2013
11-13

# Optimal Parking

When shopping on Long Street, Michael usually parks his car at some random location, and then walks to the stores he needs. Can you help Michael choose a place to park which minimises the distance he needs to walk on his shopping round? Long Street is a straight line, where all positions are integer. You pay for parking in a specific slot, which is an integer position on Long Street. Michael does not want to pay for more than one parking though. He is very strong, and does not mind carrying all the bags around.

The first line of input gives the number of test cases, 1 ≤ t ≤ 100. There are two lines for each test case. The first gives the number of stores Michael wants to visit, 1 ≤ n ≤ 20, and the second gives their n integer positions on Long Street, 0 ≤ xi ≤ 99.

Output for each test case a line with the minimal distance Michael must walk given optimal parking.

2
4
24 13 89 37
6
7 30 41 14 39 42

152
70

//* @author: 82638882@163.com
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner in=new Scanner(System.in);
int a=in.nextInt();
while(a!=0)
{
int b=in.nextInt();
int[] c=new int[b];
for(int i=0;i< b;i++)
{
c[i]=in.nextInt();
}
int d,e,g;
for(d=e=c[0],g=0;g< b;g++)
{
if(d>c[g])d=c[g];
if(e< c[g])e=c[g];
}
System.out.println((e-d)*2);
a--;
}
}
}

1. 博主您好，这是一个内容十分优秀的博客，而且界面也非常漂亮。但是为什么博客的响应速度这么慢，虽然博客的主机在国外，但是我开启VPN还是经常响应很久，再者打开某些页面经常会出现数据库连接出错的提示