🪐 Fix broken link

Author: von-steinkirch

README.md

@@ -8,9 +8,8 @@ It's loosely based on the exercises & theory from the book [Cracking the Code In
 
 - [Here is the PDF for the book](https://github.com/bt3gl/Book_on_Python_Algorithms_and_Data_Structure/blob/master/first_edition/ebook_pdf/book_second_edition.pdf).
 
-- [Here is the source code, including abstract structures, bitwise operations, builtin Python data structures, searching and sorting, trees, and real interview problems](https://github.com/bt3gl/Book-on-Python-Algorithms-and-Data-Structures/tree/master/First_edition_2014/ebook_src).
+- [Here is the source code, including abstract structures, bitwise operations, builtin Python data structures, searching and sorting, trees, and real interview problems](https://github.com/bt3gl/Book_on_Python_Algorithms_and_Data_Structure/tree/master/first_edition/ebook_src.
 
-- [Here are several samplings for coding challenges](https://github.com/bt3gl/Book-on-Python-Algorithms-and-Data-Structures/tree/master/First_edition_2014/other_resources), including [Project Euler](https://projecteuler.net/), [Top Coder](https://www.topcoder.com/challenges), [Interview Cake](https://www.interviewcake.com/), and [the eudyptula challenge](http://eudyptula-challenge.org/).
 
 Even after the years, this book can be useful if you are aiming to learn Python and/or practice for software engineering interviews.