View Code of Problem 18

import java.util.Scanner;

public class Main18 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        while (scanner.hasNext()){
            int n=Integer.parseInt(scanner.nextLine());
            int m=n/2;
            int sum=((m-1)*m)/2;
            if(n%2!=0)
            {
                sum+=sum+m;
            } else {
                sum+=sum;
            }
            System.out.println(sum);
        }
    }
}

/*
Main.java:3: error: class Main18 is public, should be declared in a file named Main18.java
public class Main18 {
       ^
1 error
*/