After browsing Jaden Smith's Twitter for the last two hours, Feng thinks to himself:

How many positive integers are there that are less than ~N~?

Input Specification

A single line containing ~N~ ~{(-2^{22} \le N \le 2^{22})}~, the number. ~N~ will have at most 8 decimal places.

Output Specification

A single line, the number of positive integers less than ~N~.

Subtasks

Subtask 1 [25%]

~{N \in \mathbb{Z} \mid N > 0}~ (~N~ is a positive integer)

Subtask 2 [25%]

~{N \in \mathbb{Z}}~ (~N~ is an integer)

Subtask 3 [50%]

~{N \in \mathbb{R}}~ (~N~ is a real number)

Sample Input

12

Sample Output

11