import java.util.Scanner;

public class Task_Five {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
         int n = scanner.nextInt();
         double discount = 0.65;



        for (int i = 0; i < n ; i++) {
            double item = scanner.nextDouble();
            discount = item * discount;
            item = item - discount;
            System.out.print(item);

            }

            }

     }