import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int b = Integer.parseInt(sc.next()); b Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int ans = 0; ans 0 if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		} a == b a b {
			ans = a * 2;
		} ans = a * 2 ans a * 2 a 2 {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		} ans = Math.max(a, b) + Math.max(a, b) - 1 ans Math.max(a, b) + Math.max(a, b) - 1 Math.max(a, b) + Math.max(a, b) Math.max(a, b) Math.max Math a b Math.max(a, b) Math.max Math a b 1 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = Integer.parseInt(sc.next());
		int b = Integer.parseInt(sc.next());
		int ans = 0;
		if (a == b) {
			ans = a * 2;
		} else {
			ans = Math.max(a, b) + Math.max(a, b) - 1;
		}
		System.out.println(ans);
	}

}
