如何在pdf中下载hackerrank问题？

When we open up a problem on http:www.hackerrank.com, there is an option to download the problem in pdf format. Here I want to download all the hackerrank problems from algorithm domain. It will take near about 3-4 hours if I download them all one by one by clicking the button again and again and it will be the most tedious work I'd have ever done. Is there any way to download them all at once using either a program or some other way?When we open up a problem on http:www.hackerran