摘要：
Problem DescriptionAn IPv6-address is a 128-bit number. For convenience, this number is recorded in blocks of 16 bits in hexadecimal record, the block... 阅读全文
摘要：
Problem DescriptionLillian is a clever girl so that she has lots of fans and often receives gifts from her fans.One day Lillian gets some segments fro... 阅读全文
摘要：
Problem Descriptionsoda has a setSwithnintegers{1,2,…,n}. A set is called key set if the sum of integers in the set is an even number. He wants to kno... 阅读全文
摘要：
Problem DescriptionAs we know, Rikka is poor at math. Yuta is worrying about this situation, so he asks rikka to have some practice on codeforces. The... 阅读全文
摘要：
Problem Description很多学校流行一种比较的习惯。老师们很喜欢询问，从某某到某某当中，分数最高的是多少。这让很多学生很反感。不管你喜不喜欢，现在需要你做的是，就是按照老师的要求，写一个程序，模拟老师的询问。当然，老师有时候需要更新某位同学的成绩。Input本题目包含多组测试，请处理到... 阅读全文
摘要：
Problem DescriptionRecently Rikka falls in love with an old but interesting game -- 24 points. She wants to becomea master of this game, so she asks Y... 阅读全文