The Doors Time Limit: 1000MS Memory Limit: 10000K Description You are to find the length of the shortest path through a chamber containing obstructing walls. The chamber will always have sides at x = 0, x = 10, y = 0, and y = 10. The initial and fina…

Alice's Chance Time Limit: 1000MS Memory Limit: 10000K Description Alice, a charming girl, have been dreaming of being a movie star for long. Her chances will come now, for several filmmaking companies invite her to play the chief role in their new f…

又是慈溪那边给的题目,这次终于没有像上次那样尴尬了, T1拿到了较高的暴力分,T2没写炸,然后T3写了一个优雅的暴力就203pts,Rank3了. 听说其它学校的分数普遍100+,那我们学校还不是强到飞起. 装备(equipment.pas/cpp/c) 这题目出的真心长,让我联想到我们语文老师说的: 以后教育改革可能不只是语文,其他学科的考试题目字数都要显著增加了,到时后数学大题你看都看不完. 原来连OI的题目都有这种趋势. 我们精简题意后发现:给你两段序列,求两两乘积的第\(k\)大值. 然…

1588: [HNOI2002]营业额统计 Time Limit: 5 Sec Memory Limit: 162 MB Description 营业额统计 Tiger最近被公司升任为营业部经理,他上任后接受公司交给的第一项任务便是统计并分析公司成立以来的营业情况. Tiger拿出了公司的账本,账本上记录了公司成立以来每天的营业额.分析营业情况是一项相当复杂的工作.由于节假日,大减价或者是其他情况的时候,营业额会出现一定的波动,当然一定的波动是能够接受的,但是在某些时候营业额突变得很高或是很低,…

1208: [HNOI2004]宠物收养所 Time Limit: 10 Sec Memory Limit: 162 MB Description 最近,阿Q开了一间宠物收养所.收养所提供两种服务:收养被主人遗弃的宠物和让新的主人领养这些宠物.每个领养者都希望领养到自己满意的宠物,阿Q根据领养者的要求通过他自己发明的一个特殊的公式,得出该领养者希望领养的宠物的特点值a(a是一个正整数,a<2^31),而他也给每个处在收养所的宠物一个特点值.这样他就能够很方便的处理整个领养宠物的过程了,宠物收养所…

P2936 [USACO09JAN]全流Total Flow 题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different…

Power Network Time Limit: 2000MS Memory Limit: 32768K Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied with an amount s(u) >= 0 of power, may produc…

Gopher II Time Limit: 2000MS Memory Limit: 65536K Description The gopher family, having averted the canine threat, must face a new predator. The are n gophers and m gopher holes, each at distinct (x, y) coordinates. A hawk arrives and if a gopher doe…

Drainage Ditches Time Limit: 1000MS Memory Limit: 10000K Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover patch. This means that the clover is covered by water for awhile and takes quite a long time…

构造函数,是一种特殊的方法.主要用来在创建对象时初始化对象,即为对象成员变量赋初始值,总与new运算符一起使用在创建对象的语句中.特别的一个类可以有多个构造函数,可根据其参数个数的不同或参数类型的不同来区分它们即构造函数的重载.写一个类,如果没有写任何的构造函数,那么这个类有一个默认的无参数的构造函数.如果写了构造函数,那么在这个类中就有两个构造函数,一个默认的,一个是自己写的,不过,自己写了构造函数,之前默认的那个构造函数就不能用了,如果还想用之前的那个默认的构造函数,就必须再重新写一个无参数…