Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements that appear only once.
For example:
Given nums = [1, 2, 1, 3, 2, 5], return [3, 5].
 Note:
[5, 3] is also correct.
这道题
[LeetCode] Single Number III 单独的数字之三
原文:http://www.cnblogs.com/grandyang/p/4741122.html