Reset Fault Buffer

#include <iostream>
using namespace std;

int main() {
    int code;
    cin >> code;

    // Write your safe delete + pointer reset logic here

    int* buffer = new int;
    *buffer = code;
    cout << *buffer;
    delete buffer;
    buffer = nullptr;

    if ( buffer == nullptr) cout << " OK";
    else cout << " NOT_OK";
    return 0;
}

Solving Approach