摘要： Anagrams问题：Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.思路： Anagrams：排序后的String作为... 阅读全文

摘要： Letter Combinations of a Phone Number问题：iven a digit string, return all possible letter combinations that the number could represent.A mapping of digi... 阅读全文

摘要： Binary Tree Level Order Traversal问题： Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, lev... 阅读全文

摘要： Copy List with Random Pointer问题：A linked list is given such that each node contains an additional random pointer which could point to any node in the ... 阅读全文

摘要： Remove Duplicates from Sorted List II问题：Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the... 阅读全文

摘要： Min Stack问题：Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack.pop(... 阅读全文

摘要： Compare Version Numbers问题：Compare two version numbersversion1andversion2.Ifversion1>version2return 1, ifversion1 two) return 1; if(one v2.... 阅读全文

摘要： Excel Sheet Column Title问题：Given a positive integer, return its corresponding column title as appear in an Excel sheet.思路： 进制访问问题我的代码：public class So... 阅读全文

摘要： Binary Tree Zigzag Level Order Traversal问题：Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, t... 阅读全文

摘要： Minimum Depth of Binary Tree问题：Given a binary tree, find its minimum depth.The minimum depth is the number of nodes along the shortest path from the r... 阅读全文