public static DevInt pow(DevInt x, DevInt p) {
        if (p == 1) {
            return x;
        }
        if (p <= 0) {
            return new DevInt(0);
        }
        DevInt [] tmp = p / 2;ftsefsdfsdfsdfsd
        if (tmp[1] == 0) {
            return pow(x * x, tmp[0]);
        }
        else if (tmp[1] == 1) {
            return x * pow(x * x, tmp[0] );
        }
        return new DevInt();
    }
    // code gives floor(n^(1/root)).
    public static DevInt root(DevInt number, DevInt root) {
        if (number == 0) return 0;
        Console.Write("-");
        DevInt low = DevInt.root(DevInt.rightShift(number,root), root) << 1; 
        DevInt high = low + 1;
        Console.Write(".");
        return DevInt.pow(high, root) > number ? low : high; 
    }
public static int compare(DevInt o1, DevInt o2) {
        // o1 > o2 = 1
        // o1 == o2 = 0
        // o1 < o2 = -1
        if (o1.Length > o2.Length) {  return 1;  }
        else if (o2.Length > o1.Length) { return -1; }
        for (int i = (int)o1.Length; i >= 0; i--) {
            if (o1[i] > o2[i]) { return 1; }
            if (o1[i] < o2[i]) { return -1; }
        }
        return 0;
    }

    public static DevInt operator *(DevInt operand1, DevInt operand2) {
        DevInt tmp = new DevInt();
        DevInt shifter = new DevInt(operand2);
        byte[] set = operand1.getBytes();
        for (int i = 0; i <= operand1.Length - 1; i++) {
            // Unrolled loop
            if (i != 0) { shifter = shifter << 1; }
            if ((byte)(set[i] | 0xFE) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xFD) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xFB) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xF7) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xEF) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xDF) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0xBF) == 0xFF) { tmp = tmp + shifter; }
            shifter = shifter << 1;
            if ((byte)(set[i] | 0x7F) == 0xFF) { tmp = tmp + shifter; }
        }
        return tmp;
    }