杭电——1008

#include<stdio.h>#include<string.h>#include<stdlib.h>#include<math.h>int main(){    int n,count;    while(scanf("%d",&n)!=EOF&&n!=0)    {        int a=0,b=0;        int sum=0;    for(count=1;count<=n;count++)    {        scanf("%d",&a);        if(a>=b)        {            sum+=(a-b)*6+5;        }        else        {            sum+=(b-a)*4+5;        }        b=a;    }    printf("%d\n",sum);    }    return 0;}