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.*;
public class Main {
  public static void main(String args[]) {
  	Scanner sc = new Scanner(System.in);
    int x = sc.nextInt();
    if(x >= 30) {
    	System.out.println("Yes");
    }
    else {
    	System.out.println("No");
    }
  }
}
