#include <iostream>

#include <cmath>
using namespace std;
int gcd(int a, int b) {
    if (b < 0) { b = -b; }
    if (a < 0) { a = -a; }
    return !b ? a : gcd(b, a % b);
}
class Rational {
private:
    long long p, q;

public:
    Rational(long long p_new = 0, long long q_new = 1) : p(p_new), q(q_new) {
        if (q < 0) {
            q = -q;
            p = -p;
        }
    }
    long long Q() const {
        return q;
    }
    long long P() const {
        return p;
    }
    long long numerator() const {
        return p;
    }
    long long denominator() const {
        return q;
    }
    Rational operator += (const Rational& other) {
        long long numerator = p * other.Q() + other.P() * q;
        long long denominator = q * other.Q();
        long long reduce = gcd(numerator, denominator);
        if (denominator < 0) {
            numerator = -numerator;
            denominator = -denominator;
        }
        *this = Rational(numerator / reduce, denominator / reduce);
        return *this;
    }
    Rational operator -= (const Rational& other) {
        long long numerator = p * other.Q() - other.P() * q;
        long long denominator = q * other.Q();
        long long reduce = gcd(numerator, denominator);
        if (denominator < 0) {
            numerator = -numerator;
            denominator = -denominator;
        }
        *this = Rational(numerator / reduce, denominator / reduce);
        return *this;
    }
    Rational operator *= (const Rational& other) {
        long long numerator = p * other.P();
        long long denominator = q * other.Q();
        long long reduce = gcd(numerator, denominator);
        if (denominator < 0) {
            numerator = -numerator;
            denominator = -denominator;
        }
        *this = Rational(numerator / reduce, denominator / reduce);
        return *this;
    }
    Rational operator /= (const Rational& other) {
        long long numerator = p * other.q;
        long long denominator = q * other.p;
        long long reduce = gcd(numerator, denominator);
        if (denominator < 0) {
            numerator = -numerator;
            denominator = -denominator;
        }
        numerator /= reduce;
        denominator /= reduce;
        *this = Rational(+numerator, +denominator);
        return *this;
    }
    Rational& operator--(int) {
        *this -= Rational(1, 1);
        return *this;
    }
    Rational operator--() {
        long long a = p, b = q;
        p = p - q;
        return (Rational(a, b));
    }
    Rational& operator++() {
        *this += Rational(1, 1);
        return *this;
        }
    Rational operator++(int) {
        long long a = p, b = q;
        p = p + q;
        return (Rational(a, b));
    }
};
Rational operator + (const Rational& r) {
    return Rational(+r.P(), +r.Q());
}
Rational operator - (const Rational& r) {
    return Rational(-r.P(), +r.Q());
}
Rational operator + (Rational r1, const Rational& r2) {
    return r1 += r2;
}
Rational operator - (Rational r1, const Rational& r2) {
    return r1 -= r2;
}
Rational operator * (Rational r1, const Rational& r2) {
    return r1 *= r2;
}
Rational operator / (Rational r1, const Rational& r2) {
    return r1 /= r2;
}
bool operator == (const Rational& r1, const Rational& r2) {
    return r1.P() == r2.P() && r1.Q() == r2.Q();
}
bool operator != (const Rational& r1, const Rational& r2) {
    return r1.P() != r2.P() || r1.Q() != r2.Q();
}