摘要:
Gappu 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 Hal 阅读全文
摘要:
Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card 阅读全文
摘要:
Description We give the following inductive definition of a “regular brackets” sequence: the empty sequence is a regular brackets sequence, if s is a 阅读全文