View Code of Problem 51

#include<stdio.h>

int main(void){
	int n,sum=0,a[10][10];
	scanf("%d",&n);
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			scanf("%d",&a[i][j]);
		}
		for(int x=0;x<=i;x++){
			sum+=a[i][x];
		}
	}
	printf("%d",sum);
}