#include <bits/stdc++.h>
using namespace std;

int main() {
    int T;
    cin >> T;
    while (T --> 0) {
        int n;
        cin >> n;
        vector<int> a(n);
        for (int i = 0; i < n; ++i) cin >> a[i];
        sort(a.begin(), a.end());
        vector<int> b;
        for (int i = 0; i < n; i++) {
            if (i == 0 || a[i] != a[i - 1]) {
                b.emplace_back(a[i]);
            }
        }
        for (int i = 0; i < n; i++) {
            if (i > 0 && a[i] == a[i - 1]) {
                b.emplace_back(a[i]);
            }
        }
        for (auto x : b) cout << x << ' ';
        cout << '\n';
    }
    return 0;
}

//sus
#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin >> t;
    while (t--) {
        int n, m;
        cin >> n >> m;
        map<int, int> cnt;
        while (n--) {
            int x;
            cin >> x;
            cnt[x % m]++;
        }
        int ans = 0;
        for (auto &c : cnt) {
            if (c.first == 0) ans++;
            else if (2 * c.first == m) {
                ans++;
            } else if (2 * c.first < m || cnt.find(m - c.first) == cnt.end()) {
                int x = c.second, y = cnt[m - c.first];
                ans += 1 + max(0, abs(x - y) - 1);
            }
        }
        cout << ans << '\n';
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main() {
    int T;
    cin >> T;
    while (T --> 0) {
        int n, k;
        cin >> n >> k;
        if (n % 2) cout << 1 << ' ' << n / 2 << ' ' << n / 2 << '\n';
        else if (n % 2 == 0 && n % 4) cout << 2 << ' ' << n / 2 - 1 << ' ' << n / 2  - 1 << '\n';
        else cout << n / 2 << ' ' << n / 4 << ' ' << n / 4 << '\n';
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

vector<int> solve3(int n) {
    if (n % 2 == 1) return {1, n / 2, n / 2};
    if (n % 4 == 0) return {n / 2, n / 4, n / 4};
    if (n % 2 == 0) return {2, n / 2 - 1, n / 2 - 1};
}

int main() {
    int T;
    cin >> T;
    while (T --> 0) {
        int n, k;
        cin >> n >> k;
        vector<int> added = solve3(n - k + 3);
        for (int i = 0; i < k; ++i) {
            cout << (i <3 ? added[i] : 1) << ' '; // <3
        }
        cout << '\n';
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main() {
    int T;
    cin >> T;
    while (T --> 0) {
        int n;
        cin >> n;
        vector<long long> s(n), tag(n), dp(n, 0);
        for (int i = 0; i < n; ++i) cin >> tag[i];
        for (int i = 0; i < n; ++i) cin >> s[i];
        for (int j = 1; j < n; ++j) {
            for (int i = j - 1; i >= 0; --i) {
                if (tag[i] == tag[j]) continue;
                long long dpi = dp[i], dpj = dp[j], p = abs(s[i] - s[j]);
                dp[i] = max(dp[i], dpj + p);
                dp[j] = max(dp[j], dpi + p);
            }
        }
        cout << *max_element(dp.begin(), dp.end()) << '\n';
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

const int MAXA = 1e7;

vector<int> primes;
int mind[MAXA + 1];

int main() {

    for (int i = 2; i <= MAXA; ++i) {
        if (mind[i] == 0) {
            primes.emplace_back(i);
            mind[i] = i;
        }
        for (auto &x : primes) {
            if (x > mind[i] || x * i > MAXA) break;
            mind[x * i] = x;
        }
    }
    
    int T;
    cin >> T;
    while (T --> 0) {
        int n, k;
        cin >> n >> k;
        vector<int> a(n, 1);
        for (int i = 0; i < n; ++i) {
            int x;
            cin >> x;
            int cnt = 0, last = 0;
            while (x > 1) {
                int p = mind[x];
                if (last == p) {
                    ++cnt;
                } else {
                    if (cnt % 2 == 1) a[i] *= last;
                    last = p;
                    cnt = 1;
                }
                x /= p;
            }
            if (cnt % 2 == 1) a[i] *= last;
        }
        
        int L = 0, ans = 1;
        map<int, int> last;
        for (int i = 0; i < n; ++i) {
            if (last.find(a[i]) != last.end() && last[a[i]] >= L) {
                ++ans;
                L = i;
            }
            last[a[i]] = i;
        }
        cout << ans << '\n';
    }
    
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

const int INF = 1e9 + 1;
const int MAXA = 1e7;
vector<int> primes;
int mind[MAXA + 1];

int main() {
    for (int i = 2; i <= MAXA; ++i) {
        if (mind[i] == 0) {
            primes.emplace_back(i);
            mind[i] = i;
        }
        for (auto &x : primes) {
            if (x > mind[i] || x * i > MAXA) break;
            mind[x * i] = x;
        }
    }
    vector<int> cnt(MAXA + 1);
    int t;
    cin >> t;
    while (t--) {
        int n, k;
        cin >> n >> k; // уже k манулов
        vector<int> a(n, 1);
        for (int i = 0; i < n; ++i) {
            int x;
            cin >> x;
            int cnt = 0, last = 0;
            while (x > 1) {
                int p = mind[x];
                if (last == p) {
                    ++cnt;
                } else {
                    if (cnt % 2 == 1) a[i] *= last;
                    last = p;
                    cnt = 1;
                }
                x /= p;
            }
            if (cnt % 2 == 1) a[i] *= last;
        }
        vector<vector<int>> mnleft(n, vector<int>(k + 1));
        for (int j = 0; j <= k; j++) {
            int l = n, now = 0;
            for (int i = n - 1; i >= 0; i--) {
                while (l - 1 >= 0 && now + (cnt[a[l - 1]] > 0) <= j) {
                    l--;
                    now += (cnt[a[l]] > 0);
                    cnt[a[l]]++;
                }
                mnleft[i][j] = l;
                if (cnt[a[i]] > 1) now--;
                cnt[a[i]]--;
            }
        }
        vector<vector<int>> dp(n + 1, vector<int>(k + 1, INF));
        for (auto &c : dp[0]) c = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j <= k; j++) {
                if (j > 0) dp[i][j] = dp[i][j - 1];
                for (int lst = 0; lst <= j; lst++) {
                    dp[i][j] = min(dp[i][j], dp[mnleft[i - 1][lst]][j - lst] + 1);
                }
            }
        }
        int ans = INF;
        for (auto &c : dp.back()) ans = min(ans, c);
        cout << ans << "\n";
    }
    return 0;
}