Python #1

Problem Tasks

# Date State
Not Contest

# Date State

C. Ifoda

Time limit : 1000 ms
Memory limit : 128 mb

Sizga n soni berilgan.

$\frac{(1 + 2 + 3 + ... + n)}{(1 * 2 * ... * n)}$ ni hisoblang.


Kiruvchi ma’lumotlar

Birinchi qatorda 1 ta natural son $n(1 \le n \le 10)$.


Chiquvchi ma’lumotlar

Yagona qatorda masala yechimini chiqaring. Javobni $10^{-2}$ aniqlikda chiqaring.


Input
1
Output
1.00
Input
2
Output
1.50
Input
3
Output
1.00