import java.util.Arrays;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int A = sc.nextInt();
    int B = sc.nextInt();
    Main abc124A = new Main();
    System.out.println(abc124A.solve(A, B));
  }

  public int solve(int A, int B){
    int[] array = new int[]{A, B};
    Arrays.sort(array);
    int temp = array[1];
    array[1] = array[1] - 1;
    Arrays.sort(array);
    temp += array[1];
    return temp;
  }
}

/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