Air Conditioner

Source: AtCoder

Problem Statement

The current room temperature is $X$ degrees Celsius. The air conditioner is turned on if and only if the temperature is at least $30$. Determine whether it is turned on.

Input

One line contains the integer $X$.

Output

Print Yes if $X \ge 30$; otherwise print No.

Subtasks

• Subtask 1 (100%): $-40 \le X \le 40$; $X$ is an integer.

Examples

Example 1

Input

25

Output

No

Explanation

For the sample values 25, evaluating the conditions in the statement gives No. Therefore the program prints the shown output.

Example 2

Input

30

Output

Yes

Explanation

For the sample values 30, evaluating the conditions in the statement gives Yes. Therefore the program prints the shown output.