import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int count = 0; count 0 count += Math.max(a, b) count Math.max(a, b) Math.max Math a b count += Math.max(Math.max(a, b) - 1, Math.min(a, b)) count Math.max(Math.max(a, b) - 1, Math.min(a, b)) Math.max Math Math.max(a, b) - 1 Math.max(a, b) Math.max Math a b 1 Math.min(a, b) Math.min Math a b System.out.println(count) System.out.println System.out System System.out count sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int count = 0;
		count += Math.max(a, b);
		count += Math.max(Math.max(a, b) - 1, Math.min(a, b));
		System.out.println(count);
		sc.close();
	}
}
