Problem: Given a permutation p of length n, find its subsequence s_1, s_2, …, s_k of length at least 2 such that:

  * |s_1-s_2|+|s_2-s_3|+…+|s_{k-1}-s_k| is as big as possible over all subsequences of p with length at least 2. 
  * Among all such subsequences, choose the one whose length, k, is as small as possible. 



If multiple subsequences satisfy these conditions, you are allowed to find any of them.

A sequence a is a subsequence of an array b if a can be obtained from b by deleting some (possibly, zero or all) elements.

A permutation of length n is an array of length n in which every element from 1 to n occurs exactly once.

Input

The first line contains an integer t (1 ≤ t ≤ 2 ⋅ 10^4) — the number of test cases. The description of the test cases follows.

The first line of each test case contains an integer n (2 ≤ n ≤ 10^5) — the length of the permutation p.

The second line of each test case contains n integers p_1, p_2, …, p_{n} (1 ≤ p_i ≤ n, p_i are distinct) — the elements of the permutation p.

The sum of n across the test cases doesn't exceed 10^5.

Output

For each test case, the first line should contain the length of the found subsequence, k. The second line should contain s_1, s_2, …, s_k — its elements.

If multiple subsequences satisfy these conditions, you are allowed to find any of them.

Example

Input


2
3
3 2 1
4
1 3 4 2


Output


2
3 1 
3
1 4 2 

Note

In the first test case, there are 4 subsequences of length at least 2:

  * [3,2] which gives us |3-2|=1. 
  * [3,1] which gives us |3-1|=2. 
  * [2,1] which gives us |2-1|=1. 
  * [3,2,1] which gives us |3-2|+|2-1|=2. 



So the answer is either [3,1] or [3,2,1]. Since we want the subsequence to be as short as possible, the answer is [3,1].

Solution (in JAVA):

Solution:
import java.util.*;
import java.io.*;

public class Codeforces_1364_B {
	static FastReader sc;
	static PrintWriter pw;
	

	public static void main(String[] args) throws FileNotFoundException {
		boolean submit = true;
		sc = new FastReader(submit);
		pw=new PrintWriter(System.out);

		
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {

			solve();
			pw.flush();
		}
		
		pw.close();
		
	}

	static void solve() {
		// Solution
		int n=_int();
		int[] Arr=_int(n);
		ArrayList<Integer> A=new ArrayList<>();
		A.add(Arr[0]);
		for(int i=1;i<n-1;i++) {
			if((Arr[i]<Arr[i+1] && Arr[i]<Arr[i-1]) || (Arr[i]>Arr[i+1] && Arr[i]>Arr[i-1])) {
				A.add(Arr[i]);
			}
		}
		A.add(Arr[n-1]);
		Println(A.size());
		Print(A);
	}

	/*
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 * 
	 */

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader(boolean b) throws FileNotFoundException {
			if (b) {
				br = new BufferedReader(new InputStreamReader(System.in));
			} else {
				br = new BufferedReader(new FileReader("src/input.txt"));
			}

		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}

	static int _int() {
		return sc.nextInt();
	}

	static int[] _int(int n) {
		int[] Arr = new int[n];
		for (int i = 0; i < n; i++) {
			Arr[i] = sc.nextInt();
		}
		return Arr;
	}

	static int[][] _int(int m, int n) {
		int[][] Arr = new int[m][n];
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < n; j++) {
				Arr[i][j] = sc.nextInt();
			}
		}
		return Arr;
	}

	static long _long() {
		return sc.nextLong();
	}

	static long[] _long(int n) {
		long[] Arr = new long[n];
		for (int i = 0; i < n; i++) {
			Arr[i] = sc.nextLong();
		}
		return Arr;
	}

	static long[][] _long(int m, int n) {
		long[][] Arr = new long[m][n];
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < n; j++) {
				Arr[i][j] = sc.nextLong();
			}
		}
		return Arr;
	}

	static String _string() {
		return sc.next();
	}

	static String[] _string(int n) {
		String[] s = new String[n];
		for (int i = 0; i < n; i++) {
			s[i] = sc.next();
		}
		return s;
	}

	static char _char() {
		return sc.next().charAt(0);
	}

	static char[] _chars() {
		return sc.next().toCharArray();
	}

	static char[] _char(int n) {
		char[] c = new char[n];
		for (int i = 0; i < n; i++) {
			c[i] = sc.next().charAt(0);
		}
		return c;
	}

	static char[][] _chars(int n) {
		char[][] C = new char[n][];
		for (int i = 0; i < n; i++) {
			C[i] = _chars();
		}
		return C;
	}

	static char[][] _char(int m, int n) {
		char[][] C = new char[m][n];
		for (int i = 0; i < m; i++) {
			for (int j = 0; j < n; j++) {
				C[m][n] = sc.next().charAt(0);
			}
		}
		return C;
	}

	static int max(int m, int n) {
		return m > n ? m : n;
	}

	static int min(int m, int n) {
		return m < n ? m : n;
	}

	static long max(long m, long n) {
		return m > n ? m : n;
	}

	static long min(long m, long n) {
		return m < n ? m : n;
	}

	static int max(Iterable<Integer> A) {
		int ans = Integer.MIN_VALUE;
		for (int i : A) {
			if (i > ans) {
				ans = i;
			}
		}
		return ans;
	}

	static int min(Iterable<Integer> A) {
		int ans = Integer.MAX_VALUE;
		for (int i : A) {
			if (i < ans) {
				ans = i;
			}
		}
		return ans;
	}

	static int max(int[] A) {
		int ans = Integer.MIN_VALUE;
		for (int i : A) {
			if (i > ans) {
				ans = i;
			}
		}
		return ans;
	}

	static int min(int[] A) {
		int ans = Integer.MAX_VALUE;
		for (int i : A) {
			if (i < ans) {
				ans = i;
			}
		}
		return ans;
	}

	static void Println() {
		pw.println();
	}

	static void Print(long x) {
		pw.print(x);
	}

	static void Println(long x) {
		pw.println(x);
	}

	static void Print(String s) {
		pw.print(s);
	}

	static void Println(String s) {
		pw.println(s);
	}

	static void Println(String[] A) {
		for (String s : A) {
			pw.println(s);
		}
	}

	static void Print(String[] A) {
		for (String s : A) {
			pw.print(s + " ");
		}
		pw.println();
	}

	static void Print(int[] A) {
		for (int i : A) {
			pw.print(i + " ");
		}
		pw.println();
	}
	
	static void Print(List<Integer> A) {
		for (int i : A) {
			pw.print(i + " ");
		}
		pw.println();
	}

	static void Println(int[] A) {
		for (int i : A) {
			pw.println(i);
		}
	}

	static void Println(int[][] A) {
		for (int[] a : A) {
			for (int i : a) {
				pw.print(i + " ");
			}
			pw.println();
		}
	}

	static void Sort(int[] A) {
		Arrays.sort(A);
	}

	static void Sort(List<Integer> A) {
		Collections.sort(A);
	}

	static void Sortr(int[] A) {
		Arrays.sort(A);
		reverse(A);
	}

	static void reverse(int[] A) {
		int n = A.length;
		if (n < 2)
			return;
		int temp;
		for (int i = 0; i < n / 2; i++) {
			temp = A[i];
			A[i] = A[n - i - 1];
			A[n - i - 1] = temp;
		}
	}

	static void Sortr(List<Integer> A) {
		Collections.sort(A, Collections.reverseOrder());
	}

}