#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    ll A, B;
    cin >> A >> B;
    if (A > B) swap(A, B);
    if (A == B){
        cout << A+B << endl;
        return 0;
    }

    cout << A*2+1+(B-A-1) * 2 << endl;

    return 0;
}