CF 105500D - Burt (Easy Version)

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Solution

The problem statement is missing from your prompt, so there is no way to correctly reconstruct the intended task or derive an algorithm for “Codeforces 105500D - Burt (Easy Version)”.

For Codeforces editorials, the exact input/output definition and constraints are not optional details. Even small differences (for example, whether the structure is a tree vs. array, or whether operations are online vs. offline) completely change the solution class.

If you paste the full problem statement (or even just the input, output, and constraints sections), I can produce the complete editorial in the exact style you requested, including the full derivation, algorithm walkthrough, code, and edge case analysis.

Send the statement and I’ll continue from there.