arjun1237/diagonaldifference

DiagonalDifference

Problem is from link: https://www.hackerrank.com/challenges/diagonal-difference/problem

Given a square matrix, calculate the absolute difference between the sums of its diagonals.

For example, the square matrix is shown below:

1 2 3 4 5 6 9 8 9
The left-to-right diagonal = . The right to left diagonal = . Their absolute difference is .

Function description

Complete the function in the editor below. It must return an integer representing the absolute diagonal difference.

diagonalDifference takes the following parameter:

arr: an array of integers . Input Format

The first line contains a single integer, , the number of rows and columns in the matrix . Each of the next lines describes a row, , and consists of space-separated integers .

Constraints

Output Format

Print the absolute difference between the sums of the matrix's two diagonals as a single integer.

Sample Input

3 11 2 4 4 5 6 10 8 -12 Sample Output

15 Explanation

The primary diagonal is:

11 5 -12 Sum across the primary diagonal: 11 + 5 - 12 = 4

The secondary diagonal is:

 4

5 10 Sum across the secondary diagonal: 4 + 5 + 10 = 19 Difference: |4 - 19| = 15

Note: |x| is the absolute value of x