func_code_string: #include <bits/stdc++.h>   using namespace std;   long long check(long long x) {     long long i = 0, ans = 0;     while (x > 0) {       if ((x & (1)) == 1) {         ans = max(ans, i);       }       x = x >> 1;       i++;     }     return ans;   }   void solve() {     long long n;     cin >> n;     long long a[n + 1];     map<long long, long long> mp;     for (long long i = 0; i < n; i++) {       cin >> a[i];       mp[check(a[i])]++;     }     long long ans = 0;     for (auto x : mp) {       if (x.second > 1) ans += ((x.second) * (x.second - 1)) / 2;     }     cout << ans << endl;     return;   }   int main() {     int t;     cin >> t;     while (t--) {       solve();     }   }   