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();
    sc.close();
    int sum =0;
    
    if (a>=b) {sum += a;
    	a= a-1;}
    else {sum += b;
    	b= b-1;}
    if (a>=b) {sum += a;
	a= a-1;}
else {sum += b;
	b= b-1;}
    
   
   
   
      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