2014年8月1日
HDU 4906 Our happy ending
摘要： 题意： Given a sequence a_1,a_2,...,a_n, if we can take some of them(each a_i can only be used once), and they sum to k, then we say this sequence is a ... 阅读全文
posted @ 2014-08-01 15:46 Phantom01 阅读(493) 评论(0) 推荐(0)