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.
思路1:
使用map来处理。
class Solution {
public:
int majorityElement(vector<int>& nums) {
map<int, int> record;
for (int i = 0; i < nums.size(); i++)
{
if (record.find(nums[i]) == record.end())
{
record.insert(pair<int, int>(nums[i], 1));
if (record[nums[i]] > nums.size() / 2)
{
return nums[i];
}
}
else
{
record[nums[i]] += 1;
if (record[nums[i]] > nums.size() / 2)
{
return nums[i];
}
}
}
return 0;
}
};
思路2:
采用双循环
int majorityElement(vector<int>& nums) {
int hit = 0;
int currentElem;
for (int i = 0; i < nums.size(); i++)
{
currentElem = nums[i];
hit = 0;
for (int j = 0; j < nums.size(); j++)
{
if (nums[j] == currentElem)
{
hit++;
if (hit > nums.size() / 2)
{
return currentElem;
}
}
}
}
return 0;
}
2016-08-10 12:19:37
亿速云「云服务器」,即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘,价格低至29元/月。点击查看>>
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。