LeetCode – Sliding Window Maximum (Java)

 

Given an array 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.

Java Solution

sliding-window-maximum

public int[] maxSlidingWindow(int[] nums, int k) {
    if(nums==null||nums.length==0)
        return new int[0];
 
    int[] result = new int[nums.length-k+1];
 
    LinkedList<Integer> deque = new LinkedList<Integer>();
    for(int i=0; i<nums.length; i++){
        if(!deque.isEmpty()&&deque.peekFirst()==i-k) 
            deque.poll();
 
        while(!deque.isEmpty()&&nums[deque.peekLast()]<nums[i]){
            deque.removeLast();
        }    
 
        deque.offer(i);
 
        if(i+1>=k)
            result[i+1-k]=nums[deque.peek()];
    }
 
    return result;
}

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  4. LeetCode – Minimum Window Substring (Java)
Category >> Algorithms  
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  1. Hooman on 2016-8-25

    PriorityQueue solution:
    https://gist.github.com/hmny/94e285b834ed8ed34a8f6fbf29067981

  2. Abhishek Nandgaonkar on 2016-9-4

    Can someone add a better description for the question

  3. Ankit Shah on 2016-12-29

    Leetcode accepted soluton is here:
    https://github.com/ankit249/Algorithms/blob/master/src/com/ds/heap/SlidingWindowMaximum.java

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