int main()
{
int a_len,i,j,k,up,start,nn,mm,position,out;
int array[50];
int seq[50];
int clock[50];
int answer[50];
printf("Please input numbers of crystals:\n");
scanf("%d",&a_len);
printf("Please input each number(separated by space):\n");
for(i=1;i<=a_len;i++)
{
scanf("%d",&array);
}