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Link to the question: Luogu, AtCoder Preface The very first generating function and polynomial problem solved in my life! This blog is a detailed expl 阅读全文
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CF blog entry Solved the first five questions with brute force. Still 19 points away from reclaiming purple. Hang on! Solution: CF1774G Segment Coveri 阅读全文
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Solution: CF731D 80-th Level Archeology -- Letter, Interval, and Reverse Thinking Link to the question: CF Luogu Preface Assertion: "STL set is the mo 阅读全文
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Blog entry at CF First CF round at Cambridge. Solved A,B,D1 in the round. Dropped from purple to blue... Still a long way to go... Solution: CF Round 阅读全文
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###Intro: This blog will start with plain multiplication, go through Divide-and-conquer multiplication, and reach FFT and NTT. The aim is to enable th 阅读全文