#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <queue>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
static const double PI2 = 8.0 * atan(1.0);

#define REP(i,n)	for(int i=0;i<(int)n;++i)
#define ALL(c)		(c).begin(),(c).end()
#define CLEAR(v)	memset(v,0,sizeof(v))
#define MP(a,b)		make_pair((a),(b))
#define ABS(a)		((a)>0?(a):-(a))
#define FOR(i,s,n)	for(int i=s;i<(int)n;++i)

int N;
int L[100];
vector<int> cnt;

void solve() {
	cin >> N;
	REP(i, N) cin >> L[i];
	sort(L, L + N);
	cnt.clear();
	int c = 0;
	priority_queue<int> q;
	FOR(i, 1, N) {
		++c;
		if (L[i] == L[i - 1]) continue;
		q.push(c);
		c = 0;
	}
	q.push(++c);
	int res = 0;
	while (q.size() >= 3) {
		int a[3];
		REP(i, 3) {
			a[i] = q.top(); q.pop();
		}
		++res;
		REP(i, 3) if (a[i] >= 2) q.push(a[i] - 1);
	}
	cout << res << endl;
}

int main(int argc, char **argv) {
	int T;
	cin >> T;
	REP(i, T) solve();
	return 0;
}