class Rational {
private:
    int numerator;
    int denominator;
public:
    Rational() : numerator(0), denominator(1) {};

    Rational(int numerator_value, int denominator_value) {
        if(numerator_value*denominator_value > 0){
            numerator_value = abs(numerator_value);
        }
        else{
            numerator_value = -1*abs(numerator_value);
        }
        denominator_value = abs(denominator_value);

        if (numerator_value == 0){
            numerator = 0;
            denominator = 1;
        }
        else{
            int gcd_value = gcd(numerator_value, denominator_value);
            numerator = numerator_value/gcd_value;
            denominator = denominator_value/gcd_value;
        };
    }

    Rational operator+( const Rational& rhs){
        int new_numerator = 0;
        int new_denominator = denominator;
        if(denominator != rhs.Denominator()) {
            new_numerator = numerator * rhs.Denominator() + rhs.Numerator() * denominator;
            new_denominator = rhs.Denominator() * denominator;
        }
        else {
            new_numerator = numerator + rhs.Numerator();
        }
        return Rational(new_numerator, new_denominator);
    }

    Rational operator-( const Rational& rhs) const{
        int new_numerator = 0;
        int new_denominator = denominator;
        if(denominator != rhs.Denominator()) {
            new_numerator = numerator * rhs.Denominator() - rhs.Numerator() * denominator;
            new_denominator = rhs.Denominator() * denominator;
        }
        else {
            new_numerator = numerator + rhs.Numerator();
        }
        return Rational(new_numerator, new_denominator);
    }

    bool operator==( const Rational& rhs){
        return (numerator == rhs.Numerator() && denominator == rhs.Denominator());
    }


    int Numerator() const{
        return numerator;
    }
    int Denominator() const{
        return denominator;
    }
};