#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;


void solve() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  ll a,b;
  cin>>a>>b;
  ll ans=min(a,b)*2-1;
  if(a!=b){
    ans++;
  }
  cout<<ans<<endl;
} 

int main() { solve();system("pause"); }