View Code of Problem 51

#include<stdio.h>
void main(){
int n,i,j,sum;
int a[10][10];
scanf("%d",&n);
for(i=0;i<n;i++)
 for(j=0;j<n;j++)
	 scanf("%d",&a[i][j]);
sum=0;
for(i=0;i<n;i++)
 for(j=0;j<=i;j++)
  sum=sum+a[i][j];
printf("%d\n",sum);




}

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