[html]Bootstrat dropdown menu while hover

2019-3-11 写技术

In order to display the dropdown menu while hover the nav, I add some scripts like this: function isMobile(){ if (navigator.userAgent.match(/Android/i) || navigator.userAgent.indexOf('iPhone') != -1 || navigator.userAgent.indexOf('iPod') != -1 || navigator.userAgent.indexOf('iPad') != -1) {...

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[OJ]1015: 机器人训练

2019-2-25 写技术

Description Dr. Shelden最近制造了一种新机器人,现在他要开始给他的机器人做一些简单训练啦。 Shelden在实验室的地面上铺了一些箭头,这些箭头可以看成是二维平面上的一些有向线段,而且都是水平线段或垂直线段,将这些线段从1开始编号,机器人一开始在第1条线段的起点处。现在shelden要写一个程序让他的机器人能够规划一条最短的路径按编号顺序从小到大通过所有的有向线段(只有从线段的起点走到终点才算通过)。机器人每次都只能做90°转弯,而且由于每次转弯都将耗费很大能量,所以shelden希望所求路径的转弯总次数最少。比如在下面这个例子中,实验...

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[OJ]1014:西湖三人行

2019-2-19 写技术

Description 去年10月份,FightOn队伍的三个人YZW、HKX、WX在参加完杭州赛区后想到杭州最有名的西湖去玩。他们所能选择的交通方式只有三种: 走路,速度为1m/s,每人每千米花费1元钱(因为他们会消耗体力,需要买水、食物等)。 搭公交,速度为4m/s,每人2元,每条公交路线都按照一定的方向。 打的,速度为8m/s,起步价3千米内10元,以后每千米2元,每个站点都有的士。 当然杭州的交通秩序不像长沙,所以如果想改变交通方式只能在每个站点改换。三个人现在囊中羞...

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[OJ]1013: 狐狸与小狗

2019-1-15 写技术

Description Upwinder最近喜欢上了一款古老的起源于Scandinavia(斯堪迪纳维亚半岛)的小游戏。具体的游戏规则如下: 1. 棋盘设定 棋盘的大小为8行8列,有两个玩家:狐狸和小狗。初始的时候有4只小狗被放置在棋盘最上边一行的4个黑色格子里;而1只狐狸被放在最下边一行的某个黑色格子里。以棋盘左上角为原点,向下为行的正方向,向右为列的正方向,从1开始给每一个格子编号. 2. 移动规则 (1) 两个玩家轮流下棋。 (2) 狐狸每轮可以斜着向上或斜着向下移动至相邻的一个空...

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[OJ]1012:Prestige

2019-1-14 写技术

Description Are you watching closely? Every great magic trick consists of three acts. The first act is called The Pledge, the magician shows you something ordinary, but of course, it probably isn't. The second act is called The Turn. The magician makes his ordinary something ...

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[OJ]1011:Counting Pixels

2019-1-13 写技术

Description Did you know that if you draw a circle that fills the screen on your 1080p high definition display, almost a million pixels are lit? That's a lot of pixels! But do you know exactly how many pixels are lit? Let's find out! Assume that our display is set on a Cartes...

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[OJ]1010:Water Drinking

2019-1-13 写技术

Description The Happy Desert is full of sands. There is only a kind of animal called camel living on the Happy Desert. Cause they live here, they need water here. Fortunately, they find a pond which is full of water in the east corner of the desert. Though small, but enough. However...

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[OJ]1009:抛硬币

2019-1-12 写技术

Description James得到了一堆有趣的硬币,于是决定用这些硬币跟朋友们玩个小游戏。在一个N行M列的表格上,每一个第i行第j列的格子上都放有一枚James的硬币,抛该硬币正面朝上的概率为Pij,所有抛硬币事件两两之间是相互独立的。 现在,玩家在M列硬币中,从每一列里各选择1枚,共M枚,构成一组。如此重复选择N组出来,且保证被选择过的硬币不能再选。选好组之后,每组的M枚硬币各抛一次,如果都是正面朝上,则该组胜利,总分赢得1分;否则该组失败,总分不加也不减。请问,如果让你自行选择硬币的分组,游戏总得分的数学期望的最大值是多少? ...

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[OJ]1008:

2019-1-12 写技术

Description A Horcrux is an object in which a Dark wizard or witch has hidden a fragment of his or her soul for the purpose of attaining immortality. Constructing a Horcrux is considered Dark magic of the foulest, most evil kind, as it violates laws of nature and morality, and requi...

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[OJ]1005:Binary Search Tree analog

2019-1-11 写技术

Input The first integer of the input is T, the number of test cases. Each test case has two lines. The first line contain an integer N,(1<=N<=1000), the number of numbers need to be inserted into the BST. The second line contain N integers separated by space, each integer is in the...

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