#include <iostream>
using namespace std;

int main(){
    int t, n, m, a;
    cin >> t;
    for (int tt = 0; tt < t; tt++) {
        long long sum = 0;
        cin >> n >> m;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                cin >> a;
                sum += a;
            }
        }
        cout << sum << endl;
    }
}