hdoj   acm    1008

#include<iostream>

usingnamespace std;

intmain()

{

   int N;

   while(cin>>N)

   {

                int time=0,from=0,to=0;

                

                if(N==0) break;

                for(int i=0;i<N;i++)

                {

                        cin>>to;

                        if(to>from)

                        time+=(to-from)*6+5;

                        else

                        time+=(from-to)*4+5;

                        from=to;

                        

                        

                }

                cout<<time<<endl;

   }

}

 这个代码很是纠结，，，，，，