56. Purchase Discount Calculator

Difficulty: easy · Math

Problem

A shop gives a discount based on the purchase amount: | Amount | Discount | |---|---| | less than 1000 | 5% | | 1000 up to (but not including) 5000 | 10% | | 5000 or more | 15% | The final amount is `amount - amount * discount`. Print it rounded to 2 decimal places (exact halves round up).

Input

A single line containing the purchase amount, a non-negative number with at most 2 digits after the decimal point.

Output

Print the final amount with exactly two digits after the decimal point.

Example 1

Input:
800
Output:
760.00

Explanation: Below 1000 the discount is 5%: 800 - 40 = 760.00.

Example 2

Input:
3000
Output:
2700.00

Explanation: Between 1000 and 5000 the discount is 10%: 3000 - 300 = 2700.00.

Example 3

Input:
6000
Output:
5100.00

Explanation: At 5000 or more the discount is 15%: 6000 - 900 = 5100.00.

Constraints

- 0 <= amount <= 10^7

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