摘要：题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4283 ------------------------------------------------------------------------------------- 这题由于是区域赛的题目 阅读全文

摘要：题目链接: http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=27130 ------------------------------------------------------------------------------ 阅读全文

摘要：题目链接: http://codeforces.com/problemset/problem/593/D ------------------------------------------------------------------------------------------------- 阅读全文