View Code of Problem 51

#include<bits/stdc++.h>
using namespace std;

int main()
{
	int number[15][15];
	int n,sum=0;
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		for(int j=1;j<=n;j++)
			scanf("%d",&number[i][j]);
			
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=i;j++)
		{
			sum+=number[i][j];
		}
	}
	printf("%d",sum);
	
}