Tsarist_Russia's blog

the Mobius function
By Tsarist_Russia, history, 5 years ago, In English

hello codeforces. some days ago i meet great problem — 1285F - Classical?. in this task we need to use the Mobius function. so. for me it was something new and interesting. could u give me some task, were i can also use that trick?

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5 years ago, # |
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Coprime Subsequences, Coprime triples, Coprime 6-tuples(Subtask 1)

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