#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using Graph=vector<vector<pair<int,int>>>;
#define INF 1000000000000000000
#define MOD 1000000007

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