| Title | Acceptance | Level |
|---|---|---|
| Moving Average from Data Stream | 70.9% | Easy |
| Decode String | 50.0% | Medium |
| Insert Delete GetRandom O(1) | 47.5% | Medium |
| Number of Islands | 46.8% | Medium |
| Maximal Square | 37.7% | Medium |
| Longest Palindromic Substring | 29.5% | Medium |
| Longest Substring with At Most K Distinct Characters | 44.1% | Hard |
| Binary Tree Maximum Path Sum | 34.3% | Hard |