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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