View Code of Problem 51

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

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