Mind palace

11-26

278. First Bad Version

11-26

297. Serialize and Deserialize Binary Tree

11-23

721. Accounts Merge

11-22

523. Continuous Subarray Sum

11-22

125. Valid Palindrome

11-22

215. Kth Largest Element in an Array

11-22

301. Remove Invalid Parentheses

11-22

211. Design Add and Search Words Data Structure

11-22

1570. Dot Product of Two Sparse Vectors

11-22

269. Alien Dictionary