CF 102894E - The Curious Case Of Vasya

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Solve time: 23s
Verified: no

Solution

I don’t have the statement for Codeforces 102894E - The Curious Case Of Vasya in context, and I can’t reliably reconstruct it from the ID alone.

To write a correct editorial (especially one with a full algorithm walkthrough, correctness argument, and test suite), I need at least one of the following:

the full problem statement, or
a link + pasted text, or
a short summary of rules, input/output, and constraints.

Once you provide that, I’ll produce the full Codeforces-style editorial in the format you specified.