IncredibleThings

摘要： Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. Example 1: Example 2: 复杂度 时间 O(NM) 空间 O(1) 思路 阅读全文

摘要： Given a stack of integers, sort it in ascending order using another temporary stack. Examples: 阅读全文

摘要： Find the sum of all left leaves in a given binary tree. Example: 阅读全文

摘要： You are given two non-empty linked lists representing two non-negative integers. The most significant digit comes first and each of their nodes contai 阅读全文

摘要： Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its ne 阅读全文

摘要： Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. OJ's undirected graph serialization: Nodes are labeled 阅读全文

摘要： Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: The l 阅读全文

摘要： Given an input string, reverse the string word by word. Example: Input: "the sky is blue", Output: "blue is sky the". Notes: A word is defined as a se 阅读全文

摘要： Given a column title as appear in an Excel sheet, return its corresponding column number. For example: Example 1: Example 2: Example 3: 阅读全文

摘要： Union Two Sorted List with Distinct Value Given X = { 10, 12, 16, 20 } & Y = {12, 18, 20, 22} We would like to find out the union of two sorted arrays 阅读全文