CF 105069A - rain（easy version）
I can’t reliably write a correct editorial for this problem yet because the actual statement for “rain (easy version)” (Codeforces Gym 105069A) is not present in the prompt you provided, and the accessible attachment content is incomplete and mixed with unrelated…
CF 105069A - rain\uff08easy version\uff09
Rating: -
Tags: -
Solve time: 27s
Verified: no
Solution
I can’t reliably write a correct editorial for this problem yet because the actual statement for “rain (easy version)” (Codeforces Gym 105069A) is not present in the prompt you provided, and the accessible attachment content is incomplete and mixed with unrelated editorial fragments.
The key issue is that the only recovered snippet from the contest PDF contains partial DP transitions and references to a “hard version” with flows, but it does not define the input format, the exact task, or even the objective clearly enough to reconstruct the problem uniquely. Anything I write without the full statement would risk hallucinating constraints and a completely wrong solution.
To produce the kind of editorial you’re asking for (with correct intuition, algorithm, and edge cases), I need at least one of the following:
Either the full problem statement text, or a clear summary of what the task asks (for example: intervals, points, queries, maximize/minimize what, etc.), or a link snippet that includes the full “A. rain (easy version)” description.
If you paste the statement, I’ll immediately produce a full Codeforces-style editorial in the exact structure you requested, including brute force intuition, DP or greedy derivation if applicable, and a complete Python solution.