Data Structure
Array
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0001 | Two Sum | 47.6% | Easy | Go | hash table |
| 0004 | Median of Two Sorted Arrays | 36.8% | Hard | Go | binary search |
| 0011 | Container With Most Water | 61.3% | Medium | Go | two pointer |
| 0015 | 3Sum | 25.5% | Medium | Go | two pointer |
| 0016 | 3Sum Closest | 43.0% | Medium | Go | two pointer |
| 0018 | 4Sum | 37.2% | Medium | Go | two pointer |
| 0026 | Remove Duplicates from Sorted Array | 48.6% | Easy | Go | two pointer |
| 0027 | Remove Element | 57.4% | Easy | Go | two pointer |
| 0030 | Substring with Concatenation of All Words | 29.2% | Hard | Go | two pointer |
| 0033 | Search in Rotated Sorted Array | 36.4% | Medium | Go | binary search |
| 0034 | Find First and Last Position of Element in Sorted Array | 39.0% | Medium | Go | binary search |
| 0035 | Search Insert Position | 45.2% | Easy | Go | binary search |
| 0036 | Valid Sudoku | 58.4% | Medium | Go | dfs |
| 0037 | Sudoku Solver | 59.5% | Hard | Go | dfs |
| 0041 | First Missing Positive | 37.6% | Hard | Go | bit map |
| 0042 | Trapping Rain Water | 48.6% | Hard | Go | two pointer |
LinkedList
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0002 | Add Two Numbers | 36.6% | Medium | Go | |
| 0019 | Remove Nth Node From End of List | 37.5% | Medium | Go | two pointer |
| 0021 | Merge Two Sorted Lists | 59.7% | Easy | Go | |
| 0023 | Merge k Sorted Lists | 48.8% | Hard | Go | |
| 0024 | Swap Nodes in Pairs | 64.3% | Medium | Go | |
| 0025 | Reverse Nodes in k-Group | 56.2% | Hard | Go |
Math
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0007 | Reverse Integer | 33.6% | Easy | Go | |
| 0008 | String to Integer (atoi) | 19.1% | Medium | Go | |
| 0009 | Palindrome Number | 57.1% | Easy | Go | |
| 0012 | Integer to Roman | 62.6% | Medium | Go | |
| 0013 | Roman to Integer | 60.7% | Easy | Go | |
| 0029 | Divide Two Integers | 19.3% | Medium | Go | |
| 0031 | Next Permutation | 32.8% | Medium | Go |
Stack
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0020 | Valid Parentheses | 40.9% | Easy | Go | |
| 0032 | Longest Valid Parentheses | 29.7% | Hard | Go |
String
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0003 | Longest Substring Without Repeating Characters | 32.9% | Medium | Go | |
| 0005 | Longest Palindromic Substring | 28.5% | Medium | Go | |
| 0006 | ZigZag Conversion | 46.7% | Medium | Go | |
| 0010 | Regular Expression Matching | 26.0% | Hard | Go | |
| 0014 | Longest Common Prefix | 36.2% | Easy | Go | |
| 0017 | Letter Combinations of a Phone Number | 52.5% | Medium | Go | |
| 0028 | Implement strStr() | 39.5% | Easy | Go | |
| 0038 | Count and Say | 54.4% | Easy | Go | |
| 0043 | Multiply Strings | 41.6% | Medium | Go | |
| 0415 | Add Strings | 49.5% | Easy | Go |
Tree
| # | Title | Acceptance | Difficulty | Solution | Algorithm |
|---|---|---|---|---|---|
| 0022 | Generate Parentheses | 73.3% | Medium | Go | dfs.iterative |
| Go | dfs.recursive | ||||
| 0039 | Combination Sum | 68.4% | Medium | Go | dfs.recursive |
| 0040 | Combination Sum II | 60.1% | Medium | Go | dfs.recursive |
| 0094 | Binary Tree Inorder Traversal | 70.2% | Medium | Go | dfs.morris.break |
| Go | dfs.morris.keep | ||||
| Go | dfs.recursive | ||||
| Go | dfs.stack | ||||
| 0098 | Validate Binary Search Tree | 28.9% | Medium | Go | dfs.recursive |
| 0099 | Recover Binary Search Tree | 54.9% | Hard | Go | dfs.recursive |
| 0100 | Same Tree | 56.5% | Easy | Go | dfs.recursive |
| 0101 | Symmetric Tree | 50.0% | Easy | Go | dfs.recursive |
| 0102 | Binary Tree Level Order Traversal | 60.9% | Medium | Go | dfs.recursive |
| 0103 | Binary Tree Zigzag Level Order Traversal | 53.6% | Medium | Go | dfs.recursive |