View Code of Problem 51

#include<stdio.h>
#include<math.h>
#include <string.h>
#define Max 81
int main()
{
	int n,i,j,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<n;i++)	
	  for(j=0;j<=i;j++)
	  	sum+=a[i][j];
	  
	printf("%d",sum);

    return 0;
}

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