解法一：模拟

模拟电梯的运动，根据上一个状态的位置来计算运动耗时。

import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException {
        StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        in.nextToken();
        int N = (int) in.nval;
        final int UP = 6, DOWN = 4, WAIT = 5;
        int last = 0, cur, delta;
        int cost = N * WAIT;
        for (int i = 0; i < N; ++i) {
            in.nextToken();
            cur = (int) in.nval;
            delta = Math.abs(cur - last);
            if (cur > last) {
                cost += UP * delta;
            } else {
                cost += DOWN * delta;
            }
            last = cur;
        }
        out.println(cost);
        out.flush();
    }
}