import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		
		int total = 0;
		if(a>b) {
			total+=a;
			if(a-1>b)total+=a-1;
			else total+=b;
		}
		else{
			total+=b;
			if(b-1>a)total+=b-1;
			else total+=a;
		}
		
		System.out.println(total);
	}		
}
/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