import java.util.*; 

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;
		ans+=Math.max(a,b);
  		if(a<=b){
          b--;
        }else{
          a--;
        }
  		ans+=Math.max(a,b);
  		
    
    	System.out.println(ans);
    }
} import java.util.*; util.* java 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;
		ans+=Math.max(a,b);
  		if(a<=b){
          b--;
        }else{
          a--;
        }
  		ans+=Math.max(a,b);
  		
    
    	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;
		ans+=Math.max(a,b);
  		if(a<=b){
          b--;
        }else{
          a--;
        }
  		ans+=Math.max(a,b);
  		
    
    	System.out.println(ans);
    } main {
	Scanner sc=new Scanner(System.in);
        int a=sc.nextInt();
        int b=sc.nextInt();
		int ans=0;
		ans+=Math.max(a,b);
  		if(a<=b){
          b--;
        }else{
          a--;
        }
  		ans+=Math.max(a,b);
  		
    
    	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 ans+=Math.max(a,b) ans Math.max(a,b) Math.max Math a b if(a<=b){
          b--;
        }else{
          a--;
        } a<=b a b {
          b--;
        } b-- b {
          a--;
        } a-- a ans+=Math.max(a,b) ans Math.max(a,b) Math.max Math a b System.out.println(ans) System.out.println System.out System System.out ans String[] args args
import java.util.*; 

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;
		ans+=Math.max(a,b);
  		if(a<=b){
          b--;
        }else{
          a--;
        }
  		ans+=Math.max(a,b);
  		
    
    	System.out.println(ans);
    }
}