计算几何……不会啊 我们定义 $x$$y$ 的叉积是 $|x||y| sin$ 用坐标表示就是 $x1y2 x2y1$ 根据叉积可以判断两个的夹角 然后维护一个上凸壳和下凸壳，就可以求出凸包的周长了。 ...
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其他好文 时间：
2020-05-02 19:13:31
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61
"题目" For their physical fitness program, $N (2 ≤ N ≤ 1,000,000)$ cows have decided to run a relay race using the $T (2 ≤ T ≤ 100)$ cow trails througho ...
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其他好文 时间：
2020-04-28 15:29:35
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57
Farmer John has decided to reward his cows for their hard work by taking them on a tour of the big city! The cows must decide how best to spend their ...
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其他好文 时间：
2020-04-10 15:56:32
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76
Opel Astra G 2001 key was successfully programmed by SVDI 2018, here we go for details. Car model and year: Opel Astra G 2001 Symptom: lost transponde ...
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其他好文 时间：
2020-04-08 12:15:47
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71
题目 Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backward, ...
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其他好文 时间：
2020-04-06 17:13:28
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68
题目 Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backward, ...
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其他好文 时间：
2020-04-06 09:56:48
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80
题目描述 Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backwar ...
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其他好文 时间：
2020-04-06 00:23:00
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298
Linux命令 目录结构 /etc ：用来存放所有的系统管理所需要的配置文件和子目录 /home ：用户的主目录，在Linux中，每个用户都有一个自己的目录，一般改目录名是以用户账号命名的 /lib ：存放着最基本的动态连接共享库，起作用类似于Windows里的DLL文件（不要动） /lost+fo ...
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系统相关 时间：
2020-04-03 12:02:00
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109
Bessie is out in the field and wants to get back to the barn to get as much sleep as possible before Farmer John wakes her for the morning milking. Be ...
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其他好文 时间：
2020-03-30 00:21:16
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101
题目描述 The cows are being invaded! Their republic comprises N (1 <= N <= 50,000) towns that are connected by M (1 <= M <= 100,000) undirected paths betw ...
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其他好文 时间：
2020-03-24 09:16:45
阅读次数：
78
