239.

Sliding Window Maximum

Hard

You are given an array of integers nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see the k numbers in the window. Each time the sliding window moves right by one position. Return the max sliding window. Example 1: Input: nums = [1,3,-1,-3,5,3,6,7], k = 3 Output: [3,3,5,5,6,7] Explanation: Window position Max --------------- ----- [1 3 -1] -3 5 3 6 7 3 1 [3 -1 -3] 5 3 6 7 3 1 3 [-1 -3 5] 3 6 7 5 1 3 -1 [-3 5 3] 6 7 5 1 3 -1 -3 [5 3 6] 7 6 1 3 -1 -3 5 [3 6 7] 7 Example 2: Input: nums = [1], k = 1 Output: [1] Example 3: Input: nums = [1,-1], k = 1 Output: [1,-1] Example 4: Input: nums = [9,11], k = 2 Output: [11] Example 5: Input: nums = [4,-2], k = 2 Output: [4] Constraints: 1 <= nums.length <= 105 -104 <= nums[i] <= 104 1 <= k <= nums.length