hdoj   acm    1008

#include<iostream>

using
namespace std;

int
main()

{


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，，，，，，