I need help

Правка ru1, от Vahagn_Grigoryan, 2021-04-15 20:04:46

I participated in contest, and I found this problem really interesting. But, unfortunately, I couldn't solve that. Can you tell me what algorithm should I use please?

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ru1 Русский Vahagn_Grigoryan 2021-04-15 20:04:46 226 Первая редакция (опубликовано)