1957A - Stickogon - CodeForces Solution

def solve():
    
    n = int(input())
    nums = list(map(int, input().split()))
    mp = {}
    for i in nums:
        if i in mp: mp[i] += 1
        else: mp[i] = 1

    ans = 0
    for i in mp: ans += mp[i] // 3
    print(ans)

t = int(input())

for _ in range(t):
    solve()