import java.util.*;
public 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) {
      if (A < (B - 1)) {
        System.out.println(B + (B - 1));
      } else {
        System.out.println(A + B);
      }
    } else {
      if (B < (A - 1)) {
        System.out.println(A + (A - 1));
      } else {
        System.out.println(A + B);
      }
    }

  }
}
/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