HDOJ1008

#include "iostream"
using namespace std;

int main()
{
    while(1)
    {
        int n;
        cin >> n;
        if (n == 0)
            break;
        int m1=0;
        int m2=0;
        int time=0;
        for(int i=0;i<n;i++)
        {
            cin >> m2;
            if(m2 > m1)
                time = time + (m2-m1)*6;
            else if (m2 < m1)
                time = time + (m1-m2)*4;
            m1 = m2;
        }
        cout << time + n*5<<endl;

    }
}

水题，一次AC