Tree Concept - JangoBoogaloo/LeetCodeExcercise GitHub Wiki
Predecessor & Successor
the previous/after node visited in certain order
Inorder predecessor
previous node in the inorder traversal of it
Inorder Successor
after node in the inorder traversal of it
Traversal
Inorder
left-root-right
Preorder
root-left-right
Postorder
left-right-root