e-olymp
Competitions

PP1 Week 3 Contest 1

Integer

One real number n is given. Print Ok, if n is integer and No otherwise.

Input

One real number n.

Output

Print Ok, if n is integer and No otherwise.

Time limit 1 second
Memory limit 128 MiB
Input example #1
7.000
Output example #1
Ok
Input example #2
-21.121
Output example #2
No
Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"