#include <bits/stdc++.h>
using namespace std;
int main(void){
    int x,y;
    int check = 0;
    
    cin >> x >> y;
    
    if(x == 0 && y == 0)check = 0;
    else if(x == y)check = 1;
    else if(x == 0 || y == 0)check = 1;
    else check = 2;
    
    cout << check << endl;
    
    
    return 0;
}