CF 106487E - Camino a la OIE

I can write the editorial, but I need the actual problem statement first. I could only verify that Codeforces Gym 106487E is “Camino a la OIE” from the contest archive, but the statement text and constraints are not available in the indexed pages I can access.

CF 106487E - Camino a la OIE

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Solve time: 27s
Verified: no

Solution

I can write the editorial, but I need the actual problem statement first. I could only verify that Codeforces Gym 106487E is “Camino a la OIE” from the contest archive, but the statement text and constraints are not available in the indexed pages I can access.

Please paste the Problem Statement / Input / Output (or the full problem text), and I’ll produce the complete editorial in exactly the requested format, including the algorithm explanation, proof, Python solution, traces, tests, and edge cases.