My solution in Python

  • 0
    import collections
    class Solution:
        # @param {integer[]} nums
        # @return {integer[]}
        def majorityElement(self, nums):
            length = len(nums)
            counter = collections.Counter(nums)
            if length<3:
                return counter.keys()
            result = []
            words = counter.most_common(3)
            for i in range(0,min(3,len(counter))):
                if words[i][-1]>length/3:
            return result

  • 5

    That clearly violates the O(1) space requirement.

    Also, if you're going down that route, there's no need for such lengthy complicated code, you could just do this:

    def majorityElement(self, nums):
        return [number
                for number, count in collections.Counter(nums).most_common(2)
                if count > len(nums)/3]

    But again, that's an invalid answer because of the linear amount of space used.

  • 0

    Hi, StefanPochmann. Your familiarity with Python is really fantastic! I have seen it again besides the , last time :-) Could I know how long have you been using it? Or could you recommend some nice study material for it?

  • 0

    Nothing "fantastic" here, I just turned the already given pieces into the obvious list comprehension :-). I've been using Python maybe 2-3 years, but I'm not sure. I started with The Quick Python Book but I probably learned more from just using it, for example also at the wonderful CheckIO, a programming challenges website purely for Python. I learned quite a lot by looking at solutions of others there, particularly those of user "veky".

  • 0

    Hi, StefanPochmann. Thank you for your nice reply :-)

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