#include<iostream>
using namespace std;
int main(){
    int a;
    cin>>a;
    while(a){
        int b;
        while(cin>>b){
            if(b==0){
                break;
            }
            else{
                int sum = 0;
                int m;
                for(int i = 0;i<b;i++){
                    cin>>m;
                    sum+=m;
                }
                cout<<sum<<endl;
            }
        }
        a--;
    }
}