#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001


int main(){
	
	int a,b;
	cin>>a>>b;
	int ans = Inf32;
	for(int i=0;i<=a;i++){
		for(int j=0;j<=b;j++){
			int x = i+j;
			int y = a+b - i - j;
			if(i+(b-j)!=a || j+(a-i)!=b)continue;
			ans = min(ans,abs(x-y));
		}
		
		
	}
	cout<<ans<<endl;
	
	return 0;
}