func_code_string: #include <bits/stdc++.h>   using namespace std;   long long solve(int N, const vector<int>& A) {     long long res = 0;     vector<int> freq(32);     for (int x : A) {       int hsb = (sizeof(int) * 8 - 1 - __builtin_clz((x)));       res += freq[hsb];       ++freq[hsb];     }     return res;   }   int main(int argc, char* argv[]) {     ios_base::sync_with_stdio(false);     cin.tie(nullptr);     int TC;     cin >> TC;     for (int tc = (1), _b = (TC); tc <= _b; ++tc) {       int N;       cin >> N;       vector<int> A(N);       for (int i = 0, _n = (N); i < _n; ++i) cin >> A[i];       long long res = solve(N, A);       cout << res <<   n ;     }     return 0;   }   