摘要: 题目描述 There is an integer sequence a of length n and there are two kinds of operations:0 l r: select some numbers from al...ar so that their xor sum is 阅读全文
posted @ 2019-07-23 21:46 特特w 阅读(346) 评论(0) 推荐(0) 编辑
摘要: 题目描述 After returning with honour from ICPC(International Cat Programming Contest) World Finals, Tom decides to say goodbye to ICPC and start a new per 阅读全文
posted @ 2019-07-23 13:57 特特w 阅读(312) 评论(0) 推荐(0) 编辑