Relatively easy online coding test and enough time to finish, so there's no need to rush. However, the descriptions can be unclear. I made the wrong assumption about the input parameter data and wrote my algo based on that. MY algo did exactly what I wanted to do and was quite efficient too. But, turned out because I made a slightly off assumption, I was actually solving the problem in a wrong way. I take this as part my oversight and the fault of how the question was worded. Seriously, you could have just explained exactly how the input parameters are structured.