CDZSC_2015寒假新人（1）——基础 B

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
struct dangchi
{
    char str[20];
    int sum;
};
int main()
{
#ifdef CDZSC_OFFLINE
    freopen("in.txt","r",stdin);
#endif
    int n,a,b,sum;
    while(scanf("%d",&n)&&n!=0)
    {
        b=0,sum=0;
        while(n--)
        {
            scanf("%d",&a);
            if(a>b)
            {
                sum+=(a-b)*6+5;
                b=a;
            }
            else if(a<b)
            {
                sum+=(b-a)*4+5;
                b=a;
            }
            else
            {
                sum+=5;
            }
        }
        printf("%d\n",sum);
    }
    return 0;
}