import java.util.Scanner;

public class Main {
    public static void main(String... args) {
        // 入力
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();

        int x = 0;

        if (a > b) {
            x += a;
            a--;
            if (a > b) {
                x += a;
            } else {
                x += b;
            }
        } else {
            x += b;
            b--;
            if (b > a) {
                x += b;
            } else {
                x += a;
            }
        }
        System.out.println(x);
    }
}
/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