Hogwarts Email Address | Editorial by aksingh007

If the length of the input is less than 5, the email is not valid. If the length is at least 5, check if the first five characters are lower case english 
 letters and check if the rest of the string is "@hogwarts.com".
```
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

static String isValid(String email) {
       // int i=0;
        if(email.length()!=18)
            return "No";
        String str[]=email.split("@");
      
        if(str[0].length()!=5)
            return "No";
        if(!str[1].equals("hogwarts.com"))
           return "No";
        for(int i=0;i<str[0].length();i++)
            if(!(str[0].charAt(i)<='z' && str[0].charAt(i)>='a'))
                return "No";
        return "Yes";
            
    }

public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        String result = isValid(s);
        System.out.println(result);
        in.close();
    }
}

```

Hogwarts Email Address | Editorial by aksingh007

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