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.

Examples

Input

25


Output

No


Input

30


Output

Yes
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            int X = sc.nextInt();
            System.out.println(X >= 30 ? "Yes" : "No");
        }
    }
}
