#include<bits/stdc++.h>
using namespace std;

int main()
{
	int x,y;
	cin >> x >> y;
	if(x==0 && y==0)
		cout << "0\n";
	else if(abs(x)==abs(y) || x==0 || y==0)
		cout << "1\n";
	else
		cout << "2\n";
}