unique_ptr RAII Basics

#include <iostream>
#include <memory>
using namespace std;

int main() {
    int N;
    cin >> N;

    {
        // Declare a unique_ptr to manage a dynamic integer buffer
        unique_ptr<int[]> ptr(new int[N]);
        // Allocate memory for N integers
        for (int i = 0; i < N; i++) {
            int temp;
            cin >> temp;
            // Store value in the buffer
            ptr[i] = temp;
        }

        for (int i = 0; i < N; i++) {
            // Print buffer values
            cout << static_cast<int>(ptr[i]);
            if (i != N - 1) cout << " ";
        }
        cout << endl;
    }

    cout << "Scope ended" << endl;
    return 0;
}

Solving Approach