Help in a combinatorics problem : 869C — The Intriguing Obsession

Правка en1, от saurabhs1206, 2019-12-13 20:40:17

I tried to understand the solutions of few people but couldn't exactly get it. Besides, couldn't find the editorial for the problem. It'd be really great if someone could help me out. Problem Link


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en1 Английский saurabhs1206 2019-12-13 20:40:17 313 Initial revision (published)