05. Snowflake

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int n;
    cin >> n;
    int height = n * 2 + 1;
    int width = 2 * n + 3;

    int number_of_inner_dots = n;

    //First half
    for (int row = 0; row < n - 1; row++)
    {
        int number_of_outer_dots = row;
        cout
            << string(number_of_outer_dots, '.')
            << "*"
            << string(number_of_inner_dots, '.')
            << "*"
            << string(number_of_inner_dots, '.')
            << "*"
            << string(number_of_outer_dots, '.')
            << endl;
        number_of_inner_dots--;
    }

    //Middle
    int middle_outer_dots = (width - 5) / 2;
    cout
        << string(middle_outer_dots, '.')
        << string(5, '*')
        << string(middle_outer_dots, '.')
        << endl;
    cout << string(width, '*') << endl;
    cout
        << string(middle_outer_dots, '.')
        << string(5, '*')
        << string(middle_outer_dots, '.')
        << endl;

    //Second half
    for (int row = n-2; row >= 0; row--)
    {
        number_of_inner_dots++;
        int number_of_outer_dots = row;
        cout
            << string(number_of_outer_dots, '.')
            << "*"
            << string(number_of_inner_dots, '.')
            << "*"
            << string(number_of_inner_dots, '.')
            << "*"
            << string(number_of_outer_dots, '.')
            << endl;
    }
    return 0;
}