[srdev]

I'm with you on this one. I understand frustration at "trick" problems or problems that make use of little-known algorithms or approaches. But there seems to be this sentiment that doing basic traversal and manipulation on data structures like a tree is burdensome. I simply can't trust in your abilities as a software developer if you need Stack Overflow to traverse a tree. You do need some fluency with basic data structure and algorithms, along with the ability to adapt them, in order to do non-trivial software development.