Simplify

摘要： 3sum Closest: Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return... 阅读全文

摘要： Swap Nodes in Pairs: Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you ... 阅读全文

摘要： Remove Element： Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate... 阅读全文

摘要： Remove Duplicates from Sorted Array: Given a sorted array, remove the duplicates in place such that each element appear only once and... 阅读全文

摘要： Generate Parentheses: Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For ... 阅读全文

摘要： 1.InputStream、OutputStream处理字节流的抽象类InputStream 是字节输入流的所有类的超类,一般我们使用它的子类,如FileInputStream等.OutputStream是字节输出流的所有类的超类,一般我们使用它的子类,如FileOu... 阅读全文

摘要： 今天安装配置Android Studio的时候，用SDK Manager下载SDK的时候只显示了一个7.0，别的都刷新不出来（被墙了）。去网上搜索怎么解决，发现很多帖子的方法已经过时了（跟现在的AS版本不一样）。最后找到一种方法，供大家参考。打开hosts，在最后一... 阅读全文

摘要： Longest Substring Without Repeating Characters: Given a string, find the length of the longest substring without repeating characters... 阅读全文

摘要： Binary Tree Postorder Given a binary tree, return the postorder traversal of its nodes’ values. For example: Given binary tree {... 阅读全文

摘要： Add Two Numbers: You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse or... 阅读全文