i need help please !!

Revision en2, by adorable__26, 2021-09-22 20:27:11

i have been stuck in this problem for 3 hours , can anyone solve it ? https://codeforces.com/contestInvitation/d77940d81af688faec2c767db7115bb22250532d

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  Rev. Lang. By When Δ Comment
en2 English adorable__26 2021-09-22 20:27:11 68
en1 English adorable__26 2021-09-22 20:15:59 137 Initial revision (published)