import java.util.*;
import java.io.*;
public class Main{
    public static void main(String [] args) throws Exception{
        Scanner sc=new Scanner(System.in);
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String [] str=br.readLine().split(" ");
        int n=Integer.parseInt(str[0]);
        int k=Integer.parseInt(str[1]);
        LinkedList<Integer> dq=new LinkedList<>();
        int [] arr=new int[n+1];
        str=br.readLine().split(" ");
        for(int i = 0;i<n;i++) arr[i]=Integer.parseInt(str[i]);
        for(int i = 0;i<n;i++){
            if(!dq.isEmpty()&&i-k+1>dq.peekFirst()) dq.pollFirst();
            while(!dq.isEmpty()&&arr[i]<=arr[dq.peekLast()]) dq.pollLast();
            dq.addLast(i);
            if(i>=k-1) System.out.print(arr[dq.peekFirst()]+" ");
        }
        System.out.println();
        dq.clear();
        for(int i = 0;i<n;i++){
            if(!dq.isEmpty()&&i-k+1>dq.peekFirst()) dq.pollFirst();
            while(!dq.isEmpty()&&arr[i]>=arr[dq.peekLast()]) dq.pollLast();
            dq.addLast(i);
            if(i>=k-1) System.out.print(arr[dq.peekFirst()]+" ");
        }
    }
}