#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin >> t;
while (t--) {
int n;
cin >> n;
vector<int> cnt(33);
for (int i = 0; i < n; i++) {
unsigned long long x;
cin >> x;
int len = 64 - __builtin_clzll(x);
cnt[len]++;
}
cout << *max_element(cnt.begin(), cnt.end()) << '\n';
}
}
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