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By: a guest on May 7th, 2012  |  syntax: None  |  size: 0.31 KB  |  hits: 10  |  expires: Never
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  1. Find a single integer that occurs with even frequency in a given array of ints when all others occur odd with frequency
  2. for each number:
  3.   if it's not in the hash table, mark its spot in the table as 1.
  4.  
  5.   if it is in the hash table then:
  6.     if its value is '1', make it '2'
  7.     if its value is '2', make it '1'.
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