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I need help with this problem

Правка en1, от Kanata18, 2024-10-12 06:55:57

Hello Codeforces!!

I saw this problem days ago and I have tried to solve it since then but I have not been successful. Help me please

This is the problem

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  Rev. Язык Кто Когда Δ Комментарий
en2 Английский Kanata18 2024-10-12 06:57:49 0 (published)
en1 Английский Kanata18 2024-10-12 06:55:57 257 Initial revision (saved to drafts)