#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>

using namespace std;

int main() {

    int A, B;
    cin >> A >> B;

    if (A > B or A < B) {
        cout << min(A, B) * 2 << endl;
    } else {
        cout << A * 2 - 1 << endl;
    }

    return 0;
}