#include<bits/stdc++.h>
#define rep(i, n) for (long long i = 0; i < (int)(n); i++)
#define put(i) cout<<fixed<<i<<endl
using namespace std;
using ll = long long;

int main(){
    ll a,b; cin >> a >> b;
    if(a == 1 || b == 1){
        put(1);
    }else{
        put(a+b-abs(a-b));
    }
}