#include <bits/stdc++.h>

using namespace std;
using ll = long long;


#define rep(i,n) for (ll i=0; i<(n); i++)
#define reps(i,n) for (ll i=1; i<=(n); i++)
#define for_(i,a,b) for (ll i=(a); i<(b); i++)
#define pb push_back
const ll MM = 1000000000;

long long cnt(ll x){
  ll xx=to_string(x).length();
  return xx;
}

ll triangle(ll n) {
    return n * (n + 1) / 2;
}

int main(){
 ll n,m;
 cin>>n>>m;
 if(n==0 && m==0){
  cout<<0<<endl;
 }
 else if(n==0||m==0){
  cout<<1<<endl;
 }
 else if(n==m){
  cout<<1<<endl;
 }
 else{
  cout<<2<<endl;
 }
}