Repeated Strings |2|
~~~~~~~~~~~~~~~~~~~~

In this question it is asked to determine whether the first half of a
string is exactly the same of its second half. If the string is not
halvable (i.e. has odd number of elements) then and error message has to
be printed.

| For example, "abab" is such a string. When it is divided into two
  equal parts, the parts are "ab" and "ab" and these are the same. On
  the other hand, "abba" is not such a string, because the two halves
  are "ab" and "ba" and they are not the same. If the input string is
  such a ‘repeated string’, you should print "Yes", otherwise, you
  should print "No". If the length of the string is odd then print
  "Error".

.. container:: sampleio

   Sample I/O:

.. |2| image:: ../../figures/difficulty_three.png
   :class: difficulty

.. code:: default

   Input:
   abaaba

   Output:
   Yes

   Input:
   abbbba

   Output:
   No

   Input:
   a

   Output:
   Error

   Input:
   aba

   Output:
   Error

.. raw:: html

   <button type="button" class="collapsible" onclick="toggle()">

Show the Answer

.. raw:: html

   </button>

.. raw:: html

   <div class="hiddenanswer">

.. code:: python

   string = input()
   result = "Yes"
   if len(string) % 2 == 0:
       for index in range(0, int(len(string)/2)):
           if string[index] != string[int(len(string)/2) + index]:
               result = "No"
               break
   else:
       result = "Error"

   print(result)

.. raw:: html

   </div>