View Code of Problem 51

#include <stdio.h>
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);
            
          
 
 
 
 
}

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