I am using an online compiler to run this simple code but its giving a runtime error, "could not find or load class Main" There is no other syntax error. Kindly suggest a solution.
import java.io.*;
class weird
{
    void main ()throws IOException
    {
        BufferedReader br=new BufferedReader (new InputStreamReader(System.in));
        int n;
        System.out.println("Enter a number");
        n=Integer.parseInt(br.readLine());
        if (n>=1 && n<=100);
        {
            if(n%2!=0);
            System.out.println("Weird");
            if(n%2==0);
            {
                if(n<=5&&n>=2)
                System.out.println("Not Weird");
                else if(n<=20&&n>=6)
                System.out.println("Weird");
                else if(n>20)
                System.out.println("Not Weird");
            }
        }
    }
}
 
    