木子川

摘要： 给你一个n*m的方格图表示一个博物馆的分布图.每个方格上用'*'表示墙,用'.'表示空位.每一个空格和相邻的墙之间都有一幅画.(相邻指的是上下左右相邻).你可以从一个空格的位置走到相邻的空格位置.现在你给你若干个(xi,yi)形式的询问,表示你现在在(xi,yi)这个位置(保证为空位)出发,问你从这 阅读全文

摘要： 幻方是一种很神奇的 N*N 矩阵：它由数字 1,2,3,.....N x N 构成，且每行、每列及两条对角线上的数字之和都相同。当 N 为奇数时，我们可以通过下方法构建一个幻方：首先将 1 写在第一行的中间。之后，按如下方式从小到大依次填写每个数 K (K=2,3,...,N x N) :1.若 ( 阅读全文

摘要： As you could know there are no male planes nor female planes. However, each plane on Earth likes some other plane. There are n planes on Earth, number 阅读全文

摘要： Farmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are an integer power 阅读全文

摘要： The cows don't use actual bowling balls when they go bowling. They each take a number (in the range 0..99), though, and line up in a standard bowling- 阅读全文

摘要： Assume the coasting is an infinite straight line. Land is in one side of coasting, sea in the other. Each small island is a point locating in the sea 阅读全文

摘要： Farmer John went to cut some wood and left N (2 ≤ N ≤ 100,000) cows eating the grass, as usual. When he returned, he found to his horror that the clus 阅读全文

摘要： Our chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian - polosatiki, but the 阅读全文

摘要： FJ is about to take his N (1 ≤ N ≤ 2,000) cows to the annual"Farmer of the Year" competition. In this contest every farmer arranges his cows in a line 阅读全文

摘要： The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cows create a 5 阅读全文