import java.util.Scanner;

public class Main {
	private static void p(String s) {System.out.println(s);}
	static Scanner sc = new Scanner(System.in);
	static int a,b,c,n,m;
	public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	private static void p(String s) {System.out.println(s);}
	static Scanner sc = new Scanner(System.in);
	static int a,b,c,n,m;
	public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	}
} Main static Scanner sc = new Scanner(System.in); sc new Scanner(System.in) static int a a b b c c n n m; m private static void p(String s) {System.out.println(s);} p {System.out.println(s);} System.out.println(s) System.out.println System.out System System.out s String s s public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	} main {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	} a=sc.nextInt() a sc.nextInt() sc.nextInt sc 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=max+Math.max(max-1, min); ans max+Math.max(max-1, min) max Math.max(max-1, min) Math.max Math max-1 max 1 min p(""+ans) p ""+ans "" ans String[] args args public class Main {
	private static void p(String s) {System.out.println(s);}
	static Scanner sc = new Scanner(System.in);
	static int a,b,c,n,m;
	public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	}
} public class Main {
	private static void p(String s) {System.out.println(s);}
	static Scanner sc = new Scanner(System.in);
	static int a,b,c,n,m;
	public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	}
} Main
import java.util.Scanner;

public class Main {
	private static void p(String s) {System.out.println(s);}
	static Scanner sc = new Scanner(System.in);
	static int a,b,c,n,m;
	public static void main(String[] args) {
		a=sc.nextInt();
		b=sc.nextInt();
		int max=Math.max(a, b);
		int min=Math.min(a,b);
		int ans=max+Math.max(max-1, min);
		p(""+ans);
	}
}
