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;
void printAll(int n, ...) {
  if (1) {
    va_list ap;
    va_start(ap, n);
    for (int i = 1; i <= n; i++) cout << va_arg(ap, long long int) << " ";
    cout << endl;
    va_end(ap);
  }
}
template <typename T>
string toString(T n) {
  stringstream ss;
  ss << n;
  string s;
  ss >> s;
  return s;
}
void init() {
  cout << fixed << setprecision(0);
  ios_base::sync_with_stdio(false);
  cin.tie(0);
}
bool isInteger(double n) {
  if (n - (long long int)n == 0)
    return true;
  else
    return false;
}
int main() {
  init();
  long long int i, j, k;
  long long int t = 1;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> ara(n);
    for (int i = 0; i < n; i++) cin >> ara[i];
    bool inc = (ara[1] - ara[0] > 0 ? true : false);
    vector<int> ans;
    ans.push_back(ara[0]);
    for (i = 2; i < n; i++) {
      if ((inc && ara[i] - ara[i - 1] < 0) ||
          (!inc && ara[i] - ara[i - 1] > 0)) {
        inc = !inc;
        ans.push_back(ara[i - 1]);
      }
    }
    ans.push_back(ara[n - 1]);
    cout << ans.size() << endl;
    {
      if (1) {
        for (auto a : ans) cout << a << " ";
        cout << endl;
      }
    };
  }
  return 0;
}