/* -*- coding: utf-8 -*-
 *
 * 2239.cc:  No.2239 Friday - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int a, b;
  scanf("%d%d", &a, &b);
  if (a < b) swap(a, b);
  printf("%d\n", a - b);

  return 0;
}