#include<stdio.h>

int main()
{
	int n;
	
	scanf("%d", &n);
	
	if(n >= 30){
		printf("Yes\n");
	}else{
		printf("No\n");
	}
}
### Prompt

Please formulate a cpp solution to the following problem:

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 n;
	
	scanf("%d", &n);
	
	if(n >= 30){
		printf("Yes\n");
	}else{
		printf("No\n");
	}
}
```