Problem F from CERC 15

Правка en1, от SureYeaah, 2017-12-18 17:39:34

I was trying to solve problem F from CERC 15. The problem was basically reduced to finding the sum . How can I find this sum in better than quadratic time without FFT?

Теги cumulative sum, generating function, cerc

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
en1 Английский SureYeaah 2017-12-18 17:39:34 278 Initial revision (published)