#include <bits/stdc++.h>

using namespace std;
 
#define REP(i, n) for (ll i = 0; i < n; i++)
#define REPR(i, n) for (ll i = n; i >= 0; i--)
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define FORR(i, m, n) for (ll i = m; i >= n; i--)
#define REPO(i, n) for (ll i = 1; i <= n; i++)
#define ll long long
#define INF (ll)1 << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(), n.end()
#define MOD 1000000007
#define P pair<ll, ll>
using namespace std;


int main() {
   ll a, b;
   cin >> a >> b;
   if(a == 0 and b == 0)cout << 0 <<endl;
   else if(a == b)cout << a + b <<endl;
   else{
       if(a > b)swap(a, b);
       if(a == 0)cout << b * 2;
       else cout << 2 * a + 1 + 2 * (b - a - 1)<<endl;
   }
}