A. Arpa’s hard exam and Mehrdad’s naive cheat time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There exists an island called Arpa’s land, some beautiful girls live there, as ugly ones do. Me…
Description User ainta has a permutation p1, p2, ..., pn. As the New Year is coming, he wants to make his permutation as pretty as possible. Permutation a1, a2, ..., an is prettier than permutation b1, b2, ..., bn, if and only if there exists an inte…
A Bug's Life Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9204 Accepted Submission(s): 2961 Problem Description Background Professor Hopper is researching the sexual behavior of a rare sp…
Musical Theme Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 27539 Accepted: 9290 Description A musical melody is represented as a sequence of N (1<=N<=20000)notes that are integers in the range 1..88, each representing a key on the…
题目大意: 一共有p1+p2个人,分成两组,一组p1,一组p2.给出N个条件,格式如下: x y yes表示x和y分到同一组,即同是好人或者同是坏人. x y no表示x和y分到不同组,一个为好人,一个为坏人 这个可以自己分析一下, 很简单. 问分组情况是否唯一,若唯一则输出p1的成员,否则输出no.保证不存在矛盾条件,但是有可能出现x=y的情况. 思路: 参考链接:http://www.cnblogs.com/kuangbin/archive/2013/04/06/3002498.html 用…
这个题做了两天了.首先用并查集分类是明白的, 不过判断是否情况唯一刚开始用的是搜索.总是超时. 后来看别人的结题报告, 才恍然大悟判断唯一得用DP. 题目大意: 一共有p1+p2个人,分成两组,一组p1个,一组p2个.给出N个条件,格式如下: x y yes表示x和y分到同一组 x y no表示x和y分到不同组 问分组情况是否唯一,若唯一则按从小到大顺序输出,否则输出no.保证不存在矛盾条件,但是有可能出现x=y的情况. 题目分析: 题中会给我们一些信息, 告诉我们那些是同一类, 哪些是不同类.…
Description A programming coach has n students to teach. We know that n is divisible by 3. Let's assume that all students are numbered from 1 to n, inclusive. Before the university programming championship the coach wants to split all students into g…