原题题意 给出长度为n的有序数组,m次询问,每次给出一个正整数x.你要删除数组中最少的元素,使得数组中的前缀和+x都为非负整数.允许离线,n≤750,m≤200,000. 原题思路 首先注意到,x能成功通过测试当且仅当前缀和中最小的数≥x. 将询问从大到小排个序,对于一个新的询问,每次尝试从数组中删除最优的一个数,使得成功的机会更大. 何为最优?我们注意到,ai只会对后面的数造成影响.设当前前缀和最小为now,fi为前i个前缀和中最小的数,则答案会增加 max { min { now-ai ,…

Acknowledgments I would like to thank Jacob Kjome for reviewing early drafts of this document. His comments helped to clarify several important points. Jake also keeps reminding us on the log4j-dev mailing list that the child-parent delegation model…

A. Equator time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Polycarp has created his own training plan to prepare for the programming contests. He will train for nn days, all days are numbe…

Quality 是什么? 通常,我们谈及 Quality(质量)时,最常见的问题就是:Quality 是什么? 有很多业界先驱和研究人员已经回答了这个问题,我在这里并不会再给出一个新的答案.在学习总结了这些关于质量的定义后,可将问题的答案分为两个阵营: 符合要求(Conformance To Requirements):质量就是指产品或服务的可测量的属性满足一组固定的要求,也就是说,符合预先定义的要求. 满足客户需求(Meeting Customer Needs):质量独立于任何可测量的属性,也…

    Programming Contest Problem Types Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems s…

These are the contents of my training session about unit testing, and also have some introductions about how could we write better unit tests with NSubstitute framework. The related sessions: Unit Testing with NSubstitute Building the Testing Pipelin…

Content: Class1 My name is Prince Class2 Welcome to our hotel Class3 We’re not afraid of problems Class4 Doing a job that you like Class5 We should take good care of our eyes Class6 A dog is man's best friend Class7 Knowledge is power Class8 Importan…

Common Pitfalls In Machine Learning Projects In a recent presentation, Ben Hamner described the common pitfalls in machine learning projects he and his colleagues have observed during competitions on Kaggle. The talk was titled "Machine Learning Grem…

伙伴链接:http://www.cnblogs.com/haoying1994/ 一.设计思路 在此前程序拥有的功能:加减有无负数,除法有无余数以及算式可定制的功能的基础上,此次程序又添加了算式结果的计算,提示用户结果正确与否,正确与错误个数和用户意志存入数组的功能. 1.对于运算符的选择和算式个数,各算式的长短均利用随机数函数产生. 2.对于算式计算方面: 只有两个数的加减乘除没有括号时:在减时考虑是否出现负数,除时考虑是否出现余数. 多个数的加减没有乘除和括号时:遇到减号考虑前面结果是否小于…

源代码: //2016 3.6 Cheng Qiqin //四则运算改进 #include <iostream> #include<ctime> #include<cstdlib> #include<iomanip> #include<fstream> using namespace std; void proNum(int &ProNum)//确定题目数量 { cout<<"请输入运算式的数量: "; c…