摘要：1)深入Java集合学习系列：HashMap的实现原理2)深入Java集合学习系列：LinkedHashMap的实现原理3)深入Java集合学习系列：HashSet的实现原理4)深入Java集合学习系列：LinkedHashSet的实现原理5)深入Java集合学习系列：ArrayList的实现原理 阅读全文

摘要：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. 1 publi... 阅读全文

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

摘要：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 three integers.... 阅读全文

摘要：Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoints of ... 阅读全文

摘要：Implementatoito convert a string to an integer.转换很简单，唯一的难点在于需要开率各种输入情况，例如空字符串，含有空格，字母等等。另外需在写的时候注意细节问题，完成后需要反复调试，整合。 1 public class Solution { 2 p... 阅读全文

摘要：The string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font fo... 阅读全文

摘要：Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest pa... 阅读全文

摘要：There are two sorted arraysnums1andnums2of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should... 阅读全文

摘要：Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters fo... 阅读全文

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摘要：1 /** 2 * 3 */ 4 package com.wsheng.aggregator.algorithm.string; 5 6 import java.util.Stack; 7 8 /** 9 * 8 种字符串反转的方法, 其实可以是9种方法，第9种是... 阅读全文

摘要：You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single ... 阅读全文

摘要：Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two nu... 阅读全文

摘要：Rotate an array ofnelements to the right byksteps.For example, withn= 7 andk= 3, the array[1,2,3,4,5,6,7]is rotated to[5,6,7,1,2,3,4].Note:Try to come... 阅读全文