Yes its safe and according to site&#x27;s terms of use <a href="https:&#x2F;&#x2F;www.programmingalgorithms.com&#x2F;terms-of-use" rel="nofollow">https:&#x2F;&#x2F;www.programmingalgorithms.com&#x2F;terms-of-use</a>
you can can use it anywhere