| 1391 | Check if There is a Valid Path in a Grid | Medium |
| 1443 | Minimum Time to Collect All Apples in a Tree | Medium |
| 1448 | Count Good Nodes in Binary Tree | Medium |
| 1457 | Pseudo-Palindromic Paths in a Binary Tree | Medium |
| 1462 | Course Schedule IV | Medium |
| 1466 | Reorder Routes to Make All Paths Lead to the City Zero | Medium |
| 1483 | Kth Ancestor of a Tree Node | Hard |
| 1519 | Number of Nodes in the Sub-Tree With the Same Label | Medium |
| 1530 | Number of Good Leaf Nodes Pairs | Medium |
| 1559 | Detect Cycles in 2D Grid | Medium |
| 1568 | Minimum Number of Days to Disconnect Island | Hard |
| 1600 | Throne Inheritance | Medium |
| 1631 | Path With Minimum Effort | Medium |
| 1706 | Where Will the Ball Fall | Medium |
| 1722 | Minimize Hamming Distance After Swap Operations | Medium |
| 1766 | Tree of Coprimes | Hard |
| 1905 | Count Sub Islands | Medium |
| 1932 | Merge BSTs to Create Single BST | Hard |
| 1970 | Last Day Where You Can Still Cross | Hard |
| 1971 | Find if Path Exists in Graph | Easy |
| 1992 | Find All Groups of Farmland | Medium |
| 1993 | Operations on Tree | Medium |
| 2003 | Smallest Missing Genetic Value in Each Subtree | Hard |
| 2049 | Count Nodes With the Highest Score | Medium |
| 2092 | Find All People With Secret | Hard |
| 2096 | Step-By-Step Directions From a Binary Tree Node to Another | Medium |
| 2097 | Valid Arrangement of Pairs | Hard |
| 2101 | Detonate the Maximum Bombs | Medium |
| 2127 | Maximum Employees to Be Invited to a Meeting | Hard |
| 2192 | All Ancestors of a Node in a Directed Acyclic Graph | Medium |