import java.util.Scanner;

public class Main {
public static void main(String[]args) {
	Scanner tc = new Scanner (System.in);
	int a,b;
	a=tc.nextInt();
	b=tc.nextInt();
	if(a>b) {
		System.out.println(a*2-1);
	}
	if(b>a) {
		System.out.println(b*2-1);
	}
	if(a==b) {
		System.out.println(a+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