#include <iostream>

using namespace std;

class Rational {

public:

Rational() {

// Реализуйте конструктор по умолчанию

p = 0;

q = 1;

divider = 1;

}

Rational(int numerator, int denominator) {

// Реализуйте конструктор

p = numerator;

q = denominator;

SignedFactional();

p = Numerator();

q = Denominator();

}

void SignedFactional()

{

if(p == 0)

{

q = 1;

}

else if(p < 0 && q < 0)

{

p = abs(p);

q = abs(q);

}

else if(p < 0 || q < 0)

{

p = abs(p) * (-1);

q = abs(q);

}

divider = Divider();

}

int Divider() {

if(p == q)

{

return p;

}

else if(p == 0 && q!= 0)

{

return q;

}

else if(p != 0 && q == 0)

{

return p; //bad case!

}

else

{

int dividend_t = 0;

int divider_t = 0;

int reminder = 0;

if(p > q)

{

dividend_t = p;

divider_t = q;

}

else

{

dividend_t = q;

divider_t = p;

}

reminder = dividend_t % divider_t;

while(reminder != 0)

{

dividend_t = divider_t;

divider_t = reminder;

reminder = dividend_t % divider_t;

}

return abs(divider_t);

}

}

int Numerator() const {

// Реализуйте этот метод

return (p / divider);

}

int Denominator() const {

// Реализуйте этот метод

return (q / divider);

}

const bool operator == (const Rational& a) const

{

if((a.p == p) && (a.q == q))

return true;

else return false;

}

Rational operator + (const Rational& x)

{

Rational result;

if(x.q == q)

{

result.p = x.p + p;

result.q = x.q;

}

else

{

result.p = (x.p * q) + (p * x.q);

result.q = x.q * q;

}

result.SignedFactional();

// cout << result.divider << endl;

result.p = result.Numerator();

// cout << result.p << endl;

result.q = result.Denominator();

// cout << result.q << endl;

return result;

}

Rational operator - (const Rational& x)

{

Rational result;

if(x.q == q)

{

result.p = p - x.p;

result.q = x.q;

}

else

{

result.p = (p * x.q) - (x.p * q);

result.q = x.q * q;

}

result.SignedFactional();

//cout << result.divider << endl;

result.p = result.Numerator();

//cout << result.p << endl;

result.q = result.Denominator();

//cout << result.q << endl;

return result;

}

private:

int divider;

int p;

int q;

// Добавьте поля

};

int main() {

{

Rational r1(4, 6);

Rational r2(2, 3);

bool equal = r1 == r2;

if (!equal) {

cout << "4/6 != 2/3" << endl;

return 1;

}

}

{

Rational a(2, 3);

Rational b(4, 3);

Rational c = a + b;

bool equal = c == Rational(2, 1);

if (!equal) {

cout << "2/3 + 4/3 != 2" << endl;

return 2;

}

}

{

Rational a(5, 7);

Rational b(2, 9);

Rational c = a - b;

bool equal = c == Rational(31, 63);

if (!equal) {

cout << "5/7 - 2/9 != 31/63" << endl;

//getchar();

return 3;

}

}

cout << "OK" << endl;

getchar();

return 0;

}