ACM,再见！

http://acm.hdu.edu.cn/showproblem.php?pid=5147Problem DescriptionLong long ago, there is a sequence A with length n. All numbers in this sequence is no smaller than 1 and no bigger than n, a

http://acm.hdu.edu.cn/showproblem.php?pid=4893

下图是对线段[1,10)建立的一棵线段树基本结构1.每个节点都是一个[a,b)的区间，根节点代表了整个所要处理的区间2. 对于每个非叶节点[a,b)，令mid = (a + b) / 2；则其左右儿子节点代表的区间为[a,mid)，[mid,b)3.二叉的组织结构4. 线段树是一个平衡树，树的高度为logN5. 线段树把区间上的任意一条长度为L的线段都分成不超过

http://acm.hdu.edu.cn/showproblem.php?pid=4417Problem DescriptionMario is world-famous plumber. His “burly” figure and amazing jumping ability reminded in our memory. Now the poor princess i

http://codeforces.com/problemset/problem/6/E

http://acm.hdu.edu.cn/showproblem.php?pid=4267Problem DescriptionLet A1, A2, ... , AN be N elements. You need to deal with two kinds of operations. One type of operation is to add a give

http://codeforces.com/problemset/problem/19/DDescriptionPete and Bob invented a new interesting game. Bob takes a sheet of paper and locates a Cartesian coordinate system on it as follows:

http://poj.org/problem?id=3468

http://acm.hdu.edu.cn/showproblem.php?pid=1698

http://acm.hdu.edu.cn/showproblem.php?pid=4288Problem Description　　In mathematics and computer science, an algorithm describes a set of procedures or instructions that define a procedure

http://acm.hdu.edu.cn/showproblem.php?pid=4902

http://acm.hdu.edu.cn/showproblem.php?pid=5195Problem DescriptionA topological sort or topological ordering of a directed graph is a linear ordering of its vertices such that for every d

http://acm.hdu.edu.cn/showproblem.php?pid=4747Problem DescriptionMex is a function on a set of integers, which is universally used for impartial game theorem. For a non-negative integer set

http://www.lightoj.com/volume_showproblem.php?problem=1080

http://poj.org/problem?id=2777

Problem DescriptionC国的死对头A国这段时间正在进行军事演习，所以C国间谍头子Derek和他手下Tidy又开始忙乎了。A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务就是要监视这些工兵营地的活动情况。由于采取了某种先进的监测手段，所以每个工兵营地的人数C国都掌握的一清二楚,每个工兵营地的人数都有可能发生变动，可能增加或减少若干人手,但这些都逃不过C国的监视

http://acm.hdu.edu.cn/showproblem.php?pid=2665Problem DescriptionGive you a sequence and ask you the kth big number of a inteval. InputThe first line is the number of the t

http://acm.hdu.edu.cn/showproblem.php?pid=4339Problem DescriptionYou are given two strings s1[0..l1], s2[0..l2] and Q - number of queries.Your task is to answer next queries:  1) 1 a i c

http://acm.hdu.edu.cn/showproblem.php?pid=3973Problem DescriptionYou are given some words {Wi}. Then our stupid AC will give you a very long string S. AC is stupid and always wants to know w

http://acdream.info/problem?pid=1019Problem DescriptionNow we have a long long string, and we will have two kinds of operation on it.C i y : change the ith letter to y.Q i j : check whet

http://acm.hdu.edu.cn/showproblem.php?pid=5023

http://acm.hdu.edu.cn/showproblem.php?pid=4970Problem DescriptionKingdom Rush is a popular TD game, in which you should build some towers to protect your kingdom from monsters. And now anoth

http://codeforces.com/contest/589/problem/GG. Hiringtime limit per test4 secondsmemory limit per test512 megabytesinputstandard inputoutputstandard outp