Really it was just write code to verify whether it can be done or not (return boolean) based on the N input (integer). Without having to write code it would re

Really it was just write code to verify whether it can be done or not (return boolean) based on the N input (integer). Without having to write code it would return true for N >= 4, but I didn't know that. I was just trying to get an initial solution down with recursion, not thinking about backtracking yet or worst case time (which was probably 2^N).