import java.util.*;

public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int A,B;
      A = sc.nextInt();
      B = sc.nextInt();
      int result = 0;
      if (A >= B){
      	result = result + A;
        A = A - 1;
      }
      else{
      	result = result + B;
        B = B - 1;
      }
            if (A >= B){
      	result = result + A;
        A = A - 1;
      }
      else{
      	result = result + B;
        B = B - 1;
      }
      System.out.println(result);
    }
}
/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