int main()
{
    std::cout << "*** std::unordered_set 예제 ***" << std::endl;
    std::unordered_set<int> set1 = {1, 2, 3, 4, 5};

    std::cout << "set1 초깃값: "; print(set1);

    set1.insert(2);
    std::cout << "2 삽입: "; print(set1);

    set1.insert(10);
    set1.insert(300);
    std::cout << "10, 300 삽입: "; print(set1);

    find(set1, 4);
    find(set1, 100);

    set1.erase(2);
    std::cout << "2 삭제: "; print(set1);

    find(set1, 2);

    std::cout << "*** std::unordered_map 예제 ***" << std::endl;
    std::unordered_map<int, int> squareMap;

    squareMap.insert({2, 4});
    squareMap[3] = 9;
    std::cout << "2, 3의 제곱 삽입: "; print(squareMap);

    squareMap[20] = 400;
    squareMap[30] = 900;
    std::cout << "20, 30의 제곱 삽입: "; print(squareMap);

    find(squareMap, 10);
    find(squareMap, 20);
    std::cout << "squareMap[3] = " << squareMap[3] << std::endl;
    std::cout << "squareMap[100] = " << squareMap[100] << std::endl;
    print(squareMap);
}