Mind palace

01-11

958. Check Completeness of a Binary Tree

01-11

1650. Lowest Common Ancestor of a Binary Tree III

01-10

1361. Validate Binary Tree Nodes

01-09

1424. Diagonal Traverse II

01-08

515. Find Largest Value in Each Tree Row

01-06

1644. Lowest Common Ancestor of a Binary Tree II

12-30

863. All Nodes Distance K in Binary Tree

12-29

1026. Maximum Difference Between Node and Ancestor

12-02

236. Lowest Common Ancestor of a Binary Tree

12-01

536. Construct Binary Tree from String