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 X = 0;
		int Y = 0;

			if (A >= B) {
				X = A;
				if (A-1 >= B) {
					Y = A-1;
				}else {
					Y = B;
				}
			} else if (A < B) {
				X = B;
				if (B-1 >= A) {
					Y = B-1;
				}else {
					Y = A;
				}
			}
		System.out.println(X+Y);
	}
}
/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