import java.io.*; import java.lang.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int m = in.nextInt(); int count=0; if(n>=1 && m<=Math.pow(10,9)) { if(n<=m) { System.out.print(m-n); } else System.out.print(n-m); } } }