youssef-kishk / 30-Days-LeetCoding-Challenge

My solution for Leet-Code 30 days coding challenge

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