fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let v: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	let (a, b) = (v[0].max(v[1]) * 2, v[0] == v[1]);
	println!("{}", a - if b { 0 } else { 1 })
}