How to Sum within A Range in a Binary Search Tree?
Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive). The binary search tree is …
Tag: recursion and iterative
How to Remove all elements of val From a Linked List?
You are asked to remove all elements of value val from a integer linked list. For example, Remove 2 from the following list, 1 -> 2 -> 2 -> …