| ID | Title | Difficulty |
|---|---|---|
| 2583 | Kth Largest Sum in a Binary Tree | Medium |
| 2603 | Collect Coins in a Tree | Hard |
| 2641 | Cousins in Binary Tree II | Medium |
| 2646 | Minimize the Total Price of the Trips | Hard |
| 2673 | Make Costs of Paths Equal in a Binary Tree | Medium |
| 2791 | Count Paths That Can Form a Palindrome in a Tree | Hard |