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();

    int sum = 0;

    for(int i=0;i<2;i++){
      int button = 0;
      if(A > B){
        sum += A;
        A -= 1;
      }else{
        sum += 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