题目描述
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-----
25
-----Sample Output-----
No
输入格式
见题面
输出格式
见题面
样例输入
25
样例输出
No