2017年8月31日
2017广西邀请赛 Query on A Tree （可持续化字典树）
摘要： Query on A Tree 题目描述 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 kee 阅读全文
posted @ 2017-08-31 11:10 贱人方 阅读(269) 评论(0) 推荐(0) 编辑