Day 8 of 30 days Leetcode challenge
Middle of the Linked List Given a non-empty, singly linked list with head node head, return a middl ...
Day 7 of 30 days Leetcode challenge
Counting Element Given an integer array arr, count element x such that x + 1 is also in arr. If th ...
Day 6 of 30 days Leetcode challenge
Group Anagrams Given an array of strings, group anagrams together. Example: Input: ["eat&quo ...
Day 5 of 30 days Leetcode challenge
Best Time to Buy and Sell Stock II Say you have an array for which the ith element is the price of ...
Day 4 of 30 days Leetcode challenge
Move Zeros Given an array nums, write a function to move all 0's to the end of it while maintaining ...
Day 3 of 30 days Leetcode challenge
Maximum Subarray Given an integer array nums, find the contiguous subarray (containing at least one ...
Day 2 of 30 days Leetcode challenge
Happy Number Write an algorithm to determine if a number is "happy". A happy number is a number def ...
Day 1 of 30 days Leetcode challenge
Single Number Given a non-empty array of integers, every element appears twice except for one. Find ...