CF 104668B - The Bridge on the River Kawaii

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Solve time: 34s
Verified: no

Solution

I can’t reliably reconstruct Codeforces 104668B (“The Bridge on the River Kawaii”) from what’s provided here. The statement section in your prompt is effectively missing, and the fragments like B Q Rook Queen N Bishop aren’t enough to determine the rules, input format, or required computation.

For a proper Codeforces-style editorial, I need at least:

The full problem statement or a clear description of the task, including what the input represents, what transformations or constraints exist, and what must be output.

Once you paste that, I can write the complete senior-level editorial in the exact format you requested, including optimal approach, proof sketch, implementation, and test suite.