1.3) Binary Tree Zigzag Level Order Traversal
Given the root of a binary tree, return the zigzag level order traversal of its nodes' values. Zigzag level order…
1.1) Binary Tree Level Order Traversal
Given the root of a binary tree, return the level order traversal of its nodes' values. Level order traversal means…
Binary Tree Inorder Traversal
Given the root of a binary tree, return the inorder traversal of its nodes' values. In inorder traversal, we visit…
Range Sum of BST
Given the root of a binary search tree (BST), and integers low and high, find the sum of all node…
Sum Root to Leaf Numbers
Given a binary tree, where each node has a value between 0 and 9, find the total sum of all…
Binary Tree Maximum Path Sum
Given a binary tree, find the maximum path sum. The maximum path sum is defined as the maximum sum of…
Path Sum III
Given a binary tree and a target sum, find the total number of all paths in the tree such that…
Path Sum II
Given a binary tree and a target sum, find all root-to-leaf paths where each path's sum equals the given target…
Path Sum
Given a binary tree and a target sum, determine if the tree has a root-to-leaf path such that adding up…
Middle of the Linked List
Given a singly-linked list, find the middle node of the list. If the list contains an even number of nodes,…