Min+

class ListaRealnih {

    class Element {
        double info;
        Element point;

        public Element (double nu) {
            this.info = nu;
            this.point = null;
        }

        public String toString () {
            return info + (point != null ? " " + point : "");
        }
    }

    Element first, last;

    public ListaRealnih () {
        this.first = null;
        this.last = null;
    }

    public void addFront (double nu) {
        Element el = new Element(nu);
        el.point = first;
        first = el;
        if (last == null) {
            last = first;
        }
    }

    public void add (double nu) {
        Element el = new Element(nu);
        if (first == null) {
            addFront(nu);
        }
        else {
            last.point = el;
            last = el;
        }
    }

    public void deleteB (double nu) {
        boolean done = false;
        Element runThrough = first.point;
        Element rem = first;
        if (rem.info == nu) {
            first = first.point;
            done = true;
        }
        while (runThrough != null && !done) {
            if (runThrough.info == nu) {
                rem.point = runThrough.point;
                done = true;
            }
            else {
                runThrough = runThrough.point;
                rem = rem.point;
            }
        }
    }

    public void insertCtoB(double nu1, double nu2) {
        Element c = new Element (nu1);
        Element beforeB = new Element(0);
        Element afterB = first;
        boolean none = false;
        while (afterB.point != null) {
            if (afterB.point.info == nu2) {
                beforeB = afterB;
                afterB = afterB.point;
                none = true;
            } else {
                afterB = afterB.point;
            }
        }
        if (first.info == nu2 && !none) {
            c.point = first.point;
            first = c;
        } else {
            c.point = beforeB.point.point;
            beforeB.point = c;
        }
    }

    public void deleteMin() {
        Element beforeMin = first;
        Element runThrough = first;
        while (runThrough.point != null) {
            if (runThrough.point.info < beforeMin.point.info) {
                beforeMin = runThrough;
                runThrough = runThrough.point;
            } else {
                runThrough = runThrough.point;
            }
        }
        if (first.info < beforeMin.info) {
            first = first.point;
        } else {
            beforeMin.point = beforeMin.point.point;
        }
    }

    public void firstToLast () {
        last.point = first;
        last = first;
        first = first.point;
        last.point = null;
    }
}