Description 通常把在 n 个排好序的数中，位于最中间的数就走“中位数”，这里再规定细一点，如果 n 是奇数，那么最中间的数只有一个，那就是“中位数”，但如果 n 是偶数，那么最中间的数有两个，我们把这两个数的平均数也叫作“中...

ACM思维题训练集合 There is a board with a grid consisting of n rows and m columns, the rows are numbered from 1 from top to bottom and the columns are numbered from 1...

ACM思维题训练集合 A new Berland businessman Vitaly is going to open a household appliances’ store. All he’s got to do now is to hire the staff.

ACM思维题训练集合 A bracket sequence is a string containing only characters “(” and “)”.

Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".

Fibonacci数列，定义如下： f(1)=f(2)=1 f(n)=f(n-1)+f(n-2) n>=3。 计算第n项Fibonacci数值。

On a grid map there are n little men and n houses. In each unit time, every little man can move one unit step, either horizontally, or vertically, to an adjacen...

Perfect Election Time Limit: 5000MS         Memory Limit: 65536K Total Submissions: 964         Accepted: 431 Description

Problem Description 小时候，乡愁是一枚小小的邮票，我在这头，母亲在那头。                         —— 余光中

Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2 <= N <= 1,000) cows numbered 1..N standing along a straight lin...