import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int sum = 0; sum 0 if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1; n == m n m sum += n + m sum n + m n m if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1; n > m n m sum += n*2 -1 sum n*2 -1 n*2 n 2 1 sum += m*2 -1 sum m*2 -1 m*2 m 2 1 System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    }
} Main
import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int m = sc.nextInt();
        int sum = 0;
        
        if(n == m)
            sum += n + m;
        else if(n > m)
            sum += n*2 -1;
        else
            sum += m*2 -1;
        
        System.out.println(sum);
    }
}
