2015年6月6日
Codeforces Round #306 (Div. 2)
摘要： A. Two SubstringsYou are given strings. Your task is to determine if the given stringscontains two non-overlapping substrings "AB" and "BA" (the subst... 阅读全文
posted @ 2015-06-06 11:02 哈特13 阅读(599) 评论(1) 推荐(0)