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