HDU-1008

原题 

#include<cstdio>
#include<iostream>
using namespace std;
int main(void)
{
int i,n,sum,temp,cur;
while(scanf("%d",&n)&&n){
    cur=0;
    sum=0;
for(i=1;i<=n;i++){
scanf("%d",&temp);
if(temp>cur)sum+=(temp-cur)*6+5;
else sum+=(cur-temp)*4+5;
cur=temp;
}
printf("%d\n",sum);
}
return 0;
}