import java.util.*;
public class Main {
  
 public static void main(String[] args)
 {
  Scanner scan = new Scanner(System.in);
  int x = scan.nextInt();
  int y = scan.nextInt();
  if(x==y){System.out.println(x+y);}
  else if(x>y){System.out.println(x*2-1);}
  else{System.out.println(y*2-1);}
 }

}

/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