public void add(TreeElement elem) {
        /*TreeElement flag = getTreeRoot();
        while(flag.getLeftElemnt() != null || flag.getRightElemnt() != null || flag == null) {
            if(elem.getValue() <= getTreeRoot().getValue()) {
                flag = flag.getLeftElemnt();
            } else {
                flag = flag.getRightElemnt();
            }
        }

        if(elem.getValue() <= flag.getValue()) {
            flag.setLeftElemnt(elem);
        } else {
            flag.setRightElemnt(elem);
        }*/
        TreeElement flag = getTreeRoot();
        while (true) {
            if(elem.getValue() <= flag.getValue()) {
                if (flag.getLeftElemnt() != null) {
                    flag = flag.getLeftElemnt();
                } else {
                    flag.setLeftElemnt(elem);
                    return;
                }
            } else {
                if (flag.getRightElemnt() != null) {
                    flag = flag.getRightElemnt();
                } else {
                    flag.setRightElemnt(elem);
                    return;
                }
            }
        }
    }