CF 104716B1 - Goose, Goose, Ducks? B1

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Solve time: 31s
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Solution

I don’t have the actual statement for Codeforces 104716B1 - Goose, Goose, Ducks? B1 in your prompt, so I can’t safely write a correct editorial without risking inventing the problem details.

If you paste the full problem statement (or even just input/output + constraints + a sample), I’ll produce the complete editorial in the exact format you requested, including:

full problem restatement in my own words
brute force → optimized transition
algorithm walkthrough with correctness reasoning
Python solution
worked traces, edge cases, and tests

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