#include <bits/stdc++.h>
#include <atcoder/mincostflow>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<int(n);i++)

int main(){
  int a,b;
  cin>>a>>b;
  if(a<b) swap(a,b);
  int ans=1e9;
  for(int x=0;x<=b;x++){
    int y=b-x;
    int z=a-x;
    int w=b-y;
    if(z<0||y<0) continue;
    ans=min(ans,abs(y+z-x-w));
  }
  cout<<ans<<endl;
}