You have a 2D grid of ‘N’ rows and ‘M’ columns which are initially filled with water. You are given ‘Q’ queries each consisting of two integers ‘X’ and ‘Y’ and in each query operation, you have to turn the water at position (‘X’, ‘Y’) into a land. You are supposed to find the number of islands in the grid after each query.
An island is a group of lands surrounded by water horizontally, verti...

You are given an array of integers of size ‘N’. You have to make the elements of the array equal, and the cost of changing the element ‘x’ to ‘y’ is abs(x -y). Your task is to find the minimum cost to make the elements of the array equal.
For Example:
Consider ARR = [3, 4, 5] now suppose if we want to change every element value to 4, then the cost of changing 3 to 4 is |3 - 4| which is 1,...