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Contest: Task: Related: TaskB

Score : $100$ points

Problem Statement

You will turn on the air conditioner if, and only if, the temperature of the room is $30$ degrees Celsius or above.

The current temperature of the room is $X$ degrees Celsius. Will you turn on the air conditioner?

Constraints

  • $-40 \leq X \leq 40$
  • $X$ is an integer.

Input

Input is given from Standard Input in the following format:

$X$

Output

Print Yes if you will turn on the air conditioner; print No otherwise.

Sample Input 1

25

Sample Output 1

No

Sample Input 2

30

Sample Output 2

Yes