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);
        
 
 
 
 
 
 
}

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