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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const long long int hell = (long long int)(1e18 + 100LL);
int main() {
  long long int t, i, j, k, m, n, x, y;
  t = 1;
  cin >> t;
  while (t--) {
    long long int flag = 0;
    cin >> n;
    vector<long long int> ar(n, 0);
    for (i = 0; i < n; i++) {
      cin >> x;
      ar[i] = x;
    }
    vector<long long int> V;
    if (ar[0] < ar[1]) {
      x = 0;
    } else {
      x = 1;
    }
    y = ar[0];
    V.push_back(ar[0]);
    for (i = 1; i < n; i++) {
      if (ar[i - 1] < ar[i]) {
        if (x == 0) {
          continue;
        } else {
          V.push_back(ar[i - 1]);
          x = 0;
        }
      } else {
        if (x == 1) {
          continue;
        } else {
          V.push_back(ar[i - 1]);
          x = 1;
        }
      }
    }
    if (V[V.size() - 1] != ar[n - 1]) {
      V.push_back(ar[n - 1]);
    }
    cout << V.size() << "\n";
    for (auto it : V) {
      cout << it << " ";
    }
    cout << "\n";
  }
  return 0;
}