백준 #2420번 사파리 월드

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		long a = sc.nextInt();
		long b = sc.nextInt();
		
		if(a > b) {
			System.out.println(a - b);
		}else if(b > a) {
			System.out.println(b - a);
		}
		sc.close();
	}
}