Team Contests - Warmup A 题意:... 思路:不会 代码:... 随机 B 题意:给n个点,问是否有一个圆上有最少n/3个点 思路:随机大法好. 代码:... 递推 C 题意:对自然数列{1,2,3,4,5,6...}进行n次操作,每次操作有一个x,意思是前x个保留,后x个删去,再x个保留,后x个删去...形成新的序列,问n次操作后第n个数字. 思路:(bh)我开始想二分答案,但是对于n次过程中就被删去的点就无法处理了.那么倒过来做就很方便,已知最后的位置是第n个,那么在…

2016暑假多校联合---Rikka with Sequence (线段树) Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Yuta has an array A with n numbers. Then he make…

2016暑假多校联合---Windows 10(HDU:5802) Problem Description Long long ago, there was an old monk living on the top of a mountain. Recently, our old monk found the operating system of his computer was updating to windows 10 automatically and he even can't j…

2016暑假多校联合---Substring Problem Description ?? is practicing his program skill, and now he is given a string, he has to calculate the total number of its distinct substrings. But ?? thinks that is too easy, he wants to make this problem more interesti…

2016暑假多校联合---To My Girlfriend Problem Description Dear Guo I never forget the moment I met with you.You carefully asked me: "I have a very difficult problem. Can you teach me?".I replied with a smile, "of course"."I have n items,…

2016暑假多校联合---A Simple Chess   Problem Description There is a n×m board, a chess want to go to the position (n,m) from the position (1,1).The chess is able to go to position (x2,y2) from the position (x1,y1), only and if only x1,y1,x2,y2 is satisfied…

2016暑假多校联合---Another Meaning Problem Description As is known to all, in many cases, a word has two meanings. Such as “hehe”, which not only means “hehe”, but also means “excuse me”. Today, ?? is chating with MeiZi online, MeiZi sends a sentence A to…

我要举报本次校赛出题人的消极出题!!! 官方题解请戳:http://3.scnuacm2015.sinaapp.com/?p=89(其实就是一堆代码没有题解) A. 树链剖分数据结构板题 题目大意:我没看,看不懂. 基本思路:我不会. 参考代码:找Oyk老师和Czj老师去. B. The background of water problem 题目大意(大写加粗的水题):给定$N$个学生和他们$K$个科目的成绩$S_i$,再给出各科目$K_i$的权重顺序$Q_i$,求排名之后,拥有id为$X$的…

原题链接 Problem Description You may heard of the Joseph Problem, the story comes from a Jewish historian living in 1st century. He and his 40 comrade soldiers were trapped in a cave, the exit of which was blocked by Romans. They chose suicide over captu…

原题链接 Problem Description Given some segments which are paralleled to the coordinate axis. You need to count the number of their intersection. The input data guarantee that no two segments share the same endpoint, no covered segments, and no segments…