func_code_string: #include <bits/stdc++.h>   using namespace std;   template <class c>   struct rge {     c b, e;   };   template <class c>   rge<c> range(c i, c j) {     return rge<c>{i, j};   }   template <class c>   auto dud(c* x) -> decltype(cerr << *x, 0);   template <class c>   char dud(...);   struct debug {     template <class c>     debug& operator<<(const c&) {       return *this;     }   };   template <class T>   void clr(T& a, int n) {     a.clear();     a.resize(n + 1);   }   void solve();   const int N = 2e5 + 10;   const int INF = 1e9;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t = 1;     while (t--) {       solve();     }   }   int n;   void solve() {     cin >> n;     vector<long long> a(n + 1);     for (int i = int(1); i <= int(n); i++) {       cin >> a[i];     }     const int B = 20;     vector<long long> count(B + 1);     for (int i = int(1); i <= int(n); i++) {       for (int j = int(0); j <= int(B); j++) {         long long mask = (1ll << j);         count[j] += (mask & a[i] ? 1 : 0);       }     }     debug() <<   [              <<  count                  :               << (count) <<  ]  ;     long long ans = 0;     for (int i = int(1); i <= int(n); i++) {       long long curr = 0;       for (int j = int(0); j <= int(B); j++) {         if (count[j] == 0) continue;         curr += (1ll << j);         count[j]--;       }       ans += curr * curr;     }     cout << ans <<   n ;   }   