Update ds-algo.md

Author: shekhardtu

ds-algo.md

@@ -1,5 +1,5 @@
 
 ##### 1. Algorithmic thinking
-> - [Data Structure](https://www.interviewcake.com/article/data-structures-coding-interview?course=fc1&section=algorithmic-thinking)
-> - [Big O Notation](https://www.interviewcake.com/article/big-o-notation-time-and-space-complexity?course=fc1&section=algorithmic-thinking)
-> - [Logrithms](https://www.interviewcake.com/article/logarithms?course=fc1&section=algorithmic-thinking) 
+> - [Big O Notation](https://www.interviewcake.com/article/javascript/big-o-notation-time-and-space-complexity)
+> - [Data Structure](https://www.interviewcake.com/article/javascript/data-structures-coding-interview)
+> - [Logrithms](https://www.interviewcake.com/article/javascript/logarithms)