LC-2404 Easy LeetCode

2404. Most Frequent Even Element

Read the full problem statement on LeetCode.

Difficulty: easy Acceptance: 52% Topics: Array, Hash Table, Counting

Reading material

Reference solution (spoiler · python)

# Time:  O(n)
# Space: O(n)

import collections


# freq table
class Solution(object):
    def mostFrequentEven(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        cnt = collections.Counter(x for x in nums if x%2 == 0)
        return max(cnt.iterkeys(), key=lambda x: (cnt[x], -x)) if cnt else -1

Solution from kamyu104/LeetCode-Solutions · MIT