Codeforces-SolutionsA/Codes/1957 A - Stickogon/1957A.cpp

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2024-04-22 04:25:22 +08:00
#include<bits/stdc++.h>
using namespace std;
#ifndef ONLINE_JUDGE
#include "Debug.h"
#else
#define dbg(...)
#endif
#define ll long long
#define ull unsigned long long
#define endl '\n'
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl
#define PI 3.141592653589793238
#define MOD 1000000007
#define FAST (ios_base:: sync_with_stdio(false),cin.tie(NULL));
ull mypow(ull a,ull b,ull m=MOD) {ull ans=1; a%=m; while(b){if(b&1) ans=(ans*a)%m; a=(a*a)%m; b>>=1;} return ans;}
void solve()
{
int n;
cin>>n;
map<int,int>m;
for(int i=0; i<n; ++i)
{
int x;
cin>>x;
m[x]++;
}
int ans=0;
for(auto x:m)
ans += x.ss/3;
cout<<ans<<endl;
}
signed main()
{
FAST;
int TC = 1;
cin >> TC;
while (TC--) solve();
}