HDU1008——Elevator

#include <stdio.h>
#define MAX 1000
int main(int argc, const char * argv[]) {
    int n;
    int a[MAX];
    while(scanf("%d",&n)&&n){
        int i;
        int sum=5*(n);
        scanf("%d",&a[0]);
        sum+=6*a[0];
        for(i=1;i<n;i++){
            scanf("%d",&a[i]);
            if(a[i]>a[i-1]){
                sum+=(a[i]-a[i-1])*6;
            }else{
                sum+=(a[i-1]-a[i])*4;
            }
            
        }
        printf("%d\n",sum);
    }
}

凑个数，哈