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| # | Title | Solution | Difficulty | About | Note |
|---|---|---|---|---|---|
| 1 | Two Sum | JavaScript | Easy | Array | Note |
| 3 | Longest Substring Without Repeating Characters | JavaScript | Medium | Sliding Window | |
| 13 | Roman to Integer | JavaScript | Easy | Linked-list | |
| 21 | Merge Two Sorted Lists | JavaScript | Easy | Linked-list | |
| 121 | Best Time to Buy and Sell Stock | JavaScript | Easy | Array | Note |
| 141 | Linked List Cycle | JavaScript | Easy | Linked-list | |
| 160 | Intersection of Two Linked Lists | JavaScript | Easy | Linked-list | |
| 191 | Number of 1 bits | JavaScript | Easy | Array | Note |
| 205 | Isomorphic Strings | JavaScript | Easy | Array | |
| 206 | Reverse Linked List | JavaScript | Easy | Linked-list | |
| 209 | Minimum Size Subarray Sum | JavaScript | Medium | Sliding Window | |
| 217 | Contains Duplicate | JavaScript | Easy | Array | |
| 242 | Vaild Anagram | JavaScript | Easy | Array | |
| 917 | Reverse Only Letters | JavaScript | Easy | Array | Note |