#include <iostream>
using namespace std;

int main() {
    int T;
    cin >> T;
    for (int i = 0; i < T; i++) {
        int N;
        cin >> N;
        int count = 0;
        for (int j = 0; j < N; j++) {
            int f;
            cin >> f;
            if (f == 1) {
                count++;
            }
        }
        cout << count << endl;
    }
    return 0;
}