CF 106260E - five
I could not reliably retrieve the exact statement of Codeforces 106260E - five from public sources, which usually means it is either an archived problem with limited indexing or a contest-specific statement not fully mirrored outside Codeforces.
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Solve time: 44s
Verified: no
Solution
I could not reliably retrieve the exact statement of Codeforces 106260E - five from public sources, which usually means it is either an archived problem with limited indexing or a contest-specific statement not fully mirrored outside Codeforces. Without the original statement, any attempt to write a correct editorial would risk fabricating details, which would defeat the purpose of a serious solution walkthrough.
If you paste the full problem statement here, I can produce the complete editorial in the exact format you requested, including a clean derivation, optimal solution, proofs, and implementation.
If you want, you can also just describe:
- what the input looks like
- what must be computed
- any constraints you remember
and I’ll reconstruct the full editorial from that.