HDOJ:Elevator

Elevator

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5054    Accepted Submission(s): 2538 

Problem Description

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.

Input

There are multiple test cases. Each case contains a positive integer N, followed by N positive numbers. All the numbers in the input are less than 100. A test case with N = 0 denotes the end of input. This test case is not to be processed.

Output

Print the total time on a single line for each test case.

Sample Input

1 23 2 3 10

Sample Output

1741

#include<iostream>#define UP 6#define DOWN 4#define STOP 5using namespace std;int main(){ int N; while(cin>>N&&N) {//                pre:previous floor   int totalTime=N*5,pre=0,cur;  while(N--)//            cur:current floor  {   cin>>cur;    if(cur>pre)    totalTime+=(UP*(cur-pre));   else     totalTime+=(DOWN*(pre-cur));   //本来我还写有一句:else  if(pre==cur)   //       totalTime+=5;
   //代表 当输入同一楼层,应该多停5秒,   //结果Wrong Answer   纳闷.. 多虑了.   pre=cur;  }  cout<<totalTime<<endl; } return 0;}