很简单 直接AC
#include<stdio.h>
int main()
{
int n,i,sum = 0;
int floor[105];
scanf("%d",&n);
floor[0] = 0;
for(i = 1; i <= n; i++)
{
scanf("%d",&floor[i]);
if(floor[i] > floor[i-1])
{
sum += (floor[i] - floor[i - 1]) * 6;
} else {
sum += (floor[i - 1] - floor[i]) * 4;
}
}
sum += 5 * n;
printf("%d",sum);
return 0;
}