#include <iostream>
using namespace std;
int main()
{
int t,n,suma,liczba,i;
cin>> t;
for(int z; t>z ;z++)
{
cin>>n;
while( i<=n)
{
cin>> liczba;
suma=suma+liczba;
i++;
}
cout << suma << endl;
if (i>n) {suma=0;i=1;}
}
return 0;
}
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