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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

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


}