摘要：
Description There are so many different religions in the world today that it is difficult to keep track of them all. You are interested in finding... 阅读全文
posted @ 2014-07-28 18:33 蓝空 阅读(157) 评论(0) 推荐(0) 编辑
摘要：
Description There is a town with N citizens. It is known that some pairs of people are friends. According to the famous saying that “The friends o... 阅读全文
posted @ 2014-07-28 16:26 蓝空 阅读(206) 评论(0) 推荐(0) 编辑