Reset Fault Buffer

#include <iostream>
using namespace std;

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

    // Write your safe delete + pointer reset logic here
    int * ptr = new int(code);
    cout << *ptr << " ";
    delete ptr;
    ptr = nullptr;

    if(ptr == nullptr){
        cout << "OK" << endl;
    } else {
        cout << "NOT_OK" << endl;
    }

    return 0;
}

Solving Approach