| 443 | String Compression | Medium |
| 457 | Circular Array Loop | Medium |
| 475 | Heaters | Medium |
| 481 | Magical String | Medium |
| 522 | Longest Uncommon Subsequence II | Medium |
| 524 | Longest Word in Dictionary through Deleting | Medium |
| 532 | K-diff Pairs in an Array | Medium |
| 541 | Reverse String II | Easy |
| 556 | Next Greater Element III | Medium |
| 567 | Permutation in String | Medium |
| 581 | Shortest Unsorted Continuous Subarray | Medium |
| 611 | Valid Triangle Number | Medium |
| 633 | Sum of Square Numbers | Medium |
| 653 | Two Sum IV - Input is a BST | Easy |
| 658 | Find K Closest Elements | Medium |
| 680 | Valid Palindrome II | Easy |
| 696 | Count Binary Substrings | Easy |
| 719 | Find K-th Smallest Pair Distance | Hard |
| 763 | Partition Labels | Medium |
| 777 | Swap Adjacent in LR String | Medium |
| 795 | Number of Subarrays with Bounded Maximum | Medium |
| 809 | Expressive Words | Medium |
| 821 | Shortest Distance to a Character | Easy |
| 825 | Friends Of Appropriate Ages | Medium |
| 826 | Most Profit Assigning Work | Medium |
| 838 | Push Dominoes | Medium |
| 844 | Backspace String Compare | Easy |
| 845 | Longest Mountain in Array | Medium |
| 881 | Boats to Save People | Medium |
| 905 | Sort Array By Parity | Easy |