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

int main(){
    
    int x ,y ;
    cin >> x>> y;
    if(x==0 && y==0){
        cout<< 0 <<endl;
    }
    else if(x==0||y==0)
    {
        cout<< 1 <<endl;
    }   
    else{    
        if(x==y)
        {
            cout<< 1 <<endl;
        }
        else
        {
            cout<< 2 <<endl;
        }
    }
    return 0;
}