View Code of Problem 51

#include <stdio.h>
#include <stdlib.h>
#include<ctype.h>
#include<string.h>
#include<math.h>
int main()
{
	int n,i,j,sum;
	sum = 0;
	scanf("%d", &n);
	int arr[n][n];
	for(i=0;i<n;i++)
		for (j = 0; j < n; j++)
		{
			scanf("%d", &arr[i][j]);
		}
	for (j = 0; j < n; j++)
		for (i = 0; i <= j; i++)
			sum += arr[i][j];
	printf("%d", sum);
	return 0;
}