Leetcode: Solving Leetcode Problems in Hindi

Given a gif, each cell can have one of the three values. 0 for empty, 1 for fresh Orange and 2 for rotten. Return minimum number of minutes that must elapse until no cell has a fresh Orange

Given a grid, find number of islands. We use depth first search.

Traverse a tree or a graph using DFS and BFS

Given a an array of Sorted K linked lists, merge all K lists in one Sorted linked-list and return it.

Find two numbers that add up to a Target. Find two numbers in a sorted array that add up to a number. Find three numbers in an array that add up to a Target.