View Code of Problem 51

#include<stdio.h>
#define N 10
int main()
{
	int i,n,j;
	int a[n+1][n+1];
	int sum=0;
	scanf("%d", &n); 
	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 += a[i][j];
		}
	}
	printf("%d", sum);
	return 0;
}

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