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

void solve() {
  int a, b, c;
  cin >> a >> b;
  c = (min(a, b) * 2);
  cout << ((a == b) ? c - 1 : c) << endl;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  solve();
  getchar();
}