import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        if(x < 0){
        	x *= -1;
        }
        int y = sc.nextInt();
        if(y < 0){
        	y *= -1;
        }
        
		if(x == 0 && y == 0){
        System.out.println(0);
    	}else if(x == 0 ||  y == 0 || x == y){
    		System.out.println(1);
		}else{
			System.out.println(2);
		}
    }
}