| 1143 | Longest Common Subsequence | Medium |
| 1155 | Number of Dice Rolls With Target Sum | Medium |
| 1239 | Maximum Length of a Concatenated String with Unique Characters | Medium |
| 1282 | Group the People Given the Group Size They Belong To | Medium |
| 1291 | Sequential Digits | Medium |
| 1318 | Minimum Flips to Make a OR b Equal to c | Medium |
| 1347 | Minimum Number of Steps to Make Two Strings Anagram | Medium |
| 1361 | Validate Binary Tree Nodes | Medium |
| 1424 | Diagonal Traverse II | Medium |
| 1441 | Build an Array With Stack Operations | Medium |
| 1443 | Minimum Time to Collect All Apples in a Tree | Medium |
| 1456 | Maximum Number of Vowels in a Substring of Given Length | Medium |
| 1457 | Pseudo-Palindromic Paths in a Binary Tree | Medium |
| 1481 | Least Number of Unique Integers after K Removals | Medium |
| 1493 | Longest Subarray of 1's After Deleting One Element | Medium |
| 1498 | Number of Subsequences That Satisfy the Given Sum Condition | Medium |
| 1503 | Last Moment Before All Ants Fall Out of a Plank | Medium |
| 1535 | Find the Winner of an Array Game | Medium |
| 1557 | Minimum Number of Vertices to Reach All Nodes | Medium |
| 1561 | Maximum Number of Coins You Can Get | Medium |
| 1578 | Minimum Time to Make Rope Colorful | Medium |
| 1583 | Count Unhappy Friends | Medium |
| 1584 | Min Cost to Connect All Points | Medium |
| 1609 | Even Odd Tree | Medium |
| 1615 | Maximal Network Rank | Medium |
| 1630 | Arithmetic Subarrays | Medium |
| 1637 | Widest Vertical Area Between Two Points Containing No Points | Medium |
| 1642 | Furthest Building You Can Reach | Medium |
| 1647 | Minimum Deletions to Make Character Frequencies Unique | Medium |
| 1653 | Minimum Deletions to Make String Balanced | Medium |