shit.java

class Rat {
	private int num, den;

	Rat() {
		num = 1;
		den = 1;
	}

	Rat(int num, int den) {
		this.num = num;
		this.den = den;
	}

	public void setNum(int num) { 
		if(num != 0) this.num = num;
	}

	public void setDen(int den) {
		if(den != 0) this.den = den; 
	}

	public int getNum() { return num; }
	public int getDen() { return den; }
	public Rat add(Rat rat) { return new Rat(num + rat.getNum(), den + rat.getDen()); }

	public boolean isEqual(Rat rat) {
		if(num == rat.getNum() && den == rat.getDen()) return true;
		return false;
	}
}