52. 数组中出现次数超过一半的数字

class Solution {
public:
    int moreThanHalfNum_Solution(vector<int>& nums) {
        int cnt = 1,val = nums[0];
        for(int i=1;i<nums.size();i++)
        {
            if(nums[i] == val) cnt++;
            else cnt--;
            if(cnt == 0)
            {
                val = nums[i];
                cnt=1;
            }
        }
        return val;
    }
};