Reverse Substrings Between Each Pair of Parentheses

Decode String

Serialize and Deserialize BST

K Closest Points to Origin

Maximum Binary Tree

Daily Temperatures

Stone Game

Array Nesting

Bitwise ORs of Subarrays

Odd Even Linked List

Matchsticks to Square

All Nodes Distance K in Binary Tree

Sum Root to Leaf Numbers

Longest Repeating Character Replacement

Minimum Falling Path Sum

Spiral Matrix

Simplify Path

ZigZag Conversion

String-to-Integer(atoi)

Verify-Preorder-Serialization-of-a-Binary-Tree