title: Programming Interview Question / how to find if any two integers in an array sum to zero?
body: <p>Not a homework question, but a possible interview question...</p>
  
  <ol>
  <li>Given an array of integers, write an algorithm that will check if the sum of any two is zero.</li>
  <li>What is the Big O of this solution?</li>
  </ol>
  
  <p>Looking for non brute force methods</p>