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

C code:

#include<stdio.h>

#include <stdlib.h>

int main()

{

int n,i,j,s1=0,s2=0,t;

scanf("%d",&n);

for(i=0;i<n;i++)

for(j=0;j<n;j++)

{

    scanf("%d",&t);

    if(i==j)

    s1+=t;

    if(j==n-1-i)

    s2+=t;

}

printf("%d",abs(s2-s1));

}