#include<stdio.h>

int gcd(int,int);
void simplify(int*,int*);

struct rational {
        int num;
        int den;

        rational(){
                num = 0;
                den = 1;
        }

        rational(int a){
                num = a;
                den = 1;
        }

        int numerator(){
                return num;
        }

        int denominator(){
                return den;
        }

};

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

void simplify(int* a,int* b){
       int g  = gcd(*a, *b);
       *a /= g;
       *b /= g;
}

void simplify(long* a,long* b){
       long g  = gcd(*a, *b);
       *a /= g;
       *b /= g;
}

int gcd(long a, long b){
        if(a < 0) return gcd(-a,b);
        if(b < 0) return gcd(a,-b);
        if(b == 0) return a;
        return gcd(b, a%b);
}

rational operator+(rational a,rational b){
        rational c;
        c.den = a.denominator() * b.denominator();
        c.num = (a.numerator() * b.denominator()) + (a.denominator() * b.numerator());
        simplify(&c.num,&c.den);
        return c;
}

rational operator+(rational a,int b){
        rational c;
        c.den = a.denominator();
        c.num = a.numerator() + b;
        simplify(&c.num,&c.den);
        return c;
}

rational operator-(rational a, rational b){
        rational c;
        c.den = a.denominator() * b.denominator();
        c.num = (a.numerator() * b.denominator()) - (a.denominator() * b.numerator());
        simplify(&c.num,&c.den);
        return c;
}

rational operator-(int a, rational b){
        rational c;
        c.den = b.denominator();
        c.num = a * b.denominator() + b.numerator();
        simplify(&c.num, &c.den);
        return c;
}

rational operator-(rational a, int b){
        rational c;
        c.den = a.denominator();
        c.num = a.numerator() - b;
        simplify(&c.num, &c.den);
        return c;
}

rational operator*(rational a, rational b){
        rational c;
        c.den = a.denominator() * b.denominator();
        c.num = a.numerator() * b.numerator();
        simplify(&c.num, &c.den);
        return c;
}

rational operator*(rational a,int b){
        rational c;
        c.den = a.denominator();
        c.num = a.numerator() * b;
        simplify(&c.num, &c.den);
        return c;
}

rational operator/(rational a, rational b){
        rational c;
        long one = a.numerator() * b.denominator();
        long two = a.denominator() * b.numerator();
        simplify(&one, &two);
        c.num = (int)one;
        c.den = (int)two;
        return c;
}

rational operator/(int a, rational b){
        rational c;
        c.num = a * b.denominator();
        c.den = b.numerator();
        simplify(&c.num, &c.den);
        return c;
}

rational operator/(rational a,int b){
        rational c;
        c.num = a.numerator();
        c.den = a.denominator() * b;
        simplify(&c.num, &c.den);
        return c;
}