169. Majority Element

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.

class Solution(object):
    def majorityElement(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        a=0
        b=0
        for i in nums:
            if b==0:
                a=i
                b=1
            else:
                if a==i:
                    b+=1
                else:
                    b-=1
        return a