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Description Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital 阅读全文
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Description 某部队进行新兵队列训练，将新兵从一开始按顺序依次编号，并排成一行横队，训练的规则如下：从头开始一至二报数，凡报到二的出列，剩下的向小序号方向靠拢，再从头开始进行一至三报数，凡报到三的出列，剩下的向小序号方向靠拢，继续从头开始进行一至二报数。。。，以后从头开始轮流进行一至二报数 阅读全文
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Description You are given a string consisting of parentheses () and []. A string of this type is said to be correct: (a)if it is the empty string(b)if 阅读全文
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Description The only printer in the computer science students' union is experiencing an extremely heavy workload. Sometimes there are a hundred jobs i 阅读全文