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 s = new Scanner(System.in);
		
		int temperature = s.nextInt();
			
		if(temperature >= 30){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
		
		}
	
}


	
