changes made (#10045)

* changes in competitive programming file

* Update problem-sets-competitive-programming.md

* Changes made

Removed the geeks for geeks which was not needed and added an extra resource in place of that

more/problem-sets-competitive-programming.md

@@ -16,7 +16,6 @@
 * [APL Problem Solving Competition](https://contest.dyalog.com)
 * [AtCoder](https://atcoder.jp)
 * [beecrowd](https://www.beecrowd.com.br)
-* [Binary Search](https://binarysearch.com)
 * [COCI](https://hsin.hr/coci/)
 * [Codeabbey](http://www.codeabbey.com)
 * [Codechef](https://www.codechef.com/contests)
@@ -133,6 +132,7 @@
 * [Python Practice Projects](http://pythonpracticeprojects.com)
 * [Rosalind](http://rosalind.info/problems/locations/)
 * [Sphere Online Judge](http://www.spoj.com/problems/classical)
+* [Striver's A2Z DSA Course/sheet](https://takeuforward.org/strivers-a2z-dsa-course/strivers-a2z-dsa-course-sheet-2)
 * [TalentBuddy](http://www.talentbuddy.co/blog/)
 * [The Ultimate Topic List(with Tutorials, Problems, and Templates)](https://blog.shahjalalshohag.com/topic-list/) - Shahjalal Shohag
 * [Timus Online Judge](http://acm.timus.ru)