2018年4月30日
D:Sequence Swapping
摘要： BaoBao has just found a strange sequence {<, >, <, >, , <, >} of length in his pocket. As you can see, each element <, > in the sequence is an ordered 阅读全文
posted @ 2018-04-30 13:18 Billyshuai 阅读(1096) 评论(0) 推荐(0) 编辑