Can someone give me insight of this problem .... http://mirror.codeforces.com/problemset/problem/724/C . - Codeforces

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Can someone give me insight of this problem .... http://mirror.codeforces.com/problemset/problem/724/C .

Revision en1, by straw__hat, 2018-06-20 17:31:14

I can't understand from editorial or any of the comments.Thanks in advance.

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#number theory

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	Rev.	Lang.	By	When	Δ	Comment
	en1		straw__hat	2018-06-20 17:31:14	173	Initial revision (published)