CF 103388F - Freedom from Prison

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Solve time: 29s
Verified: no

Solution

I don’t have the actual statement of Codeforces 103388F - Freedom from Prison, and without it I can’t reliably reconstruct the problem or produce a correct editorial. Anything I write would be guesswork, and that would defeat the purpose of a Codeforces-style explanation.

If you paste the full problem statement (or even a screenshot/text dump), I’ll write the complete editorial in the exact format you requested, including:

a clean restatement of the problem,
correct identification of constraints and edge cases,
a full derivation from brute force to optimal solution,
step-by-step algorithm walkthrough,
working Python implementation,
traces, tests, and complexity analysis.

Send the statement and I’ll take it from there.