剑指offer-滑动窗口的最大值

62.滑动窗口的最大值

题目内容：

代码及思路：

#include
#include
#include
using namespace std;
class Solution {
public:
	vector maxwindow(vector nums,int k)
	{
		vector maxwindow;
		if (nums.size() < k)
			return maxwindow;
		//设计一个队列用来存放可能为最大值的下标
		deque index;
		for (int i = 0; i < k; i++)
		{
			if (!index.empty() && nums[i] >nums[index.back()])
				index.pop_back();
			index.push_back(i);
		}
		for (int j = k; j < nums.size(); j++)
		{
			maxwindow.push_back(nums[index.front()]);//队列头存放着最大值
			while (!index.empty() && nums[j] >=nums[index.back()])
				index.pop_back();
			if (!index.empty() && (j - index.front()) >= k)
				index.pop_front();
			index.push_back(j);
		}
		maxwindow.push_back(nums[index.front()]);
		return maxwindow;
	}
};
void main()
{
	Solution* object = new Solution();
	vector l1;
	int number;
	char ch;
	do
	{
		cin >> number;
		l1.push_back(number);
		cin.get(ch);
	} while (ch == ',');
	int k;
	cin >> k;
	vector res = object->maxwindow(l1, k);
}