Hdu 1008 Elevator

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1008

水题，主要是逻辑关系搞清楚！ 

 2 using namespace std;
 3 #include<iostream>
 4 int move(int c, int n){
 5     if(c < n)    return (n-c)*6 + 5;
 6     else return (c-n)*4 + 5;
 7 }
 8 
 9 int main() 
10 {
11     int n, curfloor, nextfloor, time;
12     while(scanf("%d", &n)){
13         if(n == 0)    break;
14         time = curfloor = 0;
15         while(n--){
16             scanf("%d", &nextfloor);
17             time += move(curfloor, nextfloor);
18             curfloor = nextfloor;
19         }
20         printf("%d\n", time);
21     }
22     return 0;
23 }