Editorial for Another Contest 4 Problem 9 - Fast Fourier Transform!
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
The function to implement is a vector of the first factorials, modulo
, as motivated by the problem statement and problem title.
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