【题解】PATA-1008 Elevator

Elevator(PATA-1008)

题面

The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers denote at which floors the elevator will stop, in specified order. It costs 6 seconds to move the elevator up one floor, and 4 seconds to move down one floor. The elevator will stay for 5 seconds at each stop.

For a given request list, you are to compute the total time spent to fulfill the requests on the list. The elevator is on the 0th floor at the beginning and does not have to return to the ground floor when the requests are fulfilled.

输入

Each input file contains one test case. Each case contains a positive integer N, followed by N positive numbers. All the numbers in the input are less than 100.

输出

For each test case, print the total time on a single line.

样例输入

1
3 2 3 1

样例输出

1
41

提示

思路

电梯初始在0层,每上升一层花费6s,下降一层花费4s,停留花费5s,给你要停的楼层序列,求总耗时。水题。

代码

查看代码
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
int main()
{
int n; scanf("%d", &n);

int ans = 0, l = 0, t;
for(int i=0; i<n; i++){
scanf("%d", &t);
if(t > l){
ans += (t-l) * 6 + 5;
}else{
ans += (l-t) * 4 + 5;
}
l = t;
}
printf("%d\n", ans);

return 0;
}
_/_/_/_/_/ EOF _/_/_/_/_/