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摘要： 题目内容： Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra sp 阅读全文

摘要： 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 the first two lists. 题目分 阅读全文

摘要： 题目内容： Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close i 阅读全文

摘要： 题目内容：Write a function to find the longest common prefix string amongst an array of strings 题目分析：本题目利用字符串数组中的一个字符串作为参考，数组中的所有字符串都和该字符串进行对比，找出所有字符串开头出现字 阅读全文

摘要： 题目内容： Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 题目分析：罗马数字向阿拉伯数字的转换情况如下： 1、M=1000 D=5 阅读全文

摘要： 题目内容： Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 题目分析：反转的方法很简单，重点在于判断溢出的问题，下面给出了两种方法。 方法一： 判断溢出方法：在执行完 阅读全文

摘要： 题目内容：Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would ha 阅读全文