import java.util.Scanner;

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

        int anum = Integer.parseInt(s.next());
        int bnum = Integer.parseInt(s.next());

        int coins = 0;
        for (int i = 0; i < 2; i++) {
            if (anum < bnum) {
                coins += bnum;
                bnum--;
            } else{
                coins += anum;
                anum--;
            }
        }
        System.out.println(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