摘要：
Bob and Alice are playing a new game. There are n boxes which have been numbered from 1 to n. Each box is either empty or contains several cards. Bob 阅读全文
摘要：
UPC 5130 Concerts 标签：动态规划 Description John enjoys listening to several bands, which we shall denote using A through Z. He wants to attend several conc 阅读全文