Leetcode Practice Notes Here are some answers of leetcode questions. Reference Discuss Stackoverflow Blog Questions EASY QUESTIONS Same Tree Delete Node in a Linked List Intersection of Two Arrays Move Zeroes Invert Binary Tree Maximum Depth of Binary Tree Add Digits Nim Game Reverse String Sum of Two Integers Guess Number Higher or Lower Ransom Note Excel Sheet Column Number Valid Anagram Majority Element Contains Duplicate Intersection of Two Arrays II Reverse Linked List Ugly Number Remove Duplicates from Sorted List Lowest Common Ancestor of a Binary Search Tree Climbing Stairs Best Time to Buy and Sell Stock Merge Two Sorted Lists Linked List Cycle Reverse Vowels of a String Swap Nodes in Pairs House Robber Binary Tree Level Order Traversal II Symmetric Tree Remove Element Plus One Balanced Binary Tree Pascal's Triangle Implement Queue using Stacks Remove Duplicates from Sorted Array Factorial Trailing Zeroes Answers EASY QUESTIONS Same Tree Delete Node in a Linked List Intersection of Two Arrays Move Zeroes Invert Binary Tree Maximum Depth of Binary Tree Add Digits Nim Game Reverse String Sum of Two Integers Guess Number Higher or Lower Ransom Note Excel Sheet Column Number Valid Anagram Majority Element Contains Duplicate Intersection of Two Arrays II Reverse Linked List Ugly Number Remove Duplicates from Sorted List Lowest Common Ancestor of a Binary Search Tree Climbing Stairs Best Time to Buy and Sell Stock Merge Two Sorted Lists Linked List Cycle Reverse Vowels of a String Swap Nodes in Pairs House Robber Binary Tree Level Order Traversal II Symmetric Tree Remove Element Plus One Balanced Binary Tree Pascal's Triangle Implement Queue using Stacks Remove Duplicates from Sorted Array Factorial Trailing Zeroes