class MySin {
	int c, div;
	double r, b;
	public MySin(int min, int max, int div, int sta_c){
		if(sta_c == -1){
			sta_c = Rnd.get(0,div);
		}
		c = sta_c;
		this.div = div;
		r = (max-min)/2;
		b = (max+min)/2;
	}
	public MySin(int min, int max, int div){
		this(min, max, div, 0);
	}
	public int get(){
		c++; c %= div;
		double a = Math.PI * 2 * c / div;
		return (int)(Math.sin(a) * r + b);
	}
}

// EOF