题目
也可参考：剑指offer——面试题65：滑动窗口的最大值

class Solution {public int[] maxSlidingWindow(int[] nums, int k) {int[] res = new int[nums.length - k + 1];Deque<Integer> q = new LinkedList<>();int inx = 0;while (inx < k) {if (q.isEmpty()) {q.offerLast(nums[inx++]);} else {while (!q.isEmpty() && q.peekLast() < nums[inx]) {q.pollLast();}q.offerLast(nums[inx++]);}}res[0] = q.peekFirst(); // inx - kwhile (inx < nums.length) {int d = nums[inx - k];if (q.peekFirst() == d) {q.pollFirst();}while (!q.isEmpty() && q.peekLast() < nums[inx]) {q.pollLast();}q.offerLast(nums[inx++]);res[inx - k] = q.peekFirst();}return res;}
}