class Rand {
private:
    std::unique_ptr<std::mt19937> _mt;
    std::random_device _rd;

public:
    Rand() {
        _mt = std::make_unique<std::mt19937>(_rd());
    }

    std::mt19937 & get() { return *_mt.get(); }

    template<typename T>
    T gen(T from, T to) {
        std::uniform_int_distribution<T> d(from, to);
        return d(get());
    }

    template<typename T>
    void enumgen(T & type) {
        std::uniform_int_distribution<i32> d((i32)T::None + 1, (i32)T::Max - 1);
        type = (T)d(get());
    }

    bool prob(float num) {
        std::bernoulli_distribution d(num);
        return d(get());
    }
};