I think you did not read about the problem or did not understand what you read. However. An algorithm for that problem can be found (in english) on arXive.org.

s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re^5: Divide array of integers into most similar value halves by Skeeve
in thread Divide array of integers into most similar value halves by Pepe

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