Counting ones

input/code.cpp: In function 'int main()':
input/code.cpp:24:43: warning: array subscript 2 is outside array bounds of 'uint64_t [1]' {aka 'long unsigned int [1]'} [-Warray-bounds]
   24 |                         __builtin_popcount(*((uint32_t*)(p+1)));
      |                         ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
input/code.cpp:21:22: note: while referencing 'r'
   21 |             uint64_t r = x[i] * x[j];
      |                      ^

#include <bits/stdc++.h>

using namespace std;

int main() {

    // ios_base::sync_with_stdio(0);

    int n;
    cin >> n;

    vector<uint64_t> x(n);
    for (int k = 0; k < n; k++)
        cin >> x[k];
    
    int a = 0, b = 0;
    int max = 0;

    for (int i = 0; i < n; i++) {
        for (int j = i+1; j < n; j++) {
            uint64_t r = x[i] * x[j];
            uint64_t *p = &r;
            int count = __builtin_popcount(*((uint32_t*)p)) +
                        __builtin_popcount(*((uint32_t*)(p+1)));
            if (count > max) {
                max = count;
                a = i;
                b = j;
            }
        }
    }

    cout << max << "\n" << x[a] << " " << x[b] << "\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