#include <bits/stdc++.h>
using namespace std;

#ifdef _RUTHEN
#include "debug.hpp"
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll A, B;
    cin >> A >> B;
    if (A < B) swap(A, B);
    // A>=B
    ll ans = A + B;
    ans += max(0LL, A - B - 1);
    cout << ans << '\n';
    return 0;
}