View Code of Problem 51

#include<stdio.h>
int main()
{
	int n,i,j,a[10][10],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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