[stale2002]

But the point is that if you cant do something so simple, like traverse a tree, then you probably don't understand how trees work to begin with.

Similarly, I've never had to implement fizz buzz for real, actual, work. But I wouldn't trust a programmer who was incapable of doing fizz buzz without importing a fizz buzz library.

[sobani]

But the earlier comment wasn't talking about _traversing_ a tree, it was talking about _balancing_ it, which is a much harder problem and one I wouldn't want to do without google either.