2017年10月16日
hdu 6191--Query on A Tree（持久化字典树）
摘要： 题目链接 Problem Description Monkey A lives on a tree, he always plays on this tree.One day, monkey A learned about one of the bit-operations, xor. He was 阅读全文
posted @ 2017-10-16 16:45 茶飘香~ 阅读(331) 评论(0) 推荐(0) 编辑