#include <bits/stdc++.h>
using namespace std;

int main()
{
	int A, B;
	cin >> A >> B;
	
	if(A == 0 && B == 0)
	{
		cout << 0 << endl;
		return 0;
	}
	if(A == B)
	{
		cout << A * 2 << endl;
		return 0;
	}
	if(A > B) swap(A, B);
	cout << 2 * B - 1 << endl;
	return 0;
}