Solution to LeetCode Problem Set

Here is my collection of solutions to leetcode problems.

Related code can be found in this repo: https://github.com/zhuli19901106/leetcode

LeetCode - Course Schedule

LeetCode - Reverse Linked List

LeetCode - Isomorphic Strings

LeetCode - Count Primes

LeetCode - Remove Linked List Elements

LeetCode - Happy Number

LeetCode - Bitwise AND of Numbers Range

LeetCode - Number of Islands

LeetCode - Binary Tree Right Side View

LeetCode - House Robber

LeetCode - Number of 1 Bits

LeetCode - Reverse Bits

LeetCode - Rotate Array

LeetCode - Best Time to Buy and Sell Stock IV

LeetCode - Repeated DNA Sequences

LeetCode - Largest Number

LeetCode - Dungeon Game

LeetCode - Binary Search Tree Iterator

LeetCode - Factorial Trailing Zeroes

LeetCode - Excel Sheet Column Number

LeetCode - Majority Element

LeetCode - Excel Sheet Column Title

LeetCode - Fraction to Recurring Decimal

LeetCode - Compare Version Numbers

LeetCode - Maximum Gap

LeetCode - Find Peak Element

LeetCode - Intersection of Two Linked Lists

LeetCode - Min Stack

LeetCode - Find Minimum in Rotated Sorted Array II

LeetCode - Find Minimum in Rotated Sorted Array

LeetCode - Reverse Words in a String

LeetCode - Regular Expression Matching

LeetCode - Sudoku Solver

LeetCode - Implement strStr()

LeetCode - Wildcard Matching

LeetCode - Word Ladder II

LeetCode - Word Ladder

LeetCode - Word Break II

LeetCode - Word Break

LeetCode - Valid Number

LeetCode - Surrounded Regions

LeetCode - Substring with Concatenation of All Words

LeetCode - Scramble String

LeetCode - Word Search

LeetCode - Reverse Nodes in k-Group

LeetCode - Palindrome Partitioning II

LeetCode - Palindrome Partitioning

LeetCode - Merge Interval

LeetCode - Minimum Window Substring

LeetCode - Maximal Rectangle

LeetCode - Max Points on a Line

LeetCode - Largest Rectangle in Histogram

LeetCode - Jump Game II

LeetCode - Jump Game

LeetCode - Interleaving String

LeetCode - Gas Station

LeetCode - Evaluate Reverse Polish Notation

LeetCode - Edit Distance

LeetCode - Clone Graph

LeetCode - Candy

LeetCode - 3Sum Closest

LeetCode - Set Matrix Zeroes

LeetCode - Search for a Range

LeetCode - N-Queens II

LeetCode - N-Queens

LeetCode - LRU Cache

LeetCode - Longest Valid Parentheses

LeetCode - Insert Interval

LeetCode - Flatten Binary Tree to Linked List

LeetCode - Convert Sorted List to Binary Search Tree

LeetCode - Binary Tree Maximum Path Sum

LeetCode - Trapping Rain Water

LeetCode - Unique Binary Search Trees II

LeetCode - Text Justification

LeetCode - String to Integer (atoi)

LeetCode - Longest Palindromic Substring

LeetCode - Permutation Sequence

LeetCode - First Missing Positive

LeetCode - Distinct Subsequences

LeetCode - Container With Most Water

LeetCode - 4Sum

LeetCode - Sort List

LeetCode - Insertion Sort List

LeetCode - Binary Tree Postorder Traversal

LeetCode - Binary Tree Preorder Traversal

LeetCode - Reorder List

LeetCode - Linked List Cycle II

LeetCode - Linked List Cycle

LeetCode - Copy List with Random Pointer

LeetCode - Single Number II

LeetCode - Single Number

LeetCode - Sum Root to Leaf Numbers

LeetCode - Longest Consecutive Sequence

LeetCode - Valid Palindrome

LeetCode - Best Time to Buy and Sell Stock III

LeetCode - Best Time to Buy and Sell Stock II

LeetCode - Best Time to Buy and Sell Stock

LeetCode - Triangle

LeetCode - Pascal's Triangle II

LeetCode - Pascal's Triangle

LeetCode - Populating Next Right Pointers in Each Node II

LeetCode - Populating Next Right Pointers in Each Node

LeetCode - Path Sum II

LeetCode - Path Sum

LeetCode - Minimum Depth of Binary Tree

LeetCode - Balanced Binary Tree

LeetCode - Convert Sorted Array to Binary Search Tree

LeetCode - Binary Tree Level Order Traversal II

LeetCode - Construct Binary Tree from Inorder and Postorder Traversal

LeetCode - Construct Binary Tree from Preorder and Inorder Traversal

LeetCode - Maximum Depth of Binary Tree

LeetCode - Binary Tree Zigzag Level Order Traversal

LeetCode - Binary Tree Level Order Traversal

LeetCode - Symmetric Tree

LeetCode - Same Tree

LeetCode - Recover Binary Search Tree

LeetCode - Validate Binary Search Tree

LeetCode - Unique Binary Search Trees

LeetCode - Binary Tree Inorder Traversal

LeetCode - Restore IP Addresses

LeetCode - Reverse Linked List II

LeetCode - Subsets II

LeetCode - Decode Ways

LeetCode - Gray Code

LeetCode - Merge Sorted Array

LeetCode - Partition List

LeetCode - Remove Duplicates from Sorted List II

LeetCode - Remove Duplicates from Sorted List

LeetCode - Search in Rotated Sorted Array II

LeetCode - Remove Duplicates from Sorted Array II

LeetCode - Subsets

LeetCode - Combinations

LeetCode - Sort Colors

LeetCode - Search a 2D Matrix

LeetCode - Simplify Path

LeetCode - Climbing Stairs

LeetCode - Sqrt(x)

LeetCode - Plus One

LeetCode - Add Binary

LeetCode - Merge Two Sorted Lists

LeetCode - Minimum Path Sum

LeetCode - Unique Paths II

LeetCode - Unique Paths

LeetCode - Rotate List

LeetCode - Spiral Matrix II

LeetCode - Length of Last Word

LeetCode - Spiral Matrix

LeetCode - Maximum Subarray

LeetCode - Pow(x, n)

LeetCode - Anagrams

LeetCode - Rotate Image

LeetCode - Permutations II

LeetCode - Permutations

LeetCode - Multiply Strings

LeetCode - Combination Sum II

LeetCode - Combination Sum

LeetCode - Count and Say

LeetCode - Valid Sudoku

LeetCode - Search Insert Position

LeetCode - Search in Rotated Sorted Array

LeetCode - Next Permutation

LeetCode - Divide Two Integers

LeetCode - Remove Element

LeetCode - Remove Duplicates from Sorted Array

LeetCode - Swap Nodes in Pairs

LeetCode - Merge k Sorted Lists

LeetCode - Generate Parentheses

LeetCode - Valid Parentheses

LeetCode - Remove Nth Node From End of List

LeetCode - Letter Combinations of a Phone Number

LeetCode - 3Sum

LeetCode - Longest Common Prefix

LeetCode - Roman to Integer

LeetCode - Integer to Roman

LeetCode - Palindrome Number

LeetCode - Reverse Integer

LeetCode - ZigZag Conversion

LeetCode - Add Two Numbers

LeetCode - Longest Substring Without Repeating Characters

LeetCode - Median of Two Sorted Arrays

LeetCode - Two Sum