0381:

import java.io.*;
import java.util.*;

class Main {
    void solve(){
        Scanner sc = new Scanner( System.in );
        int x1 = sc.nextInt();
        int x2 = sc.nextInt();
        System.out.println( Math.abs( x1 - x2 ) );
    }
    public static void main( String[] a ) {new Main().solve(); }
}