题解 | #滑动窗口的最大值#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param num int整型一维数组 
     * @param size int整型 
     * @return int整型ArrayList
     */
    public ArrayList<Integer> maxInWindows (int[] num, int size) {
        // write code here
        ArrayList<Integer> res = new ArrayList<>();
        if(num.length<size||size==0){
            return res;
        }
        
        Deque<Integer> window = new LinkedList<>();
        int max = 0;
        for(int i = 0; i < size; i++){
            window.offer(num[i]);
            max = Math.max(max,num[i]);
        }
        res.add(max);
        int a;
        int b;
        for(int i = size; i < num.length; i++){
            a = num[i];
            window.offer(a);
            b = window.poll();
            System.out.println(a + " " + b);
            if(a>=max){
                max = a;
            }else if(b < max){
                
            }else{
                max=0;
                for(int j = i-size+1; j <= i; j++){
                    max = Math.max(max,num[j]);
                    System.out.print(num[j]+" ");
                }
                System.out.println();
            }
            res.add(max);
        }
        return res;
    }
}