import java.util.*;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try(Scanner scan = new Scanner(System.in);){
			int A = Integer.parseInt(scan.next());
			int B = Integer.parseInt(scan.next());
			int max = 0;
			if(A == B) {
				max = 2 * A;
			}else if(A > B) {
				max = 2 * A - 1;
			}else {
				max = 2 * B - 1;
			}
			System.out.println(max);
		}
	}
}

/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