| 1448. Count Good Nodes in Binary Tree | | | Solve | Medium | | |
| 1457. Pseudo-Palindromic Paths in a Binary Tree | | | Solve | Medium | | |
| 1485. Clone Binary Tree With Random Pointer | | | Solve | Medium | | |
| 1490. Clone N-ary Tree | | | Solve | Medium | | |
| 1506. Find Root of N-Ary Tree | | | Solve | Medium | | |
| 1519. Number of Nodes in the Sub-Tree With the Same Label | | | Solve | Medium | | |
| 1522. Diameter of N-Ary Tree | | | Solve | Medium | | |
| 1530. Number of Good Leaf Nodes Pairs | | | Solve | Medium | | |
| 1586. Binary Search Tree Iterator II | | | Solve | Medium | | |
| 1600. Throne Inheritance | | | Solve | Medium | | |
| 1602. Find Nearest Right Node in Binary Tree | | | Solve | Medium | | |
| 1609. Even Odd Tree | | | Solve | Medium | | |
| 1612. Check If Two Expression Trees are Equivalent | | | Solve | Medium | | |
| 1628. Design an Expression Tree With Evaluate Function | | | Solve | Medium | | |
| 1644. Lowest Common Ancestor of a Binary Tree II | | | Solve | Medium | | |
| 1650. Lowest Common Ancestor of a Binary Tree III | | | Solve | Medium | | |
| 1660. Correct a Binary Tree | | | Solve | Medium | | |
| 1666. Change the Root of a Binary Tree | | | Solve | Medium | | |
| 1676. Lowest Common Ancestor of a Binary Tree IV | | | Solve | Medium | | |
| 1740. Find Distance in a Binary Tree | | | Solve | Medium | | |
| 1902. Depth of BST Given Insertion Order | | | Solve | Medium | - | |
| 1973. Count Nodes Equal to Sum of Descendants | | | Solve | Medium | | |
| 1993. Operations on Tree | | | Solve | Medium | | |
| 2049. Count Nodes With the Highest Score | | | Solve | Medium | | |
| 2096. Step-By-Step Directions From a Binary Tree Node to Another | | | Solve | Medium | | |
| 2196. Create Binary Tree From Descriptions | | | Solve | Medium | | |
| 2265. Count Nodes Equal to Average of Subtree | | | Solve | Medium | | |
| 2368. Reachable Nodes With Restrictions | | | Solve | Medium | | |
| 2378. Choose Edges to Maximize Score in a Tree | | | Solve | Medium | | |
| 2385. Amount of Time for Binary Tree to Be Infected | | | Solve | Medium | | |
| 2415. Reverse Odd Levels of Binary Tree | | | Solve | Medium | | |
| 2445. Number of Nodes With Value One | | | Solve | Medium | | |
| 2467. Most Profitable Path in a Tree | | | Solve | Medium | | |
| 2471. Minimum Number of Operations to Sort a Binary Tree by Level | | | Solve | Medium | | |
| 2476. Closest Nodes Queries in a Binary Search Tree | | | Solve | Medium | | |
| 2477. Minimum Fuel Cost to Report to the Capital | | | Solve | Medium | | |
| 2583. Kth Largest Sum in a Binary Tree | | | Solve | Medium | | |
| 2641. Cousins in Binary Tree II | | | Solve | Medium | | |
| 2673. Make Costs of Paths Equal in a Binary Tree | | | Solve | Medium | | |
| 2764. Is Array a Preorder of Some Binary Tree | | | Solve | Medium | - | |
| 2773. Height of Special Binary Tree | | | Solve | Medium | - | |
| 2925. Maximum Score After Applying Operations on a Tree | | | Solve | Medium | | |
| 3004. Maximum Subtree of the Same Color | | | Solve | Medium | - | |
| 3067. Count Pairs of Connectable Servers in a Weighted Tree Network | | | Solve | Medium | - | |
| 3157. Find the Level of Tree with Minimum Sum | | | Solve | Medium | - | |
| 3249. Count the Number of Good Nodes | | | Solve | Medium | - | |
| 3319. K-th Largest Perfect Subtree Size in Binary Tree | | | Solve | Medium | - | |
| 3331. Find Subtree Sizes After Changes | | | Solve | Medium | - | |
