import java.util.*;
import java.io.*;

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

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

        int coin = 0;
        for (int i = 0; i < 2; i++) {
            if (A > B) {
                coin += A;
                A--;
            } else {
                coin += B;
                B--;
            }
        }
        out.printf("%d\n", coin);
        out.flush();
    }
}

/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