CF 104003I - William and Array
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CF 104003I - William and Array
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Solution
The problem statement is missing from your prompt (the sections for Problem Statement / Input / Output are empty). I can’t reliably reconstruct Codeforces 104003I “William and Array” from just the title, and writing a full editorial without the exact rules would almost certainly introduce incorrect assumptions.
If you paste the full statement (or even a screenshot / raw text), I’ll produce the complete editorial in the exact format you requested, including derivation, walkthrough, proof sketch, Python solution, and edge-case analysis.
Send the statement and I’ll continue from there.