1008 Elevator（20 分）

#include
#include
using namespace std;
int up = 6, down = 4, stay = 5;
int ans;
int main()
{
    int n, now = 0, Next;
    scanf("%d", &n);
    while (n--)
    {
        scanf("%d", &Next);
        if (now < Next)ans += (Next - now)*up + stay;
        else ans += (now - Next)*down + stay;
        now = Next;
    }
    printf("%d", ans);
    return 0;
}