CF 106309D - Тройки на доске
I can write the full editorial, but I need the actual problem statement details first. The prompt only includes the Codeforces title/ID and empty sections for statement/input/output, and I do not have enough information to reconstruct the problem reliably.
CF 106309D - \u0422\u0440\u043e\u0439\u043a\u0438 \u043d\u0430 \u0434\u043e\u0441\u043a\u0435
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Solve time: 22s
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Solution
I can write the full editorial, but I need the actual problem statement details first. The prompt only includes the Codeforces title/ID and empty sections for statement/input/output, and I do not have enough information to reconstruct the problem reliably.
Please paste the problem statement (including constraints and examples), and I’ll produce the complete editorial in the exact format and style you requested.