public class MathUtils
{
    public static double abs(double num)
    {
        if (num < 0)
            return -num;
        else
            return num;
    }
    
    public static int max(int a, int b)
    {
        if (a > b)
            return a;
        else
            return b;
    }
    
    public static void printNumber(double x)
    {
        System.out.println(x);
    }

    public static int pow(int x, int y)
    {
        int result = 1;
        for (int i = 0; i < y; i++)
        {
            result *= x;
        }
        return result;
    }
    
    public static int maxPow(int a, int b, int c, int d)
    {
        return max(pow(a,b), pow(c,d));
    }    
}