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摘要： E. Count The Blocks time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You wrote down all i 阅读全文

摘要： Petya has a rectangular Board of size n×mn×m . Initially, kk chips are placed on the board, ii -th chip is located in the cell at the intersection of 阅读全文

摘要： The King of Berland Polycarp LXXXIV has nn daughters. To establish his power to the neighbouring kingdoms he wants to marry his daughters to the princ 阅读全文

摘要： You are given two integers nn and kk. Your task is to find if nn can be represented as a sum of kk distinct positive odd (not divisible by 22) integer 阅读全文

摘要： 题目描述 在大学里每个学生，为了达到一定的学分，必须从很多课程里选择一些课程来学习，在课程里有些课程必须在某些课程之前学习，如高等数学总是在其它课程之前学习。现在有 NNN 门功课，每门课有个学分，每门课有一门或没有直接先修课（若课程a是课程b的先修课即只有学完了课程a，才能学习课程b）。一个学生要 阅读全文

摘要： 题目背景 随着新版百度空间的上线，Blog 宠物绿豆蛙完成了它的使命，去寻找它新的归宿。 题目描述 给出张 nnn 个点 mmm 条边的有向无环图，起点为 111，终点为 nnn，每条边都有一个长度，并且从起点出发能够到达所有的点，所有的点也都能够到达终点。 绿豆蛙从起点出发，走向终点。 到达每一个 阅读全文

摘要： Problem Statement There is a cave consisting of NN rooms and MM one-directional passages. The rooms are numbered 11 through NN . Takahashi is now in R 阅读全文

摘要： Problem Statement Takahashi will take part in an eating contest. Teams of NN members will compete in this contest, and Takahashi's team consists of NN 阅读全文

摘要： 题目描述 某大学有 nnn 个职员，编号为 1…n1\ldots n1…n。 他们之间有从属关系，也就是说他们的关系就像一棵以校长为根的树，父结点就是子结点的直接上司。 现在有个周年庆宴会，宴会每邀请来一个职员都会增加一定的快乐指数 rir_iri​，但是呢，如果某个职员的直接上司来参加舞会了，那么 阅读全文

摘要： There are two strings A and B with equal length. Both strings are made up of lower case letters. Now you have a powerful string painter. With the help 阅读全文