CF 106260D - four

I can write the editorial, but I need the actual problem details first. The statement section in your prompt is empty, and I could not reliably identify the problem from only “Codeforces 106260D - four”.

codeforcescompetitive-programming

CF 106260D - four

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Solution

I can write the editorial, but I need the actual problem details first. The statement section in your prompt is empty, and I could not reliably identify the problem from only “Codeforces 106260D - four”. There are multiple Codeforces Gym/problem IDs with similar numbering, and guessing would likely produce a completely wrong editorial and solution.

Please paste the full problem statement (or provide the input/output description and examples), and I’ll write the complete editorial in the exact format and style you requested.