Reword the question so it's less ambiguous so I can understand the question and answer it on my own....

Reword the question below so it's less ambiguous so I can understand the question and answer it on my own.  maybe give example diagram/inputs/outputs (primitives if possible) but don't show any algorithms in the answer. I know big theta notation/sorting algorithms etc..  This question has been answered at brainmass but I don't want the answer just the question being less ambiguous to me.

Question:
Sometimes a slight change in a problem can significantly alter the form of its solution.  For example, find a simple algorithm for solving the following problem and classify it using big-theta notation:

Divide a group of people into two disjoint subgroups (of arbitrary size) such that the difference in the total ages of the members of the two subgroups is as large as possible.