2D Matrix Absolute Difference Diagonals Elements Sum

2D Matrix Absolute Difference Diagonals Elements Sum

A Square Matrix has N rows and N columns. Get the matrix as input and find the absolute difference between the sum of the values in the two diagonals.

Input Format:

The first line contains N.
Next N lines containing the elements of the matrix with N column values separated by a space.

Output Format:

Absolute difference between the sum of the values in the two diagonals.

Boundary Conditions:
1 <= N <= 100

Example Input/Output 1:
Input:
2
35 80
90 20

Output:
115

Example Input/Output 2:
Input:
4
1 4 4 2
2 2 1 8
8 1 3 5
10 1 8 3 

Output:
5

Code:

#include <iostream>

#include<stdlib.h>

using namespace std;

int main(int argc, char** argv)

{

 int n,d=0,d1=0;

 cin>>n;

 int arr[n][n],i,j;

 for(i=0;i<n;i++)

    {

        for(j=0;j<n;j++)

            {

                cin>>arr[i][j];

                if(i==j)

                    d+=arr[i][j];

                if(i+j==n-1)

                    d1+=arr[i][j];

            }

    }

    cout<<abs(d1-d);

}
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