View Code of Problem 51

#include<stdio.h>
int main()
{
	int n;
	int sum = 0;
	int i, j;
	scanf("%d", &n);
	int a[10][10] = {0};
	for(i = 0;i<n;i++)
		for (j = 0;j < n;j++)
		{
			scanf("%d", &a[i][j]);
		}
	for(i =0;i<n;i++)
		for (j = 0;j <= i;j++)
		{
			sum = sum + a[i][j];
		}
	printf("%d\n", sum);
	return 0;
}