hdoj1008

 1 #include<stdio.h>
 2 
 3 int elevator[105];
 4 
 5 int main(){
 6     int N;
 7     while(scanf("%d", &N)==1){
 8         if(N==0)    
 9             break;
10         elevator[0]=0;
11         for(int i=1;i<=N;i++)
12             scanf("%d", &elevator[i]);
13         int distance, up=0, down=0;
14         for(int i=0;i<N;i++){
15             distance=elevator[i+1]-elevator[i];
16             if(distance>=0)
17                 up+=distance;
18             else
19                 down-=distance;
20         }
21         int times=N*5+up*6+down*4;
22         printf("%d\n", times);
23 
24     }
25     return 0;
26 }