/* -*- 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);

  int mind = a + b, c = min(a, b);
  for (int x = 0; x <= c; x++) {
    int u = x * 2, v = (a + b) - u;
    mind = min(mind, abs(u - v));
  }
  printf("%d\n", mind);

  return 0;
}