CF 103109I - Immortality Potion

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Solve time: 31s
Verified: no

Solution

I can’t write a correct Codeforces editorial for “103109I - Immortality Potion” because the actual problem statement is missing from your prompt.

Right now I don’t have:

what the input represents
what transformation or decision the problem asks for
constraints (which define the algorithmic approach)
sample inputs/outputs

Without those, any “full editorial” would be guesswork and would very likely be wrong or misleading.

If you paste the full statement (or even just the input/output description plus constraints and samples), I’ll immediately produce the complete editorial in the exact style you requested, including:

a clean re-derivation, optimal solution reasoning, walkthrough, code, complexity, and edge-case analysis.

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