Re: puzzle
 From: Emlyn Corrin <Emlyn.NOSPAM.Corrin@xxxxxxxxxxxxxx>
 Date: Fri, 10 Jun 2005 11:06:01 +0200
Darius wrote:
ok here is a puzzle. there is an integer array whose length is odd, and all the numbers in the array appear exactly two times except one. Find the number in O(n) time. Try to do it without using any other data structure.
hint: xor .
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