View Code of Problem 51

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

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