import 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 c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  } main {
		Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  } 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 c = Math.max(a,b); c Math.max(a,b) Math.max Math a b System.out.println(Math.max(2*c-1,a+b)) System.out.println System.out System System.out Math.max(2*c-1,a+b) Math.max Math 2*c-1 2*c 2 c 1 a+b a b 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 c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  }
} Main
import 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 c = Math.max(a,b);
		System.out.println(Math.max(2*c-1,a+b));
  }
}
