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;
    ptr = new int;
    *ptr = code;
    cout << code;
    delete ptr;
    ptr = nullptr;
    if(ptr == nullptr)
        cout << " OK";
    else 
        cout << " NOT_OK";
    return 0;
}