View Code of Problem 51

#include<stdio.h>
void main()
{
	int i,j,n,sum=0;
	int 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<5;i++)
	{
		for(j=0;j<i+1;j++)
		{
			sum=sum+a[i][j];
		}
	}
	printf("%d",sum);
}

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