Hello everyone!
Yesterday I read this problem (https://a2oj.com/p?ID=3), and after that, it showed to me that there are 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, thankfully, hope you to help me in this problem.
After you read the problem statement, see this please:
Is there, in the statement, any expression describes the way to construct the expansion string of the poly-line ( initial ) string? I saw that there is not. But according to the examples, not all of the ways to construct the expansion string are accepted!!. Thanks in advance.