【leetcode】高频题目整理_哈希表篇( High Frequency Problems, Hash Table )

截止至今LeetCode题目总量已经有1582题,估计将来每年平均增长300题左右,大部分人肯定是刷不完的,所以得有选择地刷LeetCode。

一种公认的刷题策略是按类别刷题,可是每个类别也有许多题,在有限的时间里到底该刷哪些题呢?个人根据LeetCode官方给出的每个题目的出现频率,整理并收录了每个类别里高频出现的题目,对于官方统计频率太低的题目,不予收录,最终得到了这个高频题目表格。

例如,对于下图中题号#275#270的题目将被收录,并且#275出现频率大于#270;而对于题号#1011#1182的题目,因为出现频率太低,将不被收录:【leetcode】高频题目整理_哈希表篇( High Frequency Problems, Hash Table )

撸起键盘加油干!祝大家成功上岸!整理不易,点个赞吧!


哈希表篇-81题(Hash Table, 81 problems)

数据日期: 2020/03/26 (此时LeetCode题目数量:1582)
数据来源: LeetCode官方,将不同类别的题目按照官方给的出现频率(Frequency)降序排列,取有频率统计的题。

排序 题号 题目 通过率 难度
1 #1 Two Sum 0.479 简单
2 #535 Encode and Decode TinyURL 0.812 中等
3 #3 Longest Substring Without Repeating Characters 0.335 中等
4 #85 Maximal Rectangle 0.449 困难
5 #37 Sudoku Solver 0.605 困难
6 #94 Binary Tree Inorder Traversal 0.707 中等
7 #739 Daily Temperatures 0.595 中等
8 #18 4Sum 0.374 中等
9 #136 Single Number 0.66 简单
10 #202 Happy Number 0.576 简单
11 #349 Intersection of Two Arrays 0.685 简单
12 #463 Island Perimeter 0.658 简单
13 #30 Substring with Concatenation of All Words 0.299 困难
14 #632 Smallest Range Covering Elements from K Lists 0.356 困难
15 #718 Maximum Length of Repeated Subarray 0.492 中等
16 #76 Minimum Window Substring 0.355 困难
17 #500 Keyboard Row 0.685 简单
18 #187 Repeated DNA Sequences 0.44 中等
19 #560 Subarray Sum Equals K 0.443 中等
20 #447 Number of Boomerangs 0.572 简单
21 #49 Group Anagrams 0.612 中等
22 #138 Copy List with Random Pointer 0.476 中等
23 #409 Longest Palindrome 0.549 简单
24 #690 Employee Importance 0.575 简单
25 #204 Count Primes 0.329 简单
26 #347 Top K Frequent Elements 0.607 中等
27 #525 Contiguous Array 0.416 中等
28 #726 Number of Atoms 0.437 困难
29 #36 Valid Sudoku 0.588 中等
30 #454 4Sum II 0.543 中等
31 #1044 Longest Duplicate Substring 0.175 困难
32 #781 Rabbits in Forest 0.543 中等
33 #594 Longest Harmonious Subsequence 0.461 简单
34 #389 Find the Difference 0.612 简单
35 #336 Palindrome Pairs 0.331 困难
36 #149 Max Points on a Line 0.213 困难
37 #217 Contains Duplicate 0.518 简单
38 #290 Word Pattern 0.423 简单
39 #242 Valid Anagram 0.591 简单
40 #219 Contains Duplicate II 0.379 简单
41 #274 H-Index 0.379 中等
42 #350 Intersection of Two Arrays II 0.474 简单
43 #575 Distribute Candies 0.66 简单
44 #205 Isomorphic Strings 0.473 简单
45 #299 Bulls and Cows 0.472 简单
46 #438 Find All Anagrams in a String 0.42 中等
47 #645 Set Mismatch 0.415 简单
48 #355 Design Twitter 0.367 中等
49 #508 Most Frequent Subtree Sum 0.627 中等
50 #720 Longest Word in Dictionary 0.461 简单
51 #166 Fraction to Recurring Decimal 0.258 中等
52 #648 Replace Words 0.536 中等
53 #1001 Grid Illumination 0.271 困难
54 #387 First Unique Character in a String 0.44 简单
55 #451 Sort Characters By Frequency 0.63 中等
56 #554 Brick Wall 0.358 中等
57 #676 Implement Magic Dictionary 0.565 中等
58 #692 Top K Frequent Words 0.497 中等
59 #966 Vowel Spellchecker 0.383 中等
60 #711 Number of Distinct Islands II 0.561 困难
61 #381 Insert Delete GetRandom O(1) - Duplicates allowed 0.369 困难
62 #599 Minimum Index Sum of Two Lists 0.502 简单
63 #609 Find Duplicate File in System 0.521 中等
64 #244 Shortest Word Distance II 0.494 中等
65 #380 Insert Delete GetRandom O(1) 0.478 中等
66 #311 Sparse Matrix Multiplication 0.728 中等
67 #325 Maximum Size Subarray Sum Equals k 0.477 中等
68 #159 Longest Substring with At Most Two Distinct Characters 0.51 中等
69 #314 Binary Tree Vertical Order Traversal 0.539 中等
70 #359 Logger Rate Limiter 0.691 简单
71 #694 Number of Distinct Islands 0.457 中等
72 #358 Rearrange String k Distance Apart 0.341 困难
73 #249 Group Shifted Strings 0.604 中等
74 #288 Unique Word Abbreviation 0.314 中等
75 #734 Sentence Similarity 0.488 简单
76 #340 Longest Substring with At Most K Distinct Characters 0.464 困难
77 #266 Palindrome Permutation 0.631 简单
78 #624 Maximum Distance in Arrays 0.406 简单
79 #170 Two Sum III - Data structure design 0.407 简单
80 #356 Line Reflection 0.285 中等
81 #246 Strobogrammatic Number 0.464 简单

相关/参考链接

leetcode-cn
leetcode

上一篇:3D_IOU 计算


下一篇:分布式工作流任务调度系统EasyScheduler自定义任务插件开发