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;
int main() {
  int t;
  cin >> t;
  while (t--) {
    long long n, sum = 0;
    vector<long long> ans;
    cin >> n;
    long long a[n];
    for (long long i = 0; i < (n); ++i) {
      cin >> a[i];
      if (i != 0) sum += abs(a[i] - a[i - 1]);
    }
    long long ch = (a[1] - a[0] >= 0 ? 1 : 0);
    ans.push_back(a[0]);
    ans.push_back(a[1]);
    for (long long i = 2; i < (n); ++i) {
      if (a[i] >= a[i - 1]) {
        if (ch == 1) ans.pop_back();
        ans.push_back(a[i]);
        ch = 1;
      }
      if (a[i] < a[i - 1]) {
        if (ch == 0) ans.pop_back();
        ans.push_back(a[i]);
        ch = 0;
      }
    }
    cout << ans.size() << '\n';
    for (auto x : ans) cout << x << " ";
    cout << '\n';
  }
}