CF 103457E - Secure Prison

I can’t reliably write a correct editorial for “Codeforces 103457E - Secure Prison” because the problem statement is missing from your prompt.

CF 103457E - Secure Prison

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Solve time: 30s
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Solution

I can’t reliably write a correct editorial for “Codeforces 103457E - Secure Prison” because the problem statement is missing from your prompt.

Right now there’s no description of:

what the input contains,

what needs to be computed,

or any constraints that would determine the algorithmic approach.

If I tried to proceed anyway, I’d have to guess the problem, which would produce a fake editorial rather than a useful one.

Paste the full problem statement (or even a screenshot/text dump), and I’ll produce a complete Codeforces-style editorial in the exact format you requested, including the reasoning, optimal solution derivation, code, and test cases.