1008_Elevator (20分)[模拟]

 1 #include<iostream>
 2 #include<vector>
 3 #include<queue>
 4 #include<map>
 5 #include<set>
 6 #include<cmath>
 7 #include<cstdio>
 8 #include<cstdlib>
 9 #include<cstring>
10 #include<algorithm>
11 using namespace std;
12 
13 int N, pre, last, res;
14 
15 int main()
16 {
17     cin >> N;
18     pre = res = 0;
19     res += N * 5;
20     for (int i = 0; i < N; i++) {
21         cin >> last;
22         if (last > pre) res += (last - pre) * 6;
23         else if (last < pre) res += (pre - last) * 4;
24         pre = last;
25     }
26     cout << res << endl;
27     return 0;
28 }