class Program
{
static void Main(string[] args)
{
//Find rules:
//1,1,2,3,5,8,13,21,34,55,......
int num = 30;
(GetNum(30));
();
}
/// <summary>
/// Find the value of the 30th digit
/// </summary>
/// <param name="i"></param>
/// <returns></returns>
private static int GetNum(int i)
{
if (i<=0)
{
return 0;
}else if (i>0 && i<=2)
{
return 1;
}
else
{
return GetNum(i - 1) + GetNum(i - 2);
}
}
}