CF 105813J - Another Expected Value Problem

The problem statement is missing from your prompt, and for a Codeforces expected value problem the exact rules matter down to the last probability detail. Please paste the full statement (or at least the rules, constraints, and what is being expected over).

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CF 105813J - Another Expected Value Problem

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Solution

The problem statement is missing from your prompt, and for a Codeforces expected value problem the exact rules matter down to the last probability detail.

Please paste the full statement (or at least the rules, constraints, and what is being expected over). Once I have that, I’ll write the complete editorial in the format you specified, including derivation, optimal solution, walkthrough, and code.