#include <bits/stdc++.h>
using namespace std;
int main(){
  int A, B;
  cin >> A >> B;
  if (A >= B + 1){
    cout << 2 * B << endl;
  } else if (B >= A + 1){
    cout << 2 * A << endl;
  } else {
    cout << A + B - 1 << endl;
  }
}