1096 A+B for Input-Output Practice (VIII)

#include<iostream>
using namespace std;

int main()
{
int N, a, n;
cin >> n;
while (cin >> N&&n){
int sum = 0;
while (N--){
cin >> a;
sum = sum + a;
}if(n>1)
cout << sum << endl<<endl;
else cout << sum << endl;
n--;
}
return 0;
}