Help in Gym problem Coprimes

Revision en1, by hell_hacker, 2018-12-22 01:08:37

In this problem Coprimes I saw some solutions using mobius function. Can anyone throw some light on how mobius function can be used in this problem. Thank you!

Tags help, codeforces::gym, mobius function

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en1 English hell_hacker 2018-12-22 01:08:37 234 Initial revision (published)