View Code of Problem 51

#include<stdio.h>	
int main()
{
	int a[10][10],i,j;
	int sum=0,n;
	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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