#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
// #define MOD 1000000007
#define MOD 998244353


int main(){
  
  int a,b;
  cin >> a >> b;
  if(a > b)swap(a,b);
  int res = MOD;
  rep(i,a+1){
    res = min(1ll*res,abs(2*i - (a+b-2*i)));
  }
  cout << res << "\n";
  

  return 0;
}