http://zerojudge.tw/ShowProblem?problemid=b035
#include<iostream>
using namespace std;
int main() {
int n,a,sum;
while (cin >> n){
if (n ==0 ) break;
sum=0;
for(int i=0;i<n;i++){
cin >> a;
sum=sum+ * ;
}
cout << sum <<endl;