#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll=long long;
using Graph=vector<vector<pair<int,ll>>>;
#define INF 1000000000000000000
#define MOD 998244353
#define MAX 1000000

int main(){
  int A,B;
  cin>>A>>B;
  if(A==B){
    cout<<A+B<<'\n';
  }else{
    int M=max(A,B);
    int m=min(A,B);
    cout<<(2*m+1)+2*(M-(m+1))<<'\n';
  }
}