#define WIN32_LEAN_AND_MEAN

#include <Windows.h>
#include <iostream>
using namespace std;


int main()
{
    HWND con_handle = GetConsoleWindow();
    if (!con_handle) return 0;

    HDC con_DC = GetDC(con_handle);
    if (!con_DC) return 0;

    int32_t radius = 0;

    while (radius <= 1)
        cin >> radius;
    cin.get();

    RECT window_size;
    if (!GetClientRect(con_handle, &window_size))
    {
        ReleaseDC(con_handle, con_DC);
        return 0;
    }

    
    int32_t x_mid = window_size.right / 2, y_mid = window_size.bottom / 2;
    Ellipse(con_DC, x_mid - radius, y_mid - radius, x_mid + radius, y_mid + radius);
    cin.get();

    ReleaseDC(con_handle, con_DC);
    return 0;
}