class Pookan
{
public:
    enum Error
    {
        NoError = 0,
        HeatError,
        ExplosionError
    };
private:
    int mx;
public:
    explicit Pookan(int x) : mx(x) {}
    Error error() const
    {
        if (mx <= 37)
            return NoError;
        else if (mx < 9000)
            return HeatError;
        else
            return ExplosionError;
    }
};