Answer from cs61c-ej (Leon Wang 16247444) for Question 5
It's not really difficult, it's just that it's seems like review of some of the concepts from CS 61B but it's in a different language.  I don't like to read through all the C code and understand what is going on since I really do know what is going on but reading C code and taking time to understand what all the variables and loops are for is very time consuming.  By just glancing over the C code, I may have missed some valuable information.