DSA - Binary Search Tree - Postorder
What is the postorder algorithm? The postorder algorithm, similar to the preorder algorithm, returns a list of values in the order they are visited. Code Example final class BSTNode<Value: Comparable> { var val: Value? var left: BSTNode? var right: BSTNode? init(val: Value? = nil) { self.val = val } func postorder(_ visited: inout [Value]) -> [Value] { if self.left != nil { self.left!.postorder(&visited) } if self.right != nil { self.right!.postorder(&visited) } if self....