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[]){
    Scanner scanner = new Scanner(System.in);
    int x = scanner.nextInt();  
    if(x>=30){System.out.println("Yes");}else{System.out.println("No");}
  
  
  }
}
