#include <bits/stdc++.h>

int main(int, char **) {
    int a, b;
    std::cin >> a >> b;
    if (a == b) {
        std::cout << (a + b - 1) << std::endl;
        return 0;
    }
    std::cout << (std::min(a, b) * 2) << std::endl;
    return 0;
}