1392:Surround the Trees

题目描述
There are a lot of trees in an area. A peasant wants to buy a rope to surround all these trees. So at first he must know the minimal required length of the rope. However, he does not know how to calculate it. Can you help him?
The diameter and length of the trees are omitted, which means a tree can be seen as a point. The thickness of the rope is also omitted which means a rope can be seen as a line.



There are no more than 100 trees.
输入解释
The input contains one or more data sets. At first line of each input data set is number of trees in this data set, it is followed by series of coordinates of the trees. Each coordinate is a positive integer pair, and each integer is less than 32767. Each pair is separated by blank.

Zero at line for number of trees terminates the input for your program.
输出解释
The minimal length of the rope. The precision should be 10^-2.
输入样例
9 
12 7 
24 9 
30 5 
41 9 
80 7 
50 87 
22 9 
45 1 
50 7 
0 
输出样例
243.06
来自杭电HDUOJ的附加信息
Recommend Ignatius.L

该题目是Virtual Judge题目,来自 杭电HDUOJ

源链接: HDU-1392

最后修改于 2020-10-25 22:44:33 UTC 由爬虫自动更新

共提交 244

通过率 84.84%
时间上限 内存上限
2000/1000MS(Java/Others) 65536/32768K(Java/Others)

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