#include <bits/stdc++.h>
 using namespace std;
 using pii = pair<int, int>;
 using ll = long long;
 #define rep(i, j, n) for(int i = j; i < (int)(n); i++)
 const ll MOD = 1000000007;
 const ll INFL = (1LL << 60);
 const int INFI = (1 << 30);

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