#include <bits/stdc++.h>
#define int long long
#define double long double
using namespace std;
const int MOD = 1000000007;
const int INF = 1e14;
using Graph = vector<vector<int>>;

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