1008. Elevator (20)

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
	int n;
	scanf("%d", &n);

	int former = 0, i, res = n * 5, cur;
	for(i = 1; i <= n; i++)
	{
		scanf("%d", &cur);

		if(cur > former)
		{
			res += (cur - former) * 6;
		}
		else
		{
			res += (former - cur) * 4;
		}

		former = cur;
	}

	printf("%d\n", res);

	system("pause");
	return 0;
}