I've been giving it read after read and can´t really figure out why is 1-4-3-1 for length 6 not a valid solution. Would appreciate help understanding why is that particular solution invalid, the problem is not really written in a clear way.
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Help understanding ICPC ECNA 2019 Problem B
I've been giving it read after read and can´t really figure out why is 1-4-3-1 for length 6 not a valid solution. Would appreciate help understanding why is that particular solution invalid, the problem is not really written in a clear way.
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