public class NDrob {
    private int numerator;
    private int denominator = 1;

    public NDrob(int numerator, int denominator) {
        if (denominator == 0) {
            System.out.println("Denominator can't be zero. Choose another one.");
            return;
        }
        this.numerator = numerator * (denominator < 0 ? -1 : 1);
        this.denominator = Math.abs(denominator);
        normalization();
    }
    public int getNumerator() {
        return numerator;
    }

    public int getDenominator() {
        return denominator;
    }

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

    public void setDenominator(int denominator) {
        if (denominator == 0) {
            System.out.println("Denominator can't be zero. Choose another one.");
            return;
        }
        if (denominator < 0) {
            this.numerator *= -1;
        }
    }

    private int NOD(int numerator, int denominator) {
        while (numerator != 0 && denominator != 0) {
            if (numerator > denominator) {
                numerator %= denominator;
            } else {
                denominator %= numerator;
            }
        }
        return numerator + denominator;
    }

    private void normalization() {
        int n = NOD(Math.abs(numerator), Math.abs(denominator));
        numerator /= n;
        denominator /= n;
    }

    public int Celai() {
        return (numerator / denominator);
    }

    public NDrob Drobnai() {
        return new NDrob(numerator % denominator, denominator);
    }

    void print() {
        System.out.println(numerator + "/" + denominator);
    }
       public NDrob delenie(NDrob odj) {
       int numer =numerator* odj.denominator;
       int denom = denominator* odj.numerator;
        return  new NDrob(numer, denom);
    }
    public NDrob umnoj(NDrob odj) {
        int numer =numerator* odj.numerator;
        int denom = denominator* odj.denominator;
        return  new NDrob(numer, denom);
    }
    public NDrob sum(NDrob odj) {
        int numer =numerator*odj.denominator+ odj.numerator*denominator;
        int denom = denominator* odj.denominator;
        return  new NDrob(numer, denom);
    }
    public NDrob vichitanie(NDrob odj) {
        int numer =(numerator*odj.denominator)-(odj.numerator*denominator);
        int denom = denominator* odj.denominator;
        return  new NDrob(numer, denom);
    }
}