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