youssef-kishk/30-Days-LeetCoding-Challenge

My solution for Leet-Code 30 days coding challenge

Java

30-Days-LeetCoding-Challenge

My solutions for April 2020 Leet-Code 30 days coding challenge

Week 1

1. Single Number

Solution

2. Happy Number

Solution

3. Maximum Subarray

Solution

4. Move Zeroes

Solution

5. Best Time to Buy and Sell Stock II

Solution

6. Group Anagrams

Solution

7. Counting Elements

Solution

Week 2

1. Middle of the Linked List

Solution

2. Backspace String Compare

Solution

3. Min Stack

Solution

4. Diameter of Binary Tree

Solution

5. Last Stone Weight

Solution

6. Contiguous Array

Solution

7. Perform String Shifts

Solution

Week 3

1. Product of Array Except Self

Solution

2. Valid Parenthesis String

Solution

3. Number of Islands

Solution

4. Minimum Path Sum

Solution

5. Search in Rotated Sorted Array

Solution

6. Construct Binary Search Tree from Preorder Traversal

Solution

7. Leftmost Column with at Least a One

Solution

Week 4

1. Subarray Sum Equals K

Solution

2. Bitwise AND of Numbers Range

Solution

3. LRU Cache

Solution

4. Jump Game

Solution

5. Longest Common Subsequence

Solution

6. Maximal Square

Solution

7. First Unique Number

Solution

Week 5

1. Binary Tree Maximum Path Sum

Solution

2. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree

Solution