write the post order of the above BST

I,m confusing it starts with 50 or 60

CodePudding user response：

"Post order" means that a parent is always visited after ("post") its children are visited.. So if you would start with 50, you cannot visit 60 anymore, as that would violate that rule.

The post order thus starts like this: 60, 50, 80, ...

As this is an assignment, please figure out the rest yourself, just making sure you always abide to the above rule.