int main() { HashSet<int> s; cout << s[1].getKeyCount() << endl; s.insert(1); cout << s[1].getKeyCount() << endl; s.insert(1); cout << s[1].getKeyCount() << endl; cout << s[1].getKeyCount() << endl; s.insert(2); s.insert(3); cout << s[1].getKey() << endl; cout << s[1].getKeyCount() << endl; cout << s.check(3) << endl; }