View Code of Problem 51

#include<stdio.h>
void main(){
	
	int n,i,j,sum;
	int a[10][10];
	sum=0;
scanf("%d",&n);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
scanf("%d",&a[i][j]);

for(i=1;i<=n;i++)
for(j=1;j<=i;j++)
sum=sum+a[i][j];

printf("%d",sum); 

}

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