Level 2

Stop learning useless algorithms, go and solve some problems, learn how to use binary search. - Um_nik

Target for this level is also to learn about simple algorithms.

Binary search is one of the key algorithms to progress further. Later on, you will discover that the idea of Binary search is extremely common in competitive programming.

Also, at this level, if you come across a math problem, there's a good chance that it involves prime numbers.