Where is the mistake? (problem D)

Revision en1, by Utsa2000, 2021-05-05 22:11:33

Someone hacked my solution of problem D. Now it says WA. But I can't find any mistake. Please help me to find the mistake. My submission: https://codeforces.com/contest/1520/submission/115269582

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en1 English Utsa2000 2021-05-05 22:11:33 227 Initial revision (published)