摘要：题目：有效的数独表 难度：Medium 题目内容： Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: A par
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摘要：题目：在翻转有序中搜索 难度：Medium 题目内容： Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., [0,1,2,4,5,6,7] migh
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摘要：题目：搜索目标范围 难度：Medium 题目内容： Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Yo
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摘要：题目：两整数相除 难度：Medium 题目内容： Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return
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摘要：题目：制造括号序列 难度：Medium 题目内容： Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. 翻译： 给定n对括号，写一个函数来生成所
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摘要：题目：合并两个已排序链表 难度：Easy 题目内容： Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of th
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摘要：题目：有效的括号序列 难度：Easy 题目内容： Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An inp
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摘要：题目：删除链表的倒数第N个节点 难度：Medium 题目内容： Given a linked list, remove the n-th node from the end of list and return its head. 翻译：给定一个链表，删除倒数第n个节点并返回其头部。 Example
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摘要：题目：最长公共前缀 难度：EASY 题目内容： Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent.
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摘要：题目：最长公共前缀 难度：EASY 题目内容： Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an
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摘要：题目：罗马数字转换 题目难度：easy 题目内容：Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman
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摘要：题目：Reverse Integer 难度：Easy 题目内容： Given a 32-bit signed integer, reverse digits of an integer. Note:Assume we are dealing with an environment which cou
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摘要：题目内容： 给定一个长度为N(N>1)的整型数组A，可以将A划分成左右两个部分，左部分A[0..K]，右部分A[K+1..N-1]，K可以取值的范围是[0,N-2]。求这么多划分方案中，左部分中的最大值减去右部分最大值的绝对值，最大是多少？ 给定整数数组A和数组的大小n，请返回题目所求的答案。 测试
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摘要：题目中文：求最长回文子串 题目难度：Medium 题目内容： Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. 翻译：
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摘要：题目中文：没有重复字符的最长子串 题目难度：Medium 题目内容： Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb",
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摘要：题目难度：Medium 题目： You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of th
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摘要：题目难度：Easy 题目： Given a sorted array, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate
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摘要：题目难度：Medium 题目： Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets i
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摘要：题目难度：Medium 题目： Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the
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摘要：题目难度：Medium 题目： Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which g
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