import java.util.*;

class Main {
  public static void main (String[] args) {
    Scanner sc = new Scanner(System.in);
    int a=sc.nextInt();
    int b=sc.nextInt();
    if(a>b){
      System.out.print(a+(a-1));
    }else if(a<b){
      System.out.print(b+(b-1));
    }else if(a==b){
      System.out.print(a*2);
    }
  }
}
/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