github ├── FUNDING.yml └── ISSUE_TEMPLATE │ └── feature_request.md ├── .gitignore ├── EASY ├── 0001 - Two Sum.swift ├── 0007 - Reverse Integer.swift ├── 0009 - Palindrome Number.swift ├── 0013 - Roman to Integer.swift ├── 0014 - Longest Common Prefix.swift ├── 0020 - Valid Parentheses.swift ├── 0021 - Merge Two Sorted Lists.swift ├── 0026 - Remove Duplicates from Sorted Array.swift ├── 0027 - Remove Element.swift ├── 0028 - Implement strStr().swift ├── 0035 - Search Insert Position.swift ├── 0038 - Count and Say.swift ├── 0053 - Maximum Subarray.swift ├── 0058 - Length of Last Word.swift ├── 0066 - Plus One.swift ├── 0067 - Add Binary.swift ├── 0069 - Sqrt(x).swift ├── 0070 - Climbing Stairs copy.swift ├── 0083 - Remove Duplicates from Sorted List.swift ├── 0088 - Merge Sorted Array.swift ├── 0100 - Same Tree.swift ├── 0101 - Symmetric Tree.swift ├── 0104 - Maximum Depth of Binary Tree.swift ├── 0108 - Convert Sorted Array to Binary Search Tree.swift ├── 0112 - Path Sum.swift ├── 0118 - Pascal's Triangle.swift ├── 0119 - Pascal's Triangle II.swift ├── 0121 - Best Time to Buy and Sell Stock.swift ├── 0122 - Best Time to Buy and Sell Stock II.swift ├── 0125 - Valid Palindrome.swift ├── 0136 - Single Number.swift ├── 0155 - Min Stack.swift ├── 0167 - Two Sum II - Input array is sorted.swift ├── 0169 - Majority Element.swift ├── 0189 - Rotate Array.swift ├── 0198 - House Robber.swift ├── 0202 - Happy Number.swift ├── 0203 - Remove Linked List Elements.swift ├── 0204 - Count Primes.swift ├── 0206 - Reverse Linked List.swift ├── 0225- Implement Stack using Queues.swift ├── 0232- Implement Queue using Stacks.swift ├── 0234- Palindrome Linked List.swift ├── 0242 - Valid Anagram.swift ├── 0257 - Binary Tree Paths.swift ├── 0258 - Add Digits.swift ├── 0263 - Ugly Number.swift ├── 0268 - Missing Number.swift ├── 0278 - First Bad Version.swift ├── 0283 - Move Zeroes.swift ├── 0290 - Word Pattern.swift ├── 0326 - Power of Three.swift ├── 0344 - Reverse String.swift ├── 0345 - Reverse Vowels of a String.swift ├── 0349 - Intersection of Two Arrays.swift ├── 0350 - Intersection of Two Arrays II.swift ├── 0371 - Sum of Two Integers.swift ├── 0383 - Ransom Note.swift ├── 0387 - First Unique Character in a String.swift ├── 0401 - Binary Watch.swift ├── 0412 - Fizz Buzz.swift ├── 0414 - Third Maximum Number.swift ├── 0443 - String Compression.swift ├── 0448 - Find All Numbers Disappeared in an Array.swift ├── 0461 - Hamming Distance.swift ├── 0463 - Island Perimeter.swift ├── 0496 - Next Greater Element I.swift ├── 0509 - Fibonacci Number.swift ├── 0530 - Minimum Absolute Difference in BST.swift ├── 0543 - Diameter of Binary Tree.swift ├── 0557 - Reverse Words in a String III.swift ├── 0561 - Array Partition I.swift ├── 0605 - Can Place Flowers.swift ├── 0653 - Two Sum IV - Input is a BST.swift ├── 0661 - Image Smoother.swift ├── 0665 - Non-decreasing Array.swift ├── 0674 - Longest Continuous Increasing Subsequence.swift ├── 0682 - Baseball Game.swift ├── 0687 - Longest Univalue Path.swift ├── 0700 - Search in a Binary Search Tree.swift ├── 0704 - Binary Search.swift ├── 0706 - Design HashMap.swift ├── 0709 - To Lower Case.swift ├── 0724 - Find Pivot Index.swift ├── 0728 - Self Dividing Numbers.swift ├── 0733 - Flood Fill.swift ├── 0771 - Jewels and Stones.swift ├── 0796 - Rotate String.swift ├── 0804 - Unique Morse Code Words.swift ├── 0811 - Subdomain Visit Count.swift ├── 0832 - Flipping an Image.swift ├── 0852 - Peak Index in a Mountain Array.swift ├── 0857 - Buddy Strings.swift ├── 0867 - Transpose Matrix.swift ├── 0905 - Sort Array By Parity.swift ├── 0922 - Sort Array By Parity II.swift ├── 0933 - Number of Recent Calls.swift ├── 0938 - Range Sum of BST.swift ├── 0941 - Valid Mountain Array.swift ├── 0942 - DI String Match.swift ├── 0961 - N-Repeated Element in Size 2N Array.swift ├── 0977 - Squares of a Sorted Array.swift ├── 0997 - Find the Town Judge.swift ├── 1021 - Remove Outermost Parentheses.swift ├── 1046 - Last Stone Weight.swift ├── 1047 - Remove All Adjacent Duplicates In String.swift ├── 1051 - Height Checker.swift ├── 1108 - Defanging an IP Address.swift ├── 1122 - Relative Sort Array.swift ├── 1200 - Minimum Absolute Difference.swift ├── 1207 - Unique Number of Occurrences.swift ├── 1252 - Cells with Odd Values in a Matrix.swift ├── 1260 - Shift 2D Grid.swift ├── 1290 - Convert Binary Number in a Linked List to Integer.swift ├── 1295 - Find Numbers with Even Number of Digits.swift ├── 1299 - Replace Elements with Greatest Element on Right Side.swift ├── 1304 - Find N Unique Integers Sum up to Zero.swift ├── 1342 - Number of Steps to Reduce a Number to Zero.swift ├── 1351 - Count Negative Numbers in a Sorted Matrix.swift ├── 1370 - Increasing Decreasing String.swift ├── 1512 - Number of Good Pairs.swift ├── 1528 - Shuffle String.swift ├── 1603 - Design Parking System.swift ├── 1672 - Richest Customer Wealth.swift └── README.md ├── HARD ├── 0010 - Regular Expression Matching.swift ├── 0042 - Trapping Rain Water.swift ├── 0076 - Minimum Window Substring.swift ├── 0329 - Longest Increasing Path in a Matrix.swift ├── 0410 - Split Array Largest Sum.swift └── README.md ├── LICENSE ├── LeetCode-in-Swift.jpg ├── MEDIUM ├── 0002 - Add Two Numbers.swift ├── 0003 - Longest Substring Without Repeating Characters.swift ├── 0005 - Longest Palindromic Substring.swift ├── 0008 - String to Integer (atoi).swift ├── 0011 - Container With Most Water.swift ├── 0012 - Integer to Roman.swift ├── 0015 - 3Sum.swift ├── 0016 - 3Sum Closest.swift ├── 0017 - Letter Combinations of a Phone Number.swift ├── 0018 - 4Sum.swift ├── 0019 - Remove Nth Node From End of List.swift ├── 0022 - Generate Parentheses.swift ├── 0024- Swap Nodes in Pairs.swift ├── 0029- Divide Two Integers.swift ├── 0031- Next Permutation.swift ├── 0033- Search in Rotated Sorted Array.swift ├── 0034 - Find First and Last Position of Element in Sorted Array.swift ├── 0036 - Valid Sudoku.swift ├── 0039 - Combination Sum.swift ├── 0040 - Combination Sum II.swift ├── 0043 - Multiply Strings.swift ├── 0046 - Permutations.swift ├── 0048 - Rotate Image.swift ├── 0049 - Group Anagrams.swift ├── 0050 - Pow(x, n).swift ├── 0054 - Spiral Matrix.swift ├── 0055 - Jump Game.swift ├── 0056 - Merge Intervals.swift ├── 0059 - Spiral Matrix II.swift ├── 0062- Unique Paths.swift ├── 0063- Unique Paths II.swift ├── 0064 - Minimum Path Sum.swift ├── 0073 - Set Matrix Zeroes.swift ├── 0074 - Search a 2D Matrix.swift ├── 0075 - Sort Colors.swift ├── 0077 - Combinations.swift ├── 0078 - Subsets.swift ├── 0079 - Word Search.swift ├── 0081 - Search in Rotated Sorted Array II.swift ├── 0091 - Decode Ways.swift ├── 0092 - Reverse Linked List II.swift ├── 0098 - Validate Binary Search Tree.swift ├── 0102 - Binary Tree Level Order Traversal.swift ├── 0105 - Construct Binary Tree from Preorder and Inorder Traversal.swift ├── 0113 - Path Sum II.swift ├── 0120 - Triangle.swift ├── 0130 - Surrounded Regions.swift ├── 0139 - Word Break.swift ├── 0146 - LRU Cache.swift ├── 0151 - Reverse Words in a String.swift ├── 0153 - Find Minimum in Rotated Sorted Array.swift ├── 0162 - Find Peak Element.swift ├── 0165 - Compare Version Numbers.swift ├── 0173 - Binary Search Tree Iterator.swift ├── 0179 - Largest Number.swift ├── 0187 - Repeated DNA Sequences.swift ├── 0199 - Binary Tree Right Side View.swift ├── 0200 - Number of Islands.swift ├── 0207 - Course Schedule.swift ├── 0208 - Implement Trie (Prefix Tree).swift ├── 0209 - Minimum Size Subarray Sum.swift ├── 0210 - Course Schedule II.swift ├── 0221 - Maximal Square.swift ├── 0223 - Rectangle Area.swift ├── 0227 - Basic Calculator II.swift ├── 0229 - Majority Element II.swift ├── 0238 - Product of Array Except Self.swift ├── 0240 - Search a 2D Matrix II.swift ├── 0279 - Perfect Squares.swift ├── 0287 - Find the Duplicate Number.swift ├── 0300 - Longest Increasing Subsequence.swift ├── 0309 - Best Time to Buy and Sell Stock with Cooldown.swift ├── 0322 - Coin Change.swift ├── 0328 - Odd Even Linked List.swift ├── 0337 - House Robber III.swift ├── 0338 - Counting Bits.swift ├── 0341 - Flatten Nested List Iterator.swift ├── 0343 - Integer Break.swift ├── 0347 - Top K Frequent Elements.swift ├── 0378 - Kth Smallest Element in a Sorted Matrix.swift ├── 0382 - Linked List Random Node.swift ├── 0384 - Shuffle an Array.swift ├── 0394 - Decode String.swift ├── 0419 - Battleships in a Board.swift ├── 0435 - Non-overlapping Intervals.swift ├── 0450 - Delete Node in a BST.swift ├── 0454 - 4Sum II.swift ├── 0486 -Predict the Winner.swift ├── 0515 - Find Largest Value in Each Tree Row.swift ├── 0528 - Random Pick with Weight.swift ├── 0540 - Single Element in a Sorted Array.swift ├── 0560 - Subarray Sum Equals K.swift ├── 0609 - Find Duplicate File in System.swift ├── 0646 - Maximum Length of Pair Chain.swift ├── 0692 - Top K Frequent Words.swift ├── 0701 - Insert into a Binary Search Tree.swift ├── 0729 - My Calendar I.swift ├── 0739 - Daily Temperatures.swift ├── 0890 - Find and Replace Pattern.swift ├── 0921 - Minimum Add to Make Parentheses Valid.swift ├── 0986 - Interval List Intersections.swift ├── 1004 - Max Consecutive Ones III.swift ├── 1011 - 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