2021/05/19 1008 Elevator (20 分)

#include<stdio.h>
int main()
{
	int this_floor=0; //需要从该层去到目标楼层
	int next_floor;
	int n,i,sumtime=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&next_floor);
		if(next_floor>this_floor)   //往高层爬 
		{
			sumtime+=(next_floor-this_floor)*6;
		}
		else  //往低处走 
		{
			sumtime+=(this_floor-next_floor)*4;
		}
		sumtime+=5;
		this_floor=next_floor; //更新现楼层 
	}
	printf("%d",sumtime); 
	return 0;
}