http://pat.zju.edu.cn/contests/pat-practise/1008
1 #include <stdio.h>
2 int number[102];
3 int main()
4 {
5 int N;
6 scanf("%d",&N);
7 int i;
8 for(i=0;i<N;i++)
9 scanf("%d",&number[i]);
10 int sum=0;
11 sum+=6*number[0];
12 for(i=1;i<N;i++){
13 if(number[i]>number[i-1])
14 sum+=6*(number[i]-number[i-1]);
15 else sum+=4*(number[i-1]-number[i]);
16 }
17 printf("%d\n",sum+5*N);
18 }