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

Правка en1, от straw__hat, 2018-06-20 17:31:14

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

Теги #number theory

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en1 Английский straw__hat 2018-06-20 17:31:14 173 Initial revision (published)