原创 Java-Excel Sheet Column Number
Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding
2020-06-14 17:40:46
原创 Java-Majority Element
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2
2020-06-14 17:40:36
原创 Construct Binary Tree from Preorder and Inorder Traversal
Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do no
2020-02-23 20:21:18
原创 JAVA-Linked List Cycle I&&Linked List Cycle II
Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Follow up: Can you sol
2020-02-23 20:21:18
原创 Populating Next Right Pointers in Each Node
Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode
2020-02-23 20:21:18
原创 Balanced Binary Tree
Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined a
2020-02-23 20:21:18
原创 Binary Tree Level Order Traversal II
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level b
2020-02-23 20:21:18
原创 Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along
2020-02-23 20:21:18
原创 Path Sum II
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example:Giv
2020-02-23 20:21:18
原创 Populating Next Right Pointers in Each Node II
Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree?
2020-02-23 20:21:18
原创 Flatten Binary Tree to Linked List
Given a binary tree, flatten it to a linked list in-place. For example, Given 1 / \ 2 5
2020-02-23 20:21:18
原创 Binary Tree Zigzag Level Order Traversal
Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right
2020-02-23 20:21:18
原创 Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 將增序鏈表轉換爲
2020-02-23 20:21:18
原创 Word Ladder
Given two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to en
2020-02-23 20:21:18
原创 Triangle
Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row
2020-02-23 20:21:18