Counting ones

input/code.cpp: In function 'int main()':
input/code.cpp:25:35: warning: 'b1' may be used uninitialized [-Wmaybe-uninitialized]
   25 |     cout << best << '\n' << b1 << ' ' << b2 << '\n';
      |                                   ^~~
input/code.cpp:13:9: note: 'b1' was declared here
   13 |     int b1, b2, best=0;
      |         ^~
input/code.cpp:25:48: warning: 'b2' may be used uninitialized [-Wmaybe-uninitialized]
   25 |     cout << best << '\n' << b1 << ' ' << b2 << '\n';
      |                                                ^~~~
input/code.cpp:13:13: note: 'b2' was declared here
   13 |     int b1, b2, best=0;
      |             ^~

#include <iostream>
#include <vector>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> arr(n);
    for (int i=0;i<n;i++){
        cin >> arr[i];
    }
    int b1, b2, best=0;
    for (int i=0;i<n;i++){
        for (int j=i+1;j<n;j++){
            int prod=arr[i]*arr[j];
            int cnt=__builtin_popcount(prod);
            if (cnt>best){
                best=cnt;
                b1=arr[i];
                b2=arr[j];
            }
        }
    }
    cout << best << '\n' << b1 << ' ' << b2 << '\n';
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

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