Data Structure and Algorithms | 2020-04-16 Leetcode 129. Sum Root to Leaf Numbers Question Given a binary tree, the path from the root node to the leaf node for ...
Data Structure and Algorithms | 2020-04-07 Leetcode 114. Flatten Binary Tree to Linked List Question Expand a binary tree into a linked list. Similar Question Medium - 430. Flatten a Multil ...
Data Structure and Algorithms | 2020-04-02 Leetcode 113. Path Sum II Question Given a sum, output tha paths which starts from the root node to the leaf nodes, and add ...
Data Structure and Algorithms | 2020-03-25 Leetcode 105. Construct Binary Tree from Preorder and Inorder Traversal Question Restored binary tree according to the pre-order and in-order traversal. Similar Question ...
Data Structure and Algorithms | 2020-02-11 Leetcode 98. Validate Binary Search Tree Question Given a tree, determine if the tree is a valid binary search tree. The binary search tree ...
Data Structure and Algorithms | 2020-02-09 Leetcode 94. Binary Tree Inorder Traversal Question In-order traversal of a binary tree. Similar Questions Medium - 98. Validate Binary Sear ...
Data Structure and Algorithms | 2020-01-28 Leetcode 96. Unique Binary Search Trees Question Similar to 95. Unique Binary Search Trees II. This time just need to count the number of ...
Data Structure and Algorithms | 2020-01-22 Leetcode 95. Unique Binary Search Trees II Question Given n, use these numbers 1 ... n to generate all possible binary search trees. Similar ...