摘要： Maximum Gap问题：Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/s... 阅读全文

摘要： Count Primes问题：Count the number of prime numbers less than a non-negative number,n思路： 计算质数的方法：http://en.wikipedia.org/wiki/Prime_number我的代码：public cl... 阅读全文

摘要： Surrounded Regions问题：Given a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is captured by flipping all'O's into'X's in t... 阅读全文

摘要： Isomorphic Strings问题：Given two stringssandt, determine if they are isomorphic.Two strings are isomorphic if the characters inscan be replaced to gett.... 阅读全文

摘要： Reverse Linked List问题：Reverse a singly linked list.思路： 插入排序的应用我的代码：public class Solution { public ListNode reverseList(ListNode head) { if(... 阅读全文

摘要： String to Integer问题：Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please d... 阅读全文

摘要： Bitwise AND of Numbers Range问题：Given a range [m, n] where 0 n || m>= 1; n >>= 1; moveFactor <<= 1; } return m * mo... 阅读全文

摘要： Best Time to Buy and Sell Stock III问题：Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find ... 阅读全文

摘要： First Missing Positive问题：Given an unsorted integer array, find the first missing positive integer.思路： A[A[i]] == A[i] 的经典应用我的代码：public class Solution... 阅读全文

摘要： Permutation Sequence问题：The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,思路：假设有n个元素... 阅读全文