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原创 LeetCode解题笔记350 Intersection of Two Arrays II

题目：Given two arrays, write a function to compute their intersection.Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2].Note:Each element in the result should app

2018-02-04 15:23:29 189

原创 LeetCode解题笔记349 Intersection of Two Arrays

题目：Given two arrays, write a function to compute their intersection.Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].Note:Each element in the result must be uniqu

2018-02-04 15:19:42 176

原创 LeetCode解题笔记290 Word Pattern

题目：Given a pattern and a string str, find if str follows the same pattern.Here follow means a full match, such that there is a bijection between a letter in pattern and a non-empty word

2018-02-04 00:47:08 156

原创 LeetCode解题笔记242 Valid Anagram

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:Yo

2018-02-04 00:32:52 183

原创 LeetCode解题笔记205 Isomorphic Strings

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

2018-02-04 00:31:12 214

原创 LeetCode解题笔记204 Count Primes

题目：Description:Count the number of prime numbers less than a non-negative number, n.python解法一：思路：当前的数字的倍数都不是素数。class Solution: def countPrimes(self, n): """ :type n

2018-02-03 23:56:30 160

原创 LeetCode解题笔记36 Valid Sudoku

题目：Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with the character '.'.A partia

2018-02-01 23:04:02 171

原创 LeetCode解题笔记37 Sudoku Solver

题目：Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character '.'.You may assume that there will be only one unique solution.

2018-02-01 23:01:19 180

原创 LeetCode解题笔记2 Add Two Numbers

题目：You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers a

2018-02-01 18:32:07 179

原创 LeetCode解题笔记1 Two Sum

题目：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 have exactly one solution, and you may not us

2018-02-01 18:21:20 169

原创 ubantu虚拟机重启后进入initrafms

ubantu虚拟机重启后无法进入图形化界面，而是进入initrafms模式，可能是文件系统损坏，尝试进行修复。initrafms模式如下图所示：使用fsck/dev/sda1命令进行修复：一路y下来，最终修复成功，然后重启。

2018-01-24 15:40:16 932

原创 LeetCode解题笔记136 Single Number

题目：Given an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it without

2018-01-23 16:12:49 198

原创 LeetCode解题笔记212 Word Search II

题目：Given a 2D board and a list of words from the dictionary, find all words in the board.Each word must be constructed from letters of sequentially adjacent cell, where "adjacent" cells are

2018-01-23 14:42:48 231

原创 LeetCode解题笔记79 Word Search

题目：Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or v

2018-01-23 11:24:39 176

原创 LeetCode解题笔记62 Unique Paths

原题目：A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).The robot can only move either down or right at any point in time. The robot is trying to reach the

2018-01-18 15:33:50 169

原创 LeetCode解题笔记45 Jump Game II

原题目：Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximum jump length at that position.You

2018-01-17 17:28:39 239

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