import java.lang.Math;

public class CPMath
{
	public static double ArcCos(double x)
	{
		return Math.acos(x);
	}

	public static double ArcCosh(double x)
	{
		return Ln(x + Sqrt(x * x - 1.0));
	}

	public static double ArcSin(double x)
	{
		return Math.asin(x);
	}

	public static double ArcSinh(double x)
	{
		if(x >= 0.0)
		{
			return Ln(x + Sqrt(x * x + 1.0));
		}
		else
		{
			return -Ln(-x + Sqrt(x * x + 1.0));
		}
	}

	public static double ArcTan(double x)
	{
		return Math.atan(x);
	}

	public static double ArcTan2(double y, double x)
	{
		return Math.atan2(y, x);
	}

	public static double ArcTanh(double x)
	{
		return Ln((1.0 + x) / (1.0 - x)) / 2.0;
	}

	public static double Ceiling(double x)
	{
		return Math.ceil(x);
	}

	public static double Cos(double x)
	{
		return Math.cos(x);
	}

	public static double Cosh(double x)
	{
		return Math.cosh(x);
	}

	public static double Eps()
	{
		return Math.ulp(1.0);
	}

	public static double Exp(double x)
	{
		return Math.exp(x);
	}

	public static int Exponent(double x)
	{
		return Math.getExponent(x);
	}

	public static double Floor(double x)
	{
		return Math.floor(x);
	}

	public static double Frac(double x)
	{
		if(Math.abs(x) >= 1.0e16)
		{
			return 0;
		}
		else if(x >= 0)
		{
			return x - Floor(x);
		}
		else
		{
			return x + Floor(-x);
		}
	}

	public static double IntPower(double x, int n)
	{
		return Math.pow(x, n);
	}

	public static double Ln(double x)
	{
		return Math.log(x);
	}

	public static double Log(double x)
	{
		return Math.log10(x);
	}

	public static double Mantissa(double x)
	{
		// Not implemented
		SYSTEM.TRAP(-3);
		return 0;
	}

	public static double Pi()
	{
		return Math.PI;
	}

	public static double Power(double x, double y)
	{
		return Math.pow(x, y);
	}

	public static double Real(double m, int e)
	{
		return Math.scalb(m, e);
	}

	public static double Round(double x)
	{
		return Math.round(x);
	}

	public static double Sign(double x)
	{
		return Math.signum(x);
	}

	public static double Sin(double x)
	{
		return Math.sin(x);
	}

	public static double Sinh(double x)
	{
		return Math.sinh(x);
	}

	public static double Sqrt(double x)
	{
		return Math.sqrt(x);
	}

	public static double Tan(double x)
	{
		return Math.tan(x);
	}

	public static double Tanh(double x)
	{
		return Math.tanh(x);
	}

	public static double Trunc(double x)
	{
		if(Math.abs(x) >= 1.0e16)
		{
			return x;
		}
		else if(x >= 0)
		{
			return Floor(x);
		}
		else
		{
			return -Floor(-x);
		}
	}

	public static void BEGIN()
	{

	}
}