View Code of Problem 51

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