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;
    *ptr = code;
    cout<<*ptr<<" ";
    delete ptr;
    ptr = nullptr;
    (ptr == nullptr)?cout<<"OK":cout<<"NOT_OK";

    return 0;
}

Solving Approach