import java.util.Scanner; public class No643 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int x=Integer.parseInt(sc.next()); int y=Integer.parseInt(sc.next()); if(x==y) { System.out.println(0); }else if((x==0)||((x==-y)&&(x<0))) { System.out.println(2); }else if((y==0)||((x==-y)&&(x>0))) { System.out.println(1); }else { System.out.println(-1); } } }