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.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;

public class Problem649B {
	public static void main(String[] args) throws Exception {
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter writer = new PrintWriter(System.out);

		int t = Integer.parseInt(reader.readLine());
		for (int tt = 0; tt < t; tt++) {
			StringTokenizer tokenizer = new StringTokenizer(reader.readLine());
			int n = Integer.parseInt(tokenizer.nextToken());
			int[] a = new int[n];
			StringTokenizer aT = new StringTokenizer(reader.readLine());
			for (int i = 0; i < n; i++) {
				a[i] = Integer.parseInt(aT.nextToken());
			}

			int[] diffs = new int[n - 1];
			for (int i = 0; i < n - 1; i++) {
				int diff = a[i] - a[i + 1];
				diffs[i] = diff;
			}
			List<Integer> out = new ArrayList<>();
			out.add(a[0]);
			for (int i = 0; i < diffs.length - 1; i++) {
				if (diffs[i] < 0 != diffs[i + 1] < 0) {
					// include
					out.add(a[i + 1]);
				}
			}
			out.add(a[n - 1]);
			writer.println(out.size());
			for (int i = 0; i < out.size() - 1; i++) {
				writer.print(out.get(i));
				writer.print(' ');
			}
			writer.println(out.get(out.size() - 1));


		}

		reader.close();
		writer.close();
	}
}