摘要：
String 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=4681 Description Given 3 strings A, B, C, find the longest string D which satisfy the following 阅读全文
摘要：
Sum Of Gcd 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=4676 Description Given you a sequence of number a1, a2, ..., an, which is a permutation of 阅读全文