import java.util.*;
import java.io.*;

public class Fraction {
   private int numerator;
   private int denominator;

    public int getNumerator() {
        return numerator;
    }

    public void setNumerator(int numerator) {
        this.numerator = numerator;
    }

    public int getDenominator() {
        return denominator;
    }

    public void setDenominator(int denominator) {
        if(denominator == 0) {
            this.denominator = this.denominator;
        } else {
            this.denominator = denominator;
        }
    }
    public Fraction(int numerator, int denominator) {
        this.numerator = numerator;
        this.denominator = 1;
    }
    public int GCD(int a, int b) {
        while(b != 0) {
            int temp = a%b;
            a=b;
            b=temp;
        }
        return a;
    }
    public Fraction reduce() {
        int temp = GCD(this.numerator, this.denominator);
        this.numerator = numerator/temp;
        this.denominator = denominator/temp;
        return this;
    }
    public int LCM(int a, int b) {
        int temp = a*b;
        temp = Math.abs(temp) / GCD(a, b);
        return temp;
    }
    public Fraction add(Fraction F) {
        if(F.denominator == 0) {
            return this.reduce();
        } else {
            this.numerator = this.numerator * (LCM(this.denominator, F.denominator) / this.denominator);
            this.denominator = this.denominator * (LCM(this.denominator, F.denominator) / this.denominator);
            F.numerator *= (LCM(this.denominator, F.denominator) / F.denominator);
            this.numerator = this.numerator + F.numerator;
            return this.reduce();
        }
    }
    public Fraction subtract(Fraction F) {
        if(F.denominator == 0) {
            return this.reduce();
        } else {
            this.numerator = this.numerator * (LCM(this.denominator, F.denominator) / this.denominator);
            this.denominator = this.denominator * (LCM(this.denominator, F.denominator) / this.denominator);
            F.numerator *= (LCM(this.denominator, F.denominator) / F.denominator);
            this.numerator = this.numerator - F.numerator;
            return this.reduce();
        }
    }
    public Fraction multiply(Fraction F) {
        if(F.numerator == 0) {
            return this.reduce();
        } else {
            this.numerator = this.numerator * F.numerator;
            this.denominator = this.denominator * F.denominator;
            return this.reduce();
        }
    }
    public Fraction divide(Fraction F) {
        if(F.denominator == 0) {
            return this.reduce();
        } else {
            this.numerator = this.numerator * F.denominator;
            this.denominator = this.denominator * F.numerator;
            return this.reduce();
        }
    }
    public boolean equals(Object obj) {
        if (obj instanceof Fraction) {
            Fraction F = (Fraction) obj;
            this.reduce();
            F.reduce();
            if (this.numerator == F.numerator && this.denominator == F.denominator) {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
}