import java.util.Scanner;
public class Main{
  	public static void main (String [] args){
      	Scanner scanner = new Scanner (System.in);
      	int A = scanner.nextInt();
      	int B = scanner.nextInt();
      	int sum = Math.max(A,B);
      	if (A > B) A--;
        else B--;
      	sum += Math.max(A,B);
      	System.out.println(sum);
    }
}
/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