| ID | Title | Difficulty |
|---|---|---|
| 1 | Two Sum | Easy |
| 14 | longest Common Prefix | Easy |
| 15 | 3Sum | Medium |
| 21 | Merge Two Sorted Lists | Easy |
| 26 | Remove Duplicate from Sorted Array | Easy |
| 35 | Search Insert Position | Easy |
| 53 | Maximum Subarray | Easy |
| 70 | Climbing Stairs | Easy |
| 83 | Remove Duplicates from Sorted List | Easy |
| 100 | Same Tree | Easy |
| 101 | Symmetric Tree | Easy |
| 136 | Single Number | Easy |
| 412 | Fizz Buzz | Easy |
| 169 | Majority Element | Easy |
| 290 | Word Pattern | Easy |