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

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int test = 1;
    cin >> test;
    while (test--)
    {
        int n;
        cin >> n;
        int even = 0, odd = 0;
        for (int i=0; i<n; ++i) {
            int in ;
            cin >> in;
            if (in % 2 == 1) odd++;
            else even++;
        }
        if (odd % 2 == 1)
        {
            cout << even << "\n";
            continue;
        }
        cout << min(even, odd / 2) << "\n";
    }
    return 0;
}