#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (int)n; i++)
using ll = long long;

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