NTT (fast number theory transformation)

Copyright: Konjac not easy to write articles, you want to reprint big brother to tell me, QAQ https://blog.csdn.net/qq_38944163/article/details/89194764

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Pre-knowledge

France and France kick (fft)

If you do not understand the FFT can first look

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FFT shortcomings

1, involves complex numbers (Double), so slow runner
2, to use $\pi$ , accuracy will be errors
3, ...... anyway, there it wants

NTT post cards often

After the card is often FFT

This is the gap

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NTT role

First wave of nonsense