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  • 【转载】非常棒的算法面试类资源汇总

    今天看到了这篇文章,非常非常棒:http://blog.csdn.net/nedushy123/article/details/23827361

    把内容转载如下,以作收藏:

    经典算法面试题一览

    1. 自然就是careercup (类似的网站还有glassdoor

    careercup不难,参考二爷划的重点,早早开始做,即使先开始做前几章简单的。一亩三分地经常有刷题活动

    Cracking the Coding Interview v5  8.9/88

    image    

    2. leetcode的题稍难一些,不过很有趣,可以参考这份难度系数表刷题(文末有附),还有一个tips,这哥们儿刷题代码都放在github上了,可以参考下

       google code jam google面可以做做

       interviewstreet

       codility 手把手教你做面试题

    3. 推荐 Coding interview exposed (3ed) 这个最简单了,基础比较挫的可以从这里开始

    这本书籍不是“课本”,不是“课程”,而是教你做各种常见面试题目的。熟练掌握这本书籍的内容,是你找到工作的基础。

    Programming Interviews Exposed 8.0/60 | 程序员面试攻略 7.7/86

    image   s2833948

    4. 中文资料系统学习

    编程之美 8.3/2289

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    剑指Offer:名企面试官精讲典型编程题 何海涛的博客

    剑指offer 8.3/159

    image

    结构之法 算法之道 July的博客

    中文在线编程系统:

    九度Online Judge (基于《剑指Offer》)

    ITint5也不错

    英雄会,在线编程挑战平台,时而会有奖品

    5.攻略

    一亩三分地 留美招工Tips Warald 

    mitbbs的JobHunting版(需翻墙)

    大牛制定的MIT算法导论公开课学习计划,配套精选的ACM题

    网易云课堂出了求职自救战

    6.资讯

    水木Intern版

    7.语言

    Python面试题集合

    8.其他书籍

    编程珠玑 9.2/1215

    image

    The Google Resume 8.2/38 | 金领简历 8.2/20

    image   image

    This Is What A GOOD Resume Should Look Like

    大话数据结构 8.1/336

    image

    大话设计模式 8.3/1139

    image

    鸟哥的Linux私房菜.基础学习篇  9.1/1097

    image

    UNIX环境高级编程 9.4/1531

    image

    UNIX编程艺术 9.1/1651

    image

    人人都有好工作 7.9/45

    image

    谁是谷歌想要的人才 7.4/195

    image

    浪潮之巅 9.1/10221

    image

    黑客与画家 8.8/7032

    image

    暗时间 8.5/4871

    image

    程序员面试宝典 6.1/118(很多错误)

    image

    参考:

    http://www.1point3acres.com/bbs/thread-50411-1-1.html

    http://www.zzsec.org/tags.html#leetcode-ref

    附:

    leetcode Questions

    Id Question Difficulty Freqency Data Structures Algorithms
    1 Two Sum 2 5 array, set sort, two pointers
    8 String to Integer (atoi) 2 5 string math
    20 Valid Parentheses 2 5 string stack
    21 Merge Two Sorted Lists 2 5 linked list sort, two pointers, merge
    65 Valid Number 2 5 string math
    70 Climbing Stairs 2 5   dp
    88 Merge Sorted Array 2 5 array two pointers, merge
    125 Valid Palindrome 2 5 string two pointers
    15 3Sum 3 5 array two pointers
    50 Pow(x, n) 3 5   binary search, math
    73 Set Matrix Zeroes 3 5 array  
    98 Validate Binary Search Tree 3 5 tree dfs
    127 Word Ladder 3 5 graph bfs, shortest path
    28 Implement strStr() 4 5 string two pointers, KMP, rolling hash
    56 Merge Intervals 4 5 array, linked list, red-black tree sort, merge
    57 Insert Interval 4 5 array, linked list, red-black tree sort, merge
    27 Remove Element 1 4 array two pointers
    13 Roman to Integer 2 4   math
    24 Swap Nodes in Pairs 2 4 linked list  
    67 Add Binary 2 4 string two pointers, math
    129 Sum Root to Leaf Numbers 2 4 tree dfs
    2 Add Two Numbers 3 4 linked list two pointers, math
    12 Integer to Roman 3 4   math
    22 Generate Parentheses 3 4 string dfs
    23 Merge k Sorted Lists 3 4 linked list, heap sort, two pointers, merge
    46 Permutations 3 4 array permutation
    49 Anagrams 3 4 string, hashtable  
    77 Combinations 3 4   combination
    78 Subsets 3 4 array recursion, combination
    79 Word Search 3 4 array dfs
    91 Decode Ways 3 4 string recursion, dp
    102 Binary Tree Level Order Traversal 3 4 tree bfs
    131 Palindrome Partitioning 3 4 string dfs
    69 Sqrt(x) 4 4   binary search
    26 Remove Duplicates from Sorted Array 1 3 array two pointers
    83 Remove Duplicates from Sorted List 1 3 linked list  
    112 Path Sum 1 3 tree dfs
    7 Reverse Integer 2 3   math
    19 Remove Nth Node From End of List 2 3 linked list two pointers
    62 Unique Paths 2 3 array dp
    108 Convert Sorted Array to Binary Search Tree 2 3 tree dfs
    17 Letter Combinations of a Phone Number 3 3 string dfs
    39 Combination Sum 3 3 array combination
    53 Maximum Subarray 3 3 array dp
    63 Unique Paths II 3 3 array dp
    64 Minimum Path Sum 3 3 array dp
    74 Search a 2D Matrix 3 3 array binary search
    82 Remove Duplicates from Sorted List II 3 3 linked list recursion, two pointers
    86 Partition List 3 3 linked list two pointers
    93 Restore IP Addresses 3 3 string dfs
    105 Construct Binary Tree from Preorder and Inorder Tr 3 3 array, tree dfs
    106 Construct Binary Tree from Inorder and Postorder T 3 3 array, tree dfs
    114 Flatten Binary Tree to Linked List 3 3 tree recursion, stack
    116 Populating Next Right Pointers in Each Node 3 3 tree dfs
    29 Divide Two Integers 4 3   binary search, math
    33 Search in Rotated Sorted Array 4 3 array binary search
    34 Search for a Range 4 3 array binary search
    43 Multiply Strings 4 3 string two pointers
    51 N-Queens 4 3 array dfs
    52 N-Queens II 4 3 array dfs
    72 Edit Distance 4 3 string dp
    94 Binary Tree Inorder Traversal 4 3 tree, hashtable recursion, morris, stack
    103 Binary Tree Zigzag Level Order Traversal 4 3 queue, tree bfs, stack
    109 Convert Sorted List to Binary Search Tree 4 3 linked list recursion, two pointers
    128 Longest Consecutive Sequence 4 3 array  
    130 Surrounded Regions 4 3 array bfs, dfs
    132 Palindrome Partitioning II 4 3 string dp
    4 Median of Two Sorted Arrays 5 3 array binary search
    10 Regular Expression Matching 5 3 string recursion, dp
    44 Wildcard Matching 5 3 string recursion, dp, greedy
    81 Search in Rotated Sorted Array II 5 3 array binary search
    66 Plus One 1 2 array math
    101 Symmetric Tree 1 2 tree dfs
    110 Balanced Binary Tree 1 2 tree dfs
    9 Palindrome Number 2 2   math
    35 Search Insert Position 2 2 array  
    36 Valid Sudoku 2 2 array  
    38 Count and Say 2 2 string two pointers
    80 Remove Duplicates from Sorted Array II 2 2 array two pointers
    113 Path Sum II 2 2 tree dfs
    3 Longest Substring Without Repeating Characters 3 2 string, hashtable two pointers
    11 Container With Most Water 3 2 array two pointers
    18 4Sum 3 2 array  
    55 Jump Game 3 2 array  
    59 Spiral Matrix II 3 2 array  
    61 Rotate List 3 2 linked list two pointers
    92 Reverse Linked List II 3 2 linked list two pointers
    5 Longest Palindromic Substring 4 2 string  
    25 Reverse Nodes in k-Group 4 2 linked list recursion, two pointers
    37 Sudoku Solver 4 2 array dfs
    40 Combination Sum II 4 2 array combination
    42 Trapping Rain Water 4 2 array two pointers, stack
    45 Jump Game II 4 2 array  
    47 Permutations II 4 2 array permutation
    48 Rotate Image 4 2 array  
    54 Spiral Matrix 4 2 array  
    68 Text Justification 4 2 string  
    75 Sort Colors 4 2 array sort, two pointers
    76 Minimum Window Substring 4 2 string two pointers
    89 Gray Code 4 2   combination
    90 Subsets II 4 2 array recursion, combination
    99 Recover Binary Search Tree 4 2 tree dfs
    115 Distinct Subsequences 4 2 string dp
    117 Populating Next Right Pointers in Each Node II 4 2 tree dfs
    124 Binary Tree Maximum Path Sum 4 2 tree dfs
    31 Next Permutation 5 2 array permutation
    41 First Missing Positive 5 2 array sort
    84 Largest Rectangle in Histogram 5 2 array stack
    87 Scramble String 5 2 string recursion, dp
    97 Interleaving String 5 2 string recursion, dp
    58 Length of Last Word 1 1 string  
    100 Same Tree 1 1 tree dfs
    104 Maximum Depth of Binary Tree 1 1 tree dfs
    111 Minimum Depth of Binary Tree 1 1 tree dfs
    126 Word Ladder II 1 1    
    14 Longest Common Prefix 2 1 string  
    118 Pascal's Triangle 2 1 array  
    119 Pascal's Triangle II 2 1 array  
    121 Best Time to Buy and Sell Stock 2 1 array dp
    6 ZigZag Conversion 3 1 string  
    16 3Sum Closest 3 1 array two pointers
    30 Substring with Concatenation of All Words 3 1 string two pointers
    71 Simplify Path 3 1 string stack
    96 Unique Binary Search Trees 3 1 tree dp
    107 Binary Tree Level Order Traversal II 3 1 tree bfs
    120 Triangle 3 1 array dp
    122 Best Time to Buy and Sell Stock II 3 1 array greedy
    32 Longest Valid Parentheses 4 1 string dp
    95 Unique Binary Search Trees II 4 1 tree dp, dfs
    123 Best Time to Buy and Sell Stock III 4 1 array dp
    60 Permutation Sequence 5 1   permutation, math
    85 Maximal Rectangle 5 1 array dp, stack

    很可惜二爷不再更新了,未名上Jc2013补充了一点新题

    1. Clone Graph-> BFS+HashMap
    2. Gas Station->DP
    3. Candy->Two Pointers
    4. Single Number-> Xor, HashMap, or Sum or Product way to find
    5. Single Number II -> Xor, HashMap
    6. Copy List with Random Pointers -> Two Pointers, HashMap with two times 
    traverse(like clone graph)
    7. List Cycle, List Cycle II, Reorder List-> Two Pointers
    8. Binary Tree Preorder, Postorder recursive -> Using stack to mock 
    recursive way, or implement like morris way.
    9. LRU Cache-> HashMap + list 
    10. Insertion sort list -> Two Pointers
    11. Sort List-> I implement merge sort, still, two pointers method, 
    combination of merge sort list and split
    list
    12. Word Break -> DFS DP
    13. Word Break II -> DP + Backtracking

    二爷的Careercup 150总结

    很多人都说把这150题做了一遍或几遍,但是我感觉算法题才是重点,其他的很多题面 
    试基本碰不上,没看出来有必要全做。这里总结一下自己认为重要的题。 

    第一章 : 
    全部重要 (1.6, 1.7 Leetcode上有)。 
    1.5 面A碰到 (string compression) 
    1.7面Z碰到 (set 0) 
    1.8面Bigfish碰到 (string rotation) 

    第二章 (2.4, 2.5 Leetcode上有): 
    全部重要。 
    2.2面Bigfish碰到 (find kth) 

    第三章 : 
    感觉就是3.2 (min stack), 3.5 (two stack queue) 重要。两道题面M被问到过。3.6 
    (sort stack)感觉也有可能被考到。 

    第四章 (4.1, 4.3, 4.5 Leetcode上有): 
    感觉4.2, 4.3, 4.5,4.6, 4.7 重要。4.5 (valid BST)面E,Q碰到过 

    第五章:5.4 (n & (n-1)) 

    第六章:6.5 (drop egg) 

    第七章:7.3 (line intersection),7.6 (line passes most points) 

    第八章:8.4 (parking lot), 8.10 (hashtable) 

    第九章 (9.1, 9.2, 9.5, 9.6,9.8,9.9 Leetcode上有): 
    感觉都重要 (9.10 (stack of boxes), 9.11 (boolean expression) 貌似可以忽略 
    )。 

    第十章(10.1, 10.2, 10.3 Leetcode上有): 
    10.1 (merge) M碰到过两次 
    10.3 
    10.4 (external sort) E碰到 
    10.6 

    第十七章(17.8, 17.12, 17.13 Leetcode上有): 
    17.1 (swap number) 
    17.2 (tic-tac-toe) 面I遇到过 
    17.7 (integer->english) 
    17.8 (largest sum) 经典, 注意变形题 (largest product), 面RF碰到过 
    17.9 (frequency of occurrences) S碰到 
    17.11 (rand7) 
    17.12 (2 sum) G碰到 
    17.13 (BT -> Linkedlist) 

    第十八章(9): 
    18.2 (shuffle deck) 貌似经典 
    18.3 (random) 
    18.4 (count 2s) 注意思路,可能会出现类似题 
    18.5 (shortest distance) 
    18.6 (quick select) 面Z, G碰到类似题 
    18.9-18.12 

    一共50道题。其他很多题可以做练习,但是面试碰到的概率不大。上边一些题面试也很 
    难碰到但是是不可不练的题,比如八皇后。另外就是别完全follow书上的答案,注意看 
    有没有bug。希望大家能补充一下自己认为重要的。

    二爷的DP总结

    不断看到有新人学习DP,想谈谈我的感受。 
    我大概是去年底,今年初开始学习DP的。以前没有一点概念。去年G电面我的时候就出 
    了一道最简单的DP题,那时我根本不知道什么是DP,在提示下用recursion做出来的, 
    没有用cache。 
    开始学习DP是在careercup 150那本书上。下面是一些感受。 

    1. careercup定义的DP就是recursion+cache。这个定义指导了我很长时间。我认为这 
    个定义是DP的初级阶段,有误导性,使得我在练习的时候发现很多题型用这个定义套不 
    上。误导性在于: 1, recursion+cache是DP不错,但是DP并不等于recursion+cache。 
    2, recursion的DP并不优化,因此从recursion出发做DP不是个好思路。 

    2. 我后来理解的DP是这样子的。很简单就是推DP公式。也就是说怎么用F(n-i) 推导出 
    F(n)来。当然这也是最难的。发现很多难题还是很难想到这个公式的,可能就得多练习 
    了,培养思路。这个定义跟careercup上的不一样的地方主要是思考的方式不同,一个 
    是推公式,一个是找recursion的办法。而DP的关键是推公式,如果从recursion出发的 
    话,很多题可能做不出来。 

    做DP题需要注意两点: 
    1. 能用iteration就不要用recursion。这也证明了careercup上的定义有局限性了。 
    2. DP是用空间换时间。所以DP题做熟了,应该考虑怎样优化空间了。能用常数空间就 
    不要用O(n), 能用O(n)就不要用O(n^2).  (我觉得这也是Vissa的霸气所在。Vissa面F 
    的时候说过“这么简单的DP题,我从来都是用常数空间”)。 

    最后就是多做题才能培养思路。一般面试应该不会有很难的DP题,多练习一下有了思路 
    ,再能写出iteration和空间优化的解法,并且能保证少bug的话,应该面试就差不多了。

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  • 原文地址:https://www.cnblogs.com/charlesblc/p/6126756.html
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