940a.cpp

// Neepan Biswas
// neepanb ~ codeforces
#include<bits/stdc++.h>
using namespace std;

using lli = long long int;
using ch = char;
using str=string;
using ld = long double;
using pi = pair<lli,lli>;
using vp = vector<pi>;
using vi = vector<lli>;
using vs = vector<str>;
using vc = vector<ch>;
using bl =bool;
using mp=map<lli,lli>;
using ump=unordered_map<lli,lli>;

#define fr(i,x,n) for (lli i=(x);i<=n;i++)
#define fr1(i,x,n) for (lli i = n; i>=(x); i--)
#define pb push_back
#define eb emplace_back
#define sz(x) (lli)x.size()
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define debug(x) cout << '>' << #x << ':' << x << endl;
#define cd(condition, value_if_true, value_if_false) ((condition) ? (value_if_true) : (value_if_false))

#pragma GCC optimize("unroll-loops,O3,Ofast")
#pragma GCC target("avx2,avx,fma,bmi,bmi2,lzcnt,popcnt")

// Global matrix to prevent stack overflow
// const lli MAX_N = 1000; // Adjust based on constraints
// vector<vector<lli>> a(MAX_N, vector<lli>(MAX_N));


int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	lli t;
	cin>>t;

	while(t--){
		lli n;
		cin>>n;
		vi a(n);
		fr(i,0,n-1)cin>>a[i];

		mp mpp;
		for(auto it: a){
			mpp[it]++;
		}

		lli cnt=0;
		for(auto x: mpp){
			if(x.ss >= 3){
				cnt+=floor(double(x.ss)/3);
			}
		}
		cout<<cnt<<endl;

	}
	return 0;
}