//Testcase
static void Main(string[] args)
{
Solution sol = new Solution();
int rand_num = new Random().Next(0, 1000);
if (sol.IsPowerOfThree(rand_num))
{
Console.Write(rand_num + " is power of three.");
}
else
{
Console.Write(rand_num + " isn't power of three.");
}
}
