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

Solving Approach