import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int A; int B; int X;
		A = scan.nextInt();
		B = scan.nextInt();
		X = 0;
		if(A>=B){
		X=X+A;
		A=A-1;
		}else if(A<=B){
			X=X+B;
			B=B-1;
		}
		if(A>=B){
		X=X+A;
		A=A-1;
		}else if(A<=B){
		X=X+B;
		B=B-1;
}
		System.out.println(X);
		scan.close();
	}
}
/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