import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        if (a == b) {
            System.out.println(a + b - 1);
        } else {
            System.out.println(Math.min(a, b) * 2);
        }
    }
}