/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.05.22 21:22:57
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int a, b;
    cin >> a >> b;
    int cnt = 0;
    if (a != b) {
        cout << min(a, b) * 2 << endl;
    } else {
        cout << a * 2 - 1 << endl;
    }
    return 0;
}