UVa 11204 - Musical instruments

// UVa 11204 - Musical instruments

#include <iostream>
#include <string.h>
using namespace std;

int main() {
	int cases;
	for (cin >> cases; cases; cases--) {
		int n, m;
		cin >> n >> m;
		int pref[32];
		memset(pref, 0, sizeof(pref));
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < n; j++) {
				int a;
				cin >> a;
				if (a == 1) {
					pref[j]++;
				}
			}
		}
		unsigned long long sol = 1;
		for (int j = 0; j < n; j++) {
			if (pref[j] > 1)
				sol *= pref[j];
		}
		cout << sol << endl;
	}

	return 0;
}