using System;

public class Program

{

    public static void Main()

    {

        var s = new Solution();

        s.MyPow(2, 10).Dump();

        s.MyPow(2.1, 3).Dump();

        s.MyPow(2.1, 3).Dump();

        //s.MyPow(0.00001, 2147483647).Dump();

    }

}

​

public class Solution {

    public double MyPow(double x, int n) {

        if(n < 0)

        {

            x = 1 / x;

            n = -n;

        }

​

        double pow = 1;

        while(n > 0)

        {

            pow *= x;

            n--;

        }

        return pow;

    }

}