Is it incompletely described? Or it is me? [problem from another OJ]

Правка en7, от aboAdnan, 2018-01-01 22:57:09

Hello everyone!

Yesterday I read this problem (https://a2oj.com/p?ID=3), and after that, it showed to me that there is a waste of some information that the solver needs to solve it.

But, surely, several unaccessible accepted submissions, made me incline to accuse my understanding.

So I, gratefully, hope you to help me in this problem.

After you read the problem statement, see this please:

Is there, in the statement, expressions describes the whole way to construct the expansion string from the poly-line ( initial ) string? I saw that there is not enough explanation on it. So, all of the ways are considered true, but according to the examples, not all of the ways to construct the expansion string are accepted!!. Thanks in advance.

Теги help, ambiguous

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  Rev. Язык Кто Когда Δ Комментарий
en8 Английский aboAdnan 2018-01-01 22:59:56 24
en7 Английский aboAdnan 2018-01-01 22:57:09 86
en6 Английский aboAdnan 2017-12-31 19:07:01 5 Tiny change: 'hat there are waste of ' -> 'hat there is a waste of '
en5 Английский aboAdnan 2017-12-31 19:03:20 8 Tiny change: '\n\nSo I, thankfully, hop' -> '\n\nSo I, gratefully, hop'
en4 Английский aboAdnan 2017-12-31 17:46:15 6
en3 Английский aboAdnan 2017-12-31 17:17:19 6
en2 Английский aboAdnan 2017-12-31 17:15:23 2 Tiny change: 'veryone!\nYesterda' -> 'veryone!\n\nYesterda'
en1 Английский aboAdnan 2017-12-31 17:14:20 782 Initial revision (published)