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Problem DescriptionWe give the following inductive definition of a “regular brackets” sequence:the empty sequence is a regular brackets sequence, if s is a regular brackets sequence, then (s) an...

Problem DescriptionThe multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card out of the row and scores the number of ...

Problem DescriptionGappu has a very busy weekend ahead of him. Because, next weekend is Halloween, and he is planning to attend as many parties as he can. Since it's Halloween, these parties are al...