Same Tree

Minimum Depth of Binary Tree

Diameter of Binary Tree

Average of Levels in Binary Tree

Path Sum

Merge Two Binary Trees

Maximum Depth of Binary Tree

Lowest Common Ancestor of a Binary Search Tree

Invert Binary Tree

Subtree of Another Tree

Convert Sorted Array to Binary Search Tree

Squares of a Sorted Array

Majority Element

Backspace String Compare

Index Pairs of a String

Non-decreasing Array

Student Attendance Record I

Balanced Binary Tree

Maximum Units on a Truck

Count Binary Substrings

Find the Town Judge

Find the Highest Altitude

Convert 1D Array Into 2D Array

Remove Duplicates from Sorted Array

Pascal's Triangle

Rearrange Spaces Between Words