Олимпиадный тренинг

Задача 27045. End row of numbers - 3


Задача

Темы: Цикл for
Given a real number X (X<10). Calculate



Input: the first line contains a single number X

Output: Print the sum of the given series
(In the checking program, the accuracy is set to 3 decimal places)
Запрещенные операторы:factorial;**