import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;
import java.util.Objects;
import java.lang.StringBuilder;

public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();

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

    System.out.println(coins);

  }
}

/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