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The 2018 World Cup was held recently in Russia. Some great soccer countries (e.g., Italy,Netherlands, Chile, USA) did not qualify for this World Cup. 阅读全文
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A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of poker c 阅读全文
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The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room 阅读全文
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Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only the digits 0 and 1. You m 阅读全文
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Farmer John knows that an intellectually satisfied cow is a happy cow who will give more milk. He has arranged a brainy activity for cows in which the 阅读全文
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Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a numb 阅读全文
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You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock. 阅读全文
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在一个给定形状的棋盘（形状可能是不规则的）上面摆放棋子，棋子没有区别。要求摆放时任意的两个棋子不能放在棋盘中的同一行或者同一列，请编程求解对于给定形状和大小的棋盘，摆放k个棋子的所有可行的摆放方案C。 Input 输入含有多组测试数据。每组数据的第一行是两个正整数，n k，用一个空格隔在一个n*n的 阅读全文
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前有牛顿瘟疫“家里蹲”发明微积分。 现有 Cuber QQ 新冠肺炎“家里蹲”发明与矩阵。 与矩阵是一个 n×n 的矩阵。规定矩阵中的第 i 行第 j 列记为 (i,j) 。 生成一个与矩阵的方式是，先生成一个长度为 n 的数列 a1,a2,…,an−1,an ，而矩阵中 (i,j)=ai&aj 。 阅读全文
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Cuber QQ 在疫情期间已经宅在家两个月了。 实在是无所事事的他，决定重操旧业，继续实现他曾经梦寐的钢琴演奏家梦想。 掀开积满了灰尘的钢琴盖，是他许久都未触碰的琴键，按下的瞬间，他发现，钢琴坏了。 Cuber QQ 有一个多年的弹奏习惯，他弹奏钢琴，同一时刻一定会同时按下 m 个琴键，他喜欢不同 阅读全文