面试题39. 数组中出现次数超过一半的数字

题目：

 

 

解答：

 

 

class Solution {
public:
    int majorityElement(vector<int>& nums) 
    {
        int x = 0;
        int votes = 0;
        for(int num : nums)
        {
            if(votes == 0) 
            {
                x = num;
            }
            if (num == x)
            {
                votes += 1;
            }
            else
            {
                votes -= 1;
            }
            // votes += num == x ? 1 : -1;
        }
        return x;
    }
};