Description

Yas Supermarket sells batteries, with each battery priced at 2.5 yuan. If the quantity reaches 10 or more, a 20% discount is applied. Write a program that takes the number of batteries as input and outputs the total cost (rounded to 2 decimal places).

Input Format

One line: an integer representing the number of batteries.

Output Format

One line: a floating-point number representing the total cost to purchase the batteries, rounded to 2 decimal places.

15

30.00

代码在线