ZbirParni

import java.util.Scanner;
class SLLNode<E> {
    protected E element;
    protected SLLNode<E> succ;

    public SLLNode(E elem, SLLNode<E> succ) {
        this.element = elem;
        this.succ = succ;
    }

    @Override
    public String toString() {
        return element.toString();
    }
}
class SLL<E> {
    private SLLNode<E> first;

    public SLL() {
        // Construct an empty SLL
        this.first = null;
    }



    public void deleteList() {
        first = null;
    }

    public int length() {
        int ret;
        if (first != null) {
            SLLNode<E> tmp = first;
            ret = 1;
            while (tmp.succ != null) {
                tmp = tmp.succ;
                ret++;
            }
            return ret;
        } else
            return 0;

    }

    @Override
    public String toString() {
        String ret = new String();
        if (first != null) {
            SLLNode<E> tmp = first;
            ret += tmp + " ";
            while (tmp.succ != null) {
                tmp = tmp.succ;
                ret += tmp + " ";
            }
        } else{
            ret = "Prazna lista!!!";
        }

        return ret;
    }


    public void insertFirst(E o) {
        SLLNode<E> ins = new SLLNode<E>(o, first);
        first = ins;
    }

    public void insertAfter(E o, SLLNode<E> node) {
        if (node != null) {
            SLLNode<E> ins = new SLLNode<E>(o, node.succ);
            node.succ = ins;
        } else {
            System.out.println("Dadenot jazol e null");
        }
    }

    public void insertBefore(E o, SLLNode<E> before) {

        if (first != null) {
            SLLNode<E> tmp = first;
            if(first==before){
                this.insertFirst(o);
                return;
            }
            //ako first!=before
            while (tmp.succ != before){
                tmp = tmp.succ;
            }

            if (tmp.succ == before) {
                SLLNode<E> ins = new SLLNode<E>(o, before);
                tmp.succ = ins;
            } else {
                System.out.println("Elementot ne postoi vo listata");
            }
        } else {
            System.out.println("Listata e prazna");
        }
    }

    public void insertLast(E o) {
        if (first != null) {
            SLLNode<E> tmp = first;
            while (tmp.succ != null)
                tmp = tmp.succ;

            SLLNode<E> ins = new SLLNode<E>(o, null);
            tmp.succ = ins;
        } else {
            insertFirst(o);
        }
    }

    public E deleteFirst() {
        if (first != null) {
            SLLNode<E> tmp = first;
            first = first.succ;
            return tmp.element;
        } else {
            System.out.println("Listata e prazna");
            return null;
        }
    }

    public E delete(SLLNode<E> node) {
        if (first != null) {
            SLLNode<E> tmp = first;
            if(first ==node){
                return this.deleteFirst();
            }
            while (tmp.succ != node && tmp.succ.succ != null)
                tmp = tmp.succ;

            if (tmp.succ == node) {
                tmp.succ = tmp.succ.succ;
                return node.element;
            } else {
                System.out.println("Elementot ne postoi vo listata");
                return null;
            }
        } else {
            System.out.println("Listata e prazna");
            return null;
        }

    }

    public SLLNode<E> getFirst() {
        return first;
    }

    public SLLNode<E> find(E o) {
        if (first != null) {
            SLLNode<E> tmp = first;
            while (tmp.element != o && tmp.succ != null)
                tmp = tmp.succ;
            if (tmp.element == o) {
                return tmp;
            } else {
                System.out.println("Elementot ne postoi vo listata");
            }
        } else {
            System.out.println("Listata e prazna");
        }
        return first;
    }



    public void mirror(){
        if (first != null) {
            //m=nextsucc, p=tmp,q=next
            SLLNode<E> tmp = first;
            SLLNode<E> newsucc = null;
            SLLNode<E> next;

            while(tmp != null){
                next = tmp.succ;
                tmp.succ = newsucc;
                newsucc = tmp;
                tmp = next;
            }
            first = newsucc;
        }

    }

    public void merge (SLL<E> in){
        if (first != null) {
            SLLNode<E> tmp = first;
            while(tmp.succ != null)
                tmp = tmp.succ;

            tmp.succ = in.getFirst();
        }
        else{
            first = in.getFirst();
        }
    }
}
public class PalindromeDLL {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
      Scanner sc=new Scanner(System.in);
      Integer n=sc.nextInt();
      SLL<Integer>lista=new SLL<Integer>();
      for(int i=0;i<n;i++) {
          lista.insertLast(sc.nextInt());
      }
      Integer pocetok=sc.nextInt();
      Integer kraj=sc.nextInt();
      SLLNode<Integer> tmp=lista.getFirst();
      Integer suma=0;
      for(int i=0;i<n;i++) {
      if(i>=pocetok && i<=kraj) {
          suma+=tmp.element;
      }
      tmp=tmp.succ;
    }

      tmp=lista.getFirst();
    for(int i=0;i<n;i++) {
        if(i%2==0) {
            lista.insertAfter(suma, tmp);
            SLLNode<Integer> kopija=tmp;
            tmp=tmp.succ;
            lista.delete(kopija);
        }
        tmp=tmp.succ;
    }

    System.out.println(lista.toString());
    }

}