Counting ones

input/code.cpp: In function 'int main()':
input/code.cpp:27:7: warning: 'max' may be used uninitialized [-Wmaybe-uninitialized]
   27 |       if(ones > max){
      |       ^~
input/code.cpp:22:6: note: 'max' was declared here
   22 |   ll max, n1, n2;
      |      ^~~
In file included from /usr/include/c++/13/iostream:41,
                 from input/code.cpp:1:
In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]',
    inlined from 'int main()' at input/code.cpp:35:11:
/usr/include/c++/13/ostream:204:25: warning: 'n1' may be used uninitialized [-Wmaybe-uninitialized]
  204 |       { return _M_insert(__n); }
      |                ~~~~~~~~~^~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:22:11: note: 'n1' was declared here
   22 |   ll max, n1, n2;
      |           ^~
In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_ty...

#include <iostream>
#include <vector>
#include <bitset>

using namespace std;

typedef long long ll;
typedef vector<long long> vll; 

int main()
{
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;

  cin >> n;

  vll a(n);

  for(auto& x : a) cin >> x;

  ll max, n1, n2;

  for(int i = 0; i < n; i++){
    for(int j = i+1; j < n; j++){
      ll ones = __builtin_popcountll(a[i] * a[j]);
      if(ones > max){
        max = ones;
        n1 = a[i];
        n2 = a[j];
      }
    }
  }
  cout << max << "\n";
  cout << n1 << " " << n2 << "\n";
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER