Of course there's a Fast Fourier Transform problem in this contest! There may be number theory involved!

`vector<int> f(int n)`

You may assume - though in practice there is only one test case, so maybe you can guess the value of beforehand!

Of course there's a Fast Fourier Transform problem in this contest! There may be number theory involved!

`vector<int> f(int n)`

You may assume - though in practice there is only one test case, so maybe you can guess the value of beforehand!

## Comments