Elevator

 1 #include <iostream>
 2 #include <cstdio>
 3 
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     int i, n, m, time;
 9     int floors[100] = {0};
10     while(cin>>n && n) {
11         time = 0;
12         cin >> floors[0];
13         time += floors[0]*6 + 5;
14         for(i=1; i<n; i++) {
15             cin >> floors[i];
16             m = floors[i] - floors[i-1];
17             if(m > 0) {
18                 time += m*6 + 5;
19             }else{
20                 time += (-m)*4 + 5;
21             }
22         }
23         cout << time << endl;
24     }
25     return 0;
26 }