Explain need of an algorithm

Question

https://www.sololearn.com/discuss/2849362/?ref=app

Answer 1

SEFIU ADEWALE It's strange that you'd posted your question in some other, I mean totally unrelated, thread and you've posted a separate Q&A thread mentioning that single comment. Weird.

Answer 2

This is a really hard question. But i am sure someone will help you