import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
        int n=5;
        int count=0;
        for(int i=1;i*i<=n;i++){
            if(n%i==0){
                count++;
                if(i!=n/i){
                    count++;
                }
            }
        }
    }
}