HDOJ-1008 Elevator

//模拟 无亮点
# include <stdio.h>

int main()
{
	int n;
	while(scanf("%d",&n) && n)
	{
		int Target, Last = 0, Time = 0;
		for(int i = 1; i <= n; i++)
		{
			scanf("%d",&Target);

			if(Target > Last)
				Time += (Target - Last) * 6 + 5;
			else
				Time += (Last - Target) * 4 + 5;

			Last = Target;
		}
		printf("%d\n",Time);
	}

	return 0;
}