import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());
        int coins = 0;

        for (int i = 0; i < 2; i++) {
            coins += Math.max(A, B);
            if (A > B) {
                A--;
            } else {
                B--;
            }
        }
        System.out.print(coins);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz