import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);
    int A = sc.nextInt();
    int B=  sc.nextInt();
    int coin=0;
    
    for(int i=0;i<2;i++){
     if(A>B){
      coin+=A;
       A-=1;
     }else{
        coin+=B;
       B-=1;
    }
  }System.out.println(coin);
}
}


/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