杭电1008

点击打开题目链接

 

#include<iostream>using namespace std;int main(){    int a,b,time;    int N;    while(cin>>N)    {        if(N==0)            return 0;        a=b=0;        time=0;        for(int i=0;i<N;i++)        {            cin>>a;            if(a>b)                time=time+(a-b)*6+5;            else                time=time+(b-a)*4+5;            b=a;        }        cout<<time<<endl;    }    return 0;}