169. Majority Element

https://leetcode.com/problems/majority-element/#/description

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.

You may assume that the array is non-empty and the majority element always exist in the array.

Credits:
Special thanks to @ts for adding this problem and creating all test cases.

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Array Divide and Conquer Bit Manipulation

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(M) Majority Element II

jhy

思路

• 其实很简单，这种类似的题目都是建立字典即

class Solution(object):

    
    def majorityElement(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        if len(nums) == 1:
            return nums[0]
        d = {}
        for num in nums:
            
            if num in d.keys():
                d[num] += 1
                if d[num] >= len(nums) // 2:
                    return num
            else:
                d[num] = 0
        
        

229. Majority Element II

https://leetcode.com/problems/majority-element-ii/#/description
Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. The algorithm should run in linear time and in O(1) space.

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Array

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(E) Majority Element