摘要： Being an ACMer requires knowledge in many fields, because problems in this contest may use physics, biology, and even musicology as background. And no 阅读全文

摘要： A stack is a data structure in which all insertions and deletions of entries are made at one end, called the "top" of the stack. The last entry which 阅读全文

摘要： Mr. Chopsticks is interested in random phenomena, and he conducts an experiment to study randomness. In the experiment, he throws n balls into m boxes 阅读全文