陈墨cacm

摘要： Problem DescriptionToday the company has m tasks to complete. The ith task need xi minutes to complete. Meanwhile, this task has a difficulty level yi 阅读全文

摘要： 1.LIS的定义： 最长上升子序列（longest increasing subsequence），也可以叫最长非降序子序列，简称LIS，不是太难。即一个数的序列bi，当b1 < b2 < … < bS的时候，我们称这个序列是上升的。对于给定的一个序列(a1, a2, …, aN)，我们可以得到一些 阅读全文

摘要： Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N! InputOne N in one line, process to the end of file. OutputFor each N, output N! in one 阅读全文

摘要： DescriptionWe know that prime numbers are positive integers that have exactly two distinct positive divisors. Similarly, we'll call a positive integer 阅读全文

摘要： Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to pl 阅读全文

摘要： Password security is a tricky thing. Users prefer simple passwords that are easy to remember (like buddy), but such passwords are often insecure. Some 阅读全文

摘要： Vanya walks late at night along a straight street of length l, lit by n lanterns. Consider the coordinate system with the beginning of the street corr 阅读全文

摘要： Vasya works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to take a couple of ol 阅读全文

摘要： 设计一个对一维数组进行排序的sort函数，并调用它实现数组排序 思路：函数调用不止调用一个，最主要对函数不熟悉； 阅读全文

摘要： Trung is bored with his mathematics homeworks. He takes a piece of chalk and starts writing a sequence of consecutive integers starting with 1 to N (1 阅读全文