CF 106169J - Laser Balancing

I can write the editorial in that format, but I need the actual problem statement for Codeforces 106169J - Laser Balancing first.

codeforcescompetitive-programming

CF 106169J - Laser Balancing

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I can write the editorial in that format, but I need the actual problem statement for Codeforces 106169J - Laser Balancing first.

I could not reliably identify the problem details from the problem ID alone, and I do not want to invent the statement, constraints, algorithm, samples, or code for the wrong problem.

Please paste the full statement (including input/output and samples), and I will produce the complete editorial with all requested sections and a Python solution.