面试题59 - I. 滑动窗口的最大值

Posted 2020-11-29 ocpc

题目：

 

 

解答：

 1 class Solution {
 2 public:
 3     vector<int> maxSlidingWindow(vector<int>& nums, int k) 
 4     {
 5         if(nums.size() == 0 || k == 1)  
 6         {
 7             return nums;
 8         }
 9 
10         priority_queue<int> q;
11         map<int, int> maps;
12         vector<int> res;
13 
14         int i;
15         for(i = 0; i < k; i++)
16         {
17             q.push(nums[i]);
18         }
19 
20         while(true)
21         {
22             res.push_back(q.top());
23             if(i == nums.size())
24             {
25                 break;
26             }
27             
28             int add = nums[i];
29             int del = nums[i - k];
30             q.push(add);
31             maps[del]++;
32             i++;
33 
34             while(!q.empty() && maps[q.top()] > 0)
35             {
36                 maps[q.top()]--;
37                 q.pop();
38             }
39         }
40         return res;
41     }
42 };