Problem Description 度熊面前有一个全是由1构成的字符串，被称为全1序列。你可以合并任意相邻的两个1，从而形成一个新的序列。对于给定的一个全1序列，请计算根据以上方法，可以构成多少种不同的序列。...

Problem Description In most languages, text is written from left to right. However, there are other languages where text is read and written from right to lef...

Problem Description Ignatius likes to write words in reverse way. Given a single line of text which is written by Ignatius, you should reverse all the words a...

Problem Description Hogwarts正式开学以后,Harry发现在Hogwarts里,某些楼梯并不是静止不动的，相反,他们每隔一分钟就变动一次方向. 比如下面的例子里,一开始楼梯在竖直方向,一分钟以后它移动到了水平方向,再过一分...

Problem Description A simple mathematical formula for e is

Problem Description 有N个比赛队（1<=N<=500），编号依次为1，2，3，。。。。，N进行比赛，比赛结束后，裁判委员会要将所有参赛队伍从前往后依次排名，但现在裁判委员会不能直接获得每个队的比赛成绩，只知道每场比赛的结果，即P1赢P2，用P1，P...

Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1, 2, …, n into each circle separately, and the sum of numbers in t...

Problem Description Giving the N, can you tell me the answer of F(N)?Input Each test case c

Problem Description HDU ACM集训队的队员在暑假集训时经常要讨论自己在做题中遇到的问题.每当面临自己解决不了的问题时,他们就会围坐在一张圆形的桌子旁进行交流,经过大家的讨论...

Problem Description 给你两个集合，要求{A} + {B}. 注:同一个集合中不会有两个相同的元素.