#include <iostream>

int gcd (int a, int b) {
    if (b == 0) {
        return a;
    } else {
        return gcd (b, a % b);
    }
}

class Rational {
 private:
    int x, y;

 public:
    Rational(int a = 0, int b = 1): x(a), y(b) {
        standart();
    }

    int numerator() const {
        return x;
    }

    int denominator() const {
        return y;
    }

    int& num() {
        return x;
    }

    int& den() {
        return y;
    }

    void standart() {
        if (y < 0) {
            y = -y;
            x = -x;
        }
        int g = gcd(std::abs(x), std::abs(y));
        x /= g;
y /= g;
    }

};