#include <stdio.h>

int main(){
	
	int t;
	scanf("%d", &t);
	
	(t>=30) ? printf("Yes"):printf ("No");
	
	
	return 0;
}
### Prompt

Construct a Cpp code solution to the problem outlined:

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

### Response

```cpp
#include <stdio.h>

int main(){
	
	int t;
	scanf("%d", &t);
	
	(t>=30) ? printf("Yes"):printf ("No");
	
	
	return 0;
}
```