View Code of Problem 51

#include<stdio.h>
#include<string.h>
#include<math.h>
#define MAX 1000000+10
#define Max(a,b) a>b?a:b
#define Min(a,b) a<b?a:b
int main()
{
	int n;
	scanf("%d",&n);
	int a[n][n];
	int i,j;
	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<=i;j++)
		{
			sum+=a[i][j];
		}
	}
	printf("%d\n",sum);
}