Mind palace

01-18

285. Inorder Successor in BST

01-18

113. Path Sum II

01-17

538. Convert BST to Greater Tree

01-17

1038. Binary Search Tree to Greater Sum Tree

01-17

545. Boundary of Binary Tree

01-16

98. Validate Binary Search Tree

01-16

102. Binary Tree Level Order Traversal

01-16

449. Serialize and Deserialize BST

01-13

742. Closest Leaf in a Binary Tree

01-12

332. Reconstruct Itinerary