#include <iostream>
using namespace std;
int main(void){
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
    	int n;
    	cin >> n;
    	bool f;
    	int count = 0;
    	for (int j = 0 ;j < n; j++) {
    		cin >> f;
    		if (f) count++;
    	}
    	cout << count << endl;
    }
}