#include <map>
#include <iostream>

using namespace std;

int main() {
    map<int, int> m;
    if (m[0])
        cout << "tem zero\n";
    else
        cout << "nao tem zero\n";
    if (m[0])
        cout << "tem zero\n";
    else
        cout << "nao tem zero\n";
    m[0];
     if (m[0])
        cout << "tem zero\n";
    else
        cout << "nao tem zero\n";

    return 0;
}