小云子93-CSDN博客

原创 LeetCodeOJ_3_m_Longest Substring Without Repeating Characters

答题链接题目:Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for “abcabcbb” is “abc”, which the length is 3

2015-12-12 11:29:08 277

原创 LeetCodeOJ_11_m_Container With Most Water

答题链接题目:Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find

2015-12-08 17:45:49 342

原创 LeetCodeOJ_5_m_Longest Palindromic Substring（最长回文子串）

答题链接题目:Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring.Tags String Similar

2015-12-07 22:14:48 328

原创 LeetCodeOJ_125_Valid Palindrome

答题链接题目:Given a string, determine if it is a palindrome（回文）, considering only alphanumeric characters and ignoring cases. For example, “A man, a plan, a canal: Panama” is a palindrome. “race a car” i

2015-11-18 21:46:40 285

原创 LeetCodeOJ_7_Reverse Integer

答题链接题目:Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321Have you thought about this? Here are some good questions to ask before coding. Bonus points for you

2015-11-18 21:37:46 291

原创 LeetCodeOJ_190_Reverse Bits

答题链接题目:Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary as 00111

2015-11-18 21:29:32 369

原创 LeetCodeOJ_242_Valid Anagram

答题链接题目:Given two strings s and t, write a function to determine if t is an anagram of s. For example, s = “anagram”, t = “nagaram”, return true. s = “rat”, t = “car”, return false. Note: You may a

2015-11-13 10:58:55 459

原创龟兔赛跑算法（Floyd判圈算法）

龟兔赛跑算法（Floyd判圈算法）——判断是否有环，确定环的起点和长度

2015-11-12 14:39:27 4450 1

原创 LeetCodeOJ_9_Palindrome Number

答题链接题目:Determine whether an integer is a palindrome. Do this without extra space. Tags Math Similar Problems (E)Palindrome Linked List分析:notes:不要忘记n为负的情况代码：class Solution {public: bool isPalind

2015-11-12 13:44:22 401

原创 LeetCodeOJ_234_Palindrome Linked List

答题链接题目:Given a singly linked list, determine if it is a palindrome(回文). Follow up: Could you do it in O(n) time and O(1) space?Tags: Linked List Two Pointers Similar: Problems (E)Palindrome Number,

2015-11-12 13:26:25 283

原创 LeetCodeOJ_223_Rectangle Area

答题链接题目:Find the total area covered by two rectilinear rectangles in a 2D plane. Each rectangle is defined by its bottom left corner and top right corner as shown in the figure. Assume that the tota

2015-11-10 16:19:49 302

原创 LeetCodeOJ_217_Contains Duplicate

答题链接题目:Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every elem

2015-11-10 16:14:13 346

原创 LeetCodeOJ_231_Power of Two

答题链接题目:Given an integer, write a function to determine if it is a power of two.Tags Math Bit Manipulation Similar Problems (E) Number of 1 Bits分析:无代码：class Solution {public: bool isPowerOfTwo(int

2015-11-10 16:01:48 256

原创 LeetCodeOJ_228_Summary Ranges

答题链接题目:Given a sorted integer array without duplicates, return the summary of its ranges. For example, given [0,1,2,4,5,7], return [“0->2”,”4->5”,”7”].Tags Array Similar Problems (M) Missing Ranges代码

2015-11-10 15:23:57 272

原创 linux下的git使用集锦

参考资料：1.廖雪峰的官方网站http://www.liaoxuefeng.com/wiki/0013739516305929606dd18361248578c67b8067c8c017b0002.http://blog.163.com/023_dns/blog/static/1187273662013111301046930/

2015-10-29 11:12:04 390

转载判断一个图是否有环(无向图、有向图)

原文地址：http://www.cnblogs.com/xwdreamer/archive/2011/06/11/2297008.html 1.

2015-10-26 16:05:03 1064

原创 LeetCodeOJ_208_Course Schedule

答题链接题目:There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed a

2015-10-26 15:53:31 226

转载机器学习之正则化（Regularization）

原地址：http://www.cnblogs.com/jianxinzhou/p/4083921.html?utm_source=tuicool&utm_medium=referral

2015-10-26 15:19:18 357

原创 LeetCodeOJ_206_Reverse Linked List

答题链接题目:Reverse a singly linked list. A linked list can be reversed either iteratively or recursively. Could you implement both?

2015-10-25 10:24:46 343

原创 STL之map

C++中map容器提供一个键值对容器，map与multimap差别仅仅在于multiple允许一个键对应多个值。 1. 头文件#include 2. 定义map3. 插入数据(1) my_Map[“a”] = 1; (2) my_Map.insert(map4. 查找数据map 5. 删除数据(1) my_Map.erase(my_Itr); (2) m

2015-10-24 14:13:18 266

原创 LeetCodeOJ_205_Submission Details

答题链接题目:Given two strings s and t, determine if they are isomorphic.Two strings are isomorphic if the characters in s can be replaced to get t.All occurrences of a character must be replaced with anothe

2015-10-24 13:50:58 275

原创 LeetCodeOJ_203_Remove Linked List Elements

答题链接题目:Remove all elements from a linked list of integers that have value val.Example Given: 1 –> 2 –> 6 –> 3 –> 4 –> 5 –> 6, val = 6 Return: 1 –> 2 –> 3 –> 4 –> 5代码：/** * Definition for singly-link

2015-10-04 00:21:41 228

原创 LeetCodeOJ_202_Happy Number

答题链接题目:Write an algorithm to determine if a number is “happy”.A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squar

2015-10-03 22:12:05 305

原创 LeetCodeOJ_160_Intersection of Two Linked Lists

答题链接题目:Write a program to find the node at which the intersection of two singly linked lists begins.For example, the following two linked lists: A: a1 → a2 ↘

2015-07-21 12:46:29 294

原创 LeetCodeOJ_168_Excel Sheet Column Title

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

2015-07-20 12:26:55 341

原创 LeetCodeOJ_171_Excel Sheet Column Number

Given a column title as appear in an Excel sheet, return its corresponding column number.

2015-07-17 16:00:46 346

原创 LeetCodeOJ_172_Factorial Trailing Zeroes

题目：Given an integer n, return the number of trailing zeroes in n!. Note: Your solution should be in logarithmic time complexity。

2015-07-16 00:34:53 254

原创 LeetCodeOJ_189_Rotate Array

Rotate an array of n elements to the right by k steps.For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. Note:Try to come up as many solutions as you can, there are at least 3 different ways to solve this proble

2015-06-17 16:22:56 382

原创 LeetCodeOJ_191_Number of 1 Bits_e

For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3.

2015-06-12 11:09:25 352

原创 LeetCodeOJ_198_House Robber_e

You are a professionalrobber planning to rob houses along a street. Each house has a certain amountof money stashed, the only constraint stopping you from robbing each of them isthat adjacent houses have security system connected and it will automaticallyc

2015-06-12 11:06:39 307

原创 LeetCodeOJ_199_Binary Tree Right Side View

Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom.

2015-06-12 10:55:01 439

原创 LeetCodeOJ_200_Number of Islands

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by water.

2015-06-08 23:46:43 336

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