题解 | #数组中出现次数超过一半的数字#
数组中出现次数超过一半的数字
https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163
class Solution {
public:
int MoreThanHalfNum_Solution(vector<int> numbers) {
unordered_map<int,int> m;
int n = numbers.size();
for(int i = 0;i<n;++i)
{
m[numbers[i]]++;
if(m[numbers[i]] > n/2)
return numbers[i];
}
return -1;
}
};
思路：使用哈希表