#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T, class U> using Pa = pair<T, U>;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int A,B;
    cin >> A >> B;
    if(A>B) swap(A,B);
    if(A==1 && B==1) cout << 1 << "\n";
    else if(A==1){
        cout << (B==2? 2:3) << "\n";
    }
    else{
        B--;
        if(A>B) swap(A,B);
        if(A==B) cout << 2*A << "\n";
        else cout << 2*min(A,B)+1 << "\n";
    }
}