fork download 
  1. #include <vector>
  2. #include <deque>
  3. #include <iostream>
  4.  
  5. std::vector<int> maxSlidingWindow(std::vector<int>& nums, int k) {
  6.     std::vector<int> result;
  7.     std::deque<int> dq;
  8.  
  9.     if (nums.empty()) return result; // Handle the case when nums is empty
  10.  
  11.     for (int i = 0; i < nums.size(); ++i) {
  12.         // Remove indices from the front of the deque if they are outside the current window
  13.         while (!dq.empty() && dq.front() <= i - k) {
  14.             dq.pop_front();
  15.         }
  16.  
  17.         // Remove indices from the back of the deque if the corresponding elements in nums are smaller than or equal to nums[i]
  18.         while (!dq.empty() && nums[dq.back()] <= nums[i]) {
  19.             dq.pop_back();
  20.         }
  21.  
  22.         dq.push_back(i);
  23.  
  24.         // Add the maximum element to the result when the window size reaches k
  25.         if (i >= k - 1) {
  26.             result.push_back(nums[dq.front()]);
  27.         }
  28.     }
  29.  
  30.     return result;
  31. }
  32.  
  33. int main() {
  34.     std::vector<int> nums1 = {1,3,-1,-3,5,3,6,7};
  35.     int k1 = 3;
  36.     std::vector<int> result1 = maxSlidingWindow(nums1, k1);
  37.     std::cout << "Output for Example 1: ";
  38.     for (int num : result1) {
  39.         std::cout << num << " ";
  40.     }
  41.     std::cout << std::endl;
  42.  
  43.     std::vector<int> nums2 = {1};
  44.     int k2 = 1;
  45.     std::vector<int> result2 = maxSlidingWindow(nums2, k2);
  46.     std::cout << "Output for Example 2: ";
  47.     for (int num : result2) {
  48.         std::cout << num << " ";
  49.     }
  50.     std::cout << std::endl;
  51.  
  52.     return 0;
  53. }
  54.  
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
Standard input is empty
stdout 
Output for Example 1: 3 3 5 5 6 7 
Output for Example 2: 1
https://ideone.com/kkwboi
language:
C++ (gcc 8.3)
created:
13 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!