Update README.md

Author: neetcode-gh

README.md

@@ -2,4 +2,12 @@
 
 ### Contributing
 
-I mostly do solutions in Python, but if you would like to contribute solutions for other common languages like Java, C++ and JavaScript, please feel free to make a pull request! :)
+Solutions needed:
+* Java
+* Javascript
+
+Complete:
+* Python
+* C++
+
+Please feel free to open a pull request to add solutions in other languages for the Neetcode 150 problem list. If you would like to have collaborator permissions on the repo to merge your own PRs or review others' PRs please let me know.