Find All Duplicates in an Array

这题放在了中等难度中，确实莫名的简单，可能出题方没有考虑有三个数字重复的情况吧。

#442
#https://leetcode.com/problems/find-all-duplicates-in-an-array/description/
#2018.4.29

class Solution(object):
    def findDuplicates(self, nums):
        nums.sort()
        outs = []
        for i in range(0,len(nums)-1):
        	if nums[i]==nums[i+1]:
        		outs.append(nums[i])
        return outs