HDOJ-ACM1008(JAVA)

 

 

这道题很简单，主要是要搞清楚题目的意思

以下是JAVA语言实现：

import java.util.*;
import java.io.*;

public class Main{

    public static void main(String[] arg){
        Scanner scan = new Scanner(new BufferedInputStream(System.in));
        int n;
        while((n=scan.nextInt())!=0){
            int time = 0;
            int before = 0;
            while(n--!=0){
                int a = scan.nextInt();
                if(a<before){
                    time = time + (before-a)*4 + 5;
                }else{
                    time = time + (a - before)*6 + 5;
                }
                before = a;
            }
            System.out.println(time);
        }
        scan.close();
    }

}