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bolt
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Problems

Integer

Integer

Time limit 1 second
Memory limit 128 MiB

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

Input data

One real number n.

Output data

Print "Ok", if n is integer and "No" otherwise.

Examples

Input example #1
7.000
Output example #1
Ok
Input example #2
-21.121
Output example #2
No
Author Matviychuk Sergiy
Source "ABC programming"