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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, 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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, 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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, min);
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, 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 ans = 0; ans 0 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 ans += max ans max ans += Math.max(max-1, min) ans Math.max(max-1, min) Math.max Math max-1 max 1 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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, 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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, 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 ans = 0;
		
		int max = Math.max(a, b);
		int min = Math.min(a, b);
		//System.out.println("max="+max);
		//System.out.println("min="+min);
		ans += max;
		ans += Math.max(max-1, min);
		System.out.println(ans);
	}

}