import java.util.*;
public class Main {

	static int a,b,total;

	public static void main(String[] args){
      	Scanner sc = new Scanner(System.in);
		a = sc.nextInt();
		b = sc.nextInt();
		total=0;

		push();
		push();

		System.out.println(total);
	}

	public static void push() {
		if(a>=b) {
			total+=a;
			a--;
		}else {
			total+=b;
			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