Update links to Topcoder community articles

README.md

@@ -550,8 +550,8 @@ Gets messy quick. **I use a pencil and eraser.**
 Don't forget your key coding interview books [here](#interview-prep-books).
 
 Solving Problems:
-- [How to Find a Solution](https://www.topcoder.com/community/competitive-programming/tutorials/how-to-find-a-solution/)
-- [How to Dissect a Topcoder Problem Statement](https://www.topcoder.com/community/competitive-programming/tutorials/how-to-dissect-a-topcoder-problem-statement/)
+- [How to Find a Solution](https://www.topcoder.com/thrive/articles/How%20To%20Find%20a%20Solution)
+- [How to Dissect a Topcoder Problem Statement](https://www.topcoder.com/thrive/articles/How%20To%20Dissect%20a%20Topcoder%20Problem%20Statement%20Content)
 
 Coding Interview Question Videos:
 - [IDeserve (88 videos)](https://www.youtube.com/playlist?list=PLamzFoFxwoNjPfxzaWqs7cZGsPYy0x_gI)
@@ -596,8 +596,8 @@ But don't forget to do coding problems from above while you learn!
 - [ ] [UC Berkeley Big O (video)](https://archive.org/details/ucberkeley_webcast_VIS4YDpuP98)
 - [ ] [Amortized Analysis (video)](https://www.youtube.com/watch?v=B3SpQZaAZP4&index=10&list=PL1BaGV1cIH4UhkL8a9bJGG356covJ76qN)
 - [ ] TopCoder (includes recurrence relations and master theorem):
-    - [Computational Complexity: Section 1](https://www.topcoder.com/community/competitive-programming/tutorials/computational-complexity-section-1/)
-    - [Computational Complexity: Section 2](https://www.topcoder.com/community/competitive-programming/tutorials/computational-complexity-section-2/)
+    - [Computational Complexity: Section 1](https://www.topcoder.com/thrive/articles/Computational%20Complexity%20part%20one)
+    - [Computational Complexity: Section 2](https://www.topcoder.com/thrive/articles/Computational%20Complexity%20part%20two)
 - [ ] [Cheat sheet](http://bigocheatsheet.com/)
 
 Well, that's about enough of that. 
@@ -726,7 +726,7 @@ if you can identify the runtime complexity of different algorithms. It's a super
 - ### Binary search
     - [ ] [Binary Search (video)](https://www.youtube.com/watch?v=D5SrAga1pno)
     - [ ] [Binary Search (video)](https://www.khanacademy.org/computing/computer-science/algorithms/binary-search/a/binary-search)
-    - [ ] [detail](https://www.topcoder.com/community/competitive-programming/tutorials/binary-search/)
+    - [ ] [detail](https://www.topcoder.com/thrive/articles/Binary%20Search)
     - [ ] [blueprint](https://leetcode.com/discuss/general-discussion/786126/python-powerful-ultimate-binary-search-template-solved-many-problems)
     - [ ] Implement:
         - binary search (on sorted array of integers)
@@ -1165,7 +1165,7 @@ Graphs can be used to represent many problems in computer science, so this secti
         - [ ] [Performance Of Tries (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/PvlZW/core-performance-of-tries)
         - [ ] [Implementing A Trie (video)](https://www.coursera.org/learn/data-structures-optimizing-performance/lecture/DFvd3/core-implementing-a-trie)
     - [ ] [The Trie: A Neglected Data Structure](https://www.toptal.com/java/the-trie-a-neglected-data-structure)
-    - [ ] [TopCoder - Using Tries](https://www.topcoder.com/community/competitive-programming/tutorials/using-tries/)
+    - [ ] [TopCoder - Using Tries](https://www.topcoder.com/thrive/articles/Using%20Tries)
     - [ ] [Stanford Lecture (real world use case) (video)](https://www.youtube.com/watch?v=TJ8SkcUSdbU)
     - [ ] [MIT, Advanced Data Structures, Strings (can get pretty obscure about halfway through) (video)](https://www.youtube.com/watch?v=NinWEPPrkDQ&index=16&list=PLUl4u3cNGP61hsJNdULdudlRL493b-XZf)
 
@@ -1425,7 +1425,7 @@ You're never really done.
     - [ ] [Introduction to Architecting Systems for Scale](http://lethain.com/introduction-to-architecting-systems-for-scale/)
     - [ ] [Scaling mobile games to a global audience using App Engine and Cloud Datastore (video)](https://www.youtube.com/watch?v=9nWyWwY2Onc)
     - [ ] [How Google Does Planet-Scale Engineering for Planet-Scale Infra (video)](https://www.youtube.com/watch?v=H4vMcD7zKM0)
-    - [ ] [The Importance of Algorithms](https://www.topcoder.com/community/competitive-programming/tutorials/the-importance-of-algorithms/)
+    - [ ] [The Importance of Algorithms](https://www.topcoder.com/thrive/articles/The%20Importance%20of%20Algorithms)
     - [ ] [Sharding](http://highscalability.com/blog/2009/8/6/an-unorthodox-approach-to-database-design-the-coming-of-the.html)
     - [ ] [Engineering for the Long Game - Astrid Atkinson Keynote(video)](https://www.youtube.com/watch?v=p0jGmgIrf_M&list=PLRXxvay_m8gqVlExPC5DG3TGWJTaBgqSA&index=4)
     - [ ] [7 Years Of YouTube Scalability Lessons In 30 Minutes](http://highscalability.com/blog/2012/3/26/7-years-of-youtube-scalability-lessons-in-30-minutes.html)