public class RationalFraction {
    private int x;
    private int y;

    public int getX() {
        return x;
    }

    public void setX(int x) {
        this.x = x;
    }

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }

    public RationalFraction() {
        this(0, 0);
    }

    public RationalFraction(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public void reduce() {
        for (int i = x; i >= 1; i--) {
            if (x % i == 0 && y % i == 0) {
                x /= i;
                y /= i;
            }
        }
    }

    public RationalFraction add(RationalFraction rat) {
        RationalFraction rt = new RationalFraction(x * rat.getY() + rat.getX() * y, y * rat.getY());
        rt.reduce();
        return rt;
    }
    public void add2(RationalFraction rat) {
        x = x * rat.getY() + rat.getX() * y;
        y = y * rat.getY();
        reduce();
    }
    public RationalFraction sub(RationalFraction rat) {
        RationalFraction rt = new RationalFraction(x * rat.getY() - rat.getX() * y, y * rat.getY());
        rt.reduce();
        return rt;
    }
    public void sub2(RationalFraction rat) {
        x = x * rat.getY() - rat.getX() * y;
        y = y * rat.getY();
        reduce();
    }
    public RationalFraction mult(RationalFraction rat) {
        RationalFraction rt = new RationalFraction(x * rat.getX(), y * rat.getY());
        rt.reduce();
        return rt;
    }
    public void mult2(RationalFraction rat) {
        x = x * rat.getX();
        y = y * rat.getY();
        this.reduce();
    }
    public RationalFraction div(RationalFraction rat) {
        x = x * rat.getY();
        y = y * rat.getX();
        this.reduce();
        return new RationalFraction(x, y);
    }
    public void div2(RationalFraction rat) {
        x = x * rat.getY();
        y = y * rat.getX();
        reduce();
    }
    public String toString() {
        return (x + "/" + y);
    }
    public double value() {
        return x / y;
    }
    public boolean equals(RationalFraction rat) {
        rat.reduce();
        this.reduce();
        return (x == rat.getX() && y == rat.getY());
    }
    public int numberPart() {
        return x / y;
    }
}