| 979. Distribute Coins in Binary Tree | | | Solve | Medium | | |
| 987. Vertical Order Traversal of a Binary Tree | | | Solve | Hard | | |
| 988. Smallest String Starting From Leaf | | | Solve | Medium | | |
| 993. Cousins in Binary Tree | | | Solve | Easy | | |
| 998. Maximum Binary Tree II | | | Solve | Medium | | |
| 1008. Construct Binary Search Tree from Preorder Traversal | | | Solve | Medium | | |
| 1022. Sum of Root To Leaf Binary Numbers | | | Solve | Easy | | |
| 1026. Maximum Difference Between Node and Ancestor | | | Solve | Medium | | |
| 1028. Recover a Tree From Preorder Traversal | | | Solve | Hard | | |
| 1038. Binary Search Tree to Greater Sum Tree | | | Solve | Medium | | |
| 1080. Insufficient Nodes in Root to Leaf Paths | | | Solve | Medium | | |
| 1104. Path In Zigzag Labelled Binary Tree | | | Solve | Medium | | |
| 1110. Delete Nodes And Return Forest | | | Solve | Medium | | |
| 1120. Maximum Average Subtree | | | Solve | Medium | | |
| 1123. Lowest Common Ancestor of Deepest Leaves | | | Solve | Medium | | |
| 1145. Binary Tree Coloring Game | | | Solve | Medium | | |
| 1161. Maximum Level Sum of a Binary Tree | | | Solve | Medium | | |
| 1214. Two Sum BSTs | | | Solve | Medium | | |
| 1261. Find Elements in a Contaminated Binary Tree | | | Solve | Medium | | |
| 1302. Deepest Leaves Sum | | | Solve | Medium | | |
| 1305. All Elements in Two Binary Search Trees | | | Solve | Medium | | |
| 1315. Sum of Nodes with Even-Valued Grandparent | | | Solve | Medium | | |
| 1325. Delete Leaves With a Given Value | | | Solve | Medium | | |
| 1339. Maximum Product of Splitted Binary Tree | | | Solve | Medium | | |
| 1361. Validate Binary Tree Nodes | | | Solve | Medium | | |
| 1367. Linked List in Binary Tree | | | Solve | Medium | | |
| 1372. Longest ZigZag Path in a Binary Tree | | | Solve | Medium | | |
| 1373. Maximum Sum BST in Binary Tree | | | Solve | Hard | | |
| 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree | | | Solve | Easy | | |
| 1382. Balance a Binary Search Tree | | | Solve | Medium | | |
| 1430. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree | | | Solve | Medium | | |
| 1448. Count Good Nodes in Binary Tree | | | Solve | Medium | | |
| 1457. Pseudo-Palindromic Paths in a Binary Tree | | | Solve | Medium | | |
| 1469. Find All The Lonely Nodes | | | Solve | Easy | | |
| 1485. Clone Binary Tree With Random Pointer | | | Solve | Medium | | |
| 1530. Number of Good Leaf Nodes Pairs | | | Solve | Medium | | |
| 1569. Number of Ways to Reorder Array to Get Same BST | | | Solve | Hard | | |
| 1586. Binary Search Tree Iterator II | | | Solve | Medium | | |
| 1597. Build Binary Expression Tree From Infix Expression | | | Solve | Hard | | |
| 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 | - | |
