29. 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\n";
    }
    else {
        cout<<"NOT_OK\n";
    }
    return 0;
}