import java.util.Scanner;

class Main{
  static int answer(int a, int b) {
    int answer = 0;
    for(int i = 0; i < 2; i++) {
      if(a>=b) {
        answer += a;
        a--;
      }else {
        answer += b;
        b--;
      }
    }
    return answer;
  }

  public static void main(String[] args) {
    Scanner stdIn = new Scanner(System.in);
    int a = stdIn.nextInt();
    int b = stdIn.nextInt();
    System.out.println(answer(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