CF 105615J - 叶的距离

I can’t produce a correct editorial for this yet because the actual problem content is missing. Right now I only see the title “叶的距离” (Leaf Distance), but there is no statement describing the tree structure, input format, or what “distance” is being asked.

codeforcescompetitive-programming

CF 105615J - \u53f6\u7684\u8ddd\u79bb

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Solve time: 27s
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Solution

I can’t produce a correct editorial for this yet because the actual problem content is missing.

Right now I only see the title “叶的距离” (Leaf Distance), but there is no statement describing the tree structure, input format, or what “distance” is being asked. For Codeforces problems, that missing detail completely determines the solution technique, and guessing would risk fabricating the entire algorithm.

Please paste the full problem statement (or even a screenshot/text dump). Once you do, I’ll write the full editorial in the exact style you requested, including a proper derivation, edge cases, and a complete implementation.