#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<math.h>
#define all(x) x.begin(),x.end()
#define gall(x) x.begin(),x.end(),greater<>()
#define pb push_back
#define ll long long 
#define P pair<double,double>
#define LP pair<ll,ll>
using namespace std;
int main() {
	ll a, b, mi = 1000000000, cnt = 0;
	cin >>a>>b;
	mi = min(mi, min(a, b));
	cnt = mi * 2 +1+ ((a + b-1) - mi*2) * 2 ;
	cout << cnt << endl;
	return 0;
}