#include <iostream>

int main(){
  int x;
  std::cin>>x;
  if(x>=30)std::cout<<"Yes";
  else std::cout<<"No";
}
### 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 <iostream>

int main(){
  int x;
  std::cin>>x;
  if(x>=30)std::cout<<"Yes";
  else std::cout<<"No";
}
```