| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 983 | Minimum Cost For Tickets | Solution | Medium | Dynamic Programming |
| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 100 | Same Tree | Solution | Easy | Tree | |
| 101 | Minimum Depth of Binary Tree | Solution | Easy | Tree | |
| 104 | Maximum Depth of Binary Tree | Solution | Easy | Tree | |
| 112 | Path Sum | Solution | Easy | Tree | |
| 404 | Sum of Left Leaves | Solution | Easy | Tree,post order | Apple |
| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 949 | Largest Time for Given Digits | Solution | Easy |
| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 984 | String Without AAA or BBB | Solution | Easy | Greedy | |
| 300 | Longest Increasing Subsequence | Solution | Medium | Greedy |
| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 141 | Linked List Cycle | Solution | Easy | Greedy |
| # | Title | Solution | Difficulty | Note | TAG |
|---|---|---|---|---|---|
| 191 | Number of 1 Bits | Solution | Easy | Hamming weight |