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;
    if(ptr==nullptr)
    {
        cout << "OK" << endl;   
    }
    else
    {
        cout << "NOT_OK" << endl;
    }
    return 0;
}

Solving Approach