#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
typedef long long int ll;
using T_=pair<ll,ll>;


void routine(){
	ll a,b;
	cin >> a >> b;
	ll x = max<ll>(a,b),y = min<ll>(a,b);
	if(x == y){
		cout << (x+y-((x+y)/4)*4) << "\n";
		return;
	}
	cout << (-x+3*y-((-x+3*y)/4)*4) << "\n";
	return;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	ll t = 1;
	while(t--){
		routine();
	}
	return 0;
}