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与#270的题目将被收录，并且#275出现频率大于#270；而对于题号#1011与#1182的题目，因为出现频率太低，将不被收录：

撸起键盘加油干！祝大家成功上岸！整理不易，点个赞吧！

---

数组篇-132题(Array, 132 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	#4	Median of Two Sorted Arrays	0.372	困难
3	#15	3Sum	0.262	中等
4	#53	Maximum Subarray	0.499	简单
5	#42	Trapping Rain Water	0.495	困难
6	#11	Container With Most Water	0.622	中等
7	#85	Maximal Rectangle	0.449	困难
8	#16	3Sum Closest	0.435	中等
9	#31	Next Permutation	0.33	中等
10	#26	Remove Duplicates from Sorted Array	0.493	简单
11	#717	1-bit and 2-bit Characters	0.471	简单
12	#59	Spiral Matrix II	0.769	中等
13	#78	Subsets	0.769	中等
14	#39	Combination Sum	0.686	中等
15	#121	Best Time to Buy and Sell Stock	0.538	简单
16	#45	Jump Game II	0.335	困难
17	#88	Merge Sorted Array	0.471	简单
18	#18	4Sum	0.374	中等
19	#64	Minimum Path Sum	0.651	中等
20	#56	Merge Intervals	0.407	中等
21	#118	Pascal’s Triangle	0.66	简单
22	#561	Array Partition I	0.7	简单
23	#167	Two Sum II - Input array is sorted	0.531	简单
24	#128	Longest Consecutive Sequence	0.483	困难
25	#120	Triangle	0.641	中等
26	#169	Majority Element	0.628	简单
27	#48	Rotate Image	0.674	中等
28	#442	Find All Duplicates in an Array	0.644	中等
29	#289	Game of Life	0.696	中等
30	#105	Construct Binary Tree from Preorder and Inorder Traversal	0.646	中等
31	#238	Product of Array Except Self	0.671	中等
32	#41	First Missing Positive	0.378	困难
33	#287	Find the Duplicate Number	0.635	中等
34	#621	Task Scheduler	0.481	中等
35	#718	Maximum Length of Repeated Subarray	0.492	中等
36	#54	Spiral Matrix	0.392	中等
37	#941	Valid Mountain Array	0.351	简单
38	#747	Largest Number At Least Twice of Others	0.39	简单
39	#122	Best Time to Buy and Sell Stock II	0.584	简单
40	#560	Subarray Sum Equals K	0.443	中等
41	#448	Find All Numbers Disappeared in an Array	0.572	简单
42	#75	Sort Colors	0.547	中等
43	#628	Maximum Product of Three Numbers	0.494	简单
44	#66	Plus One	0.436	简单
45	#33	Search in Rotated Sorted Array	0.365	中等
46	#55	Jump Game	0.385	中等
47	#27	Remove Element	0.578	简单
48	#283	Move Zeroes	0.601	简单
49	#62	Unique Paths	0.596	中等
50	#216	Combination Sum III	0.705	中等
51	#79	Word Search	0.41	中等
52	#689	Maximum Sum of 3 Non-Overlapping Subarrays	0.445	困难
53	#695	Max Area of Island	0.632	中等
54	#697	Degree of an Array	0.521	简单
55	#268	Missing Number	0.548	简单
56	#152	Maximum Product Subarray	0.377	中等
57	#35	Search Insert Position	0.453	简单
58	#229	Majority Element II	0.428	中等
59	#123	Best Time to Buy and Sell Stock III	0.422	困难
60	#119	Pascal’s Triangle II	0.605	简单
61	#90	Subsets II	0.595	中等
62	#84	Largest Rectangle in Histogram	0.392	困难
63	#189	Rotate Array	0.409	简单
64	#209	Minimum Size Subarray Sum	0.418	中等
65	#57	Insert Interval	0.371	困难
66	#1217	Play with Chips	0.678	简单
67	#665	Non-decreasing Array	0.221	简单
68	#34	Find First and Last Position of Element in Sorted Array	0.392	中等
69	#661	Image Smoother	0.529	简单
70	#153	Find Minimum in Rotated Sorted Array	0.502	中等
71	#217	Contains Duplicate	0.518	简单
72	#667	Beautiful Arrangement II	0.592	中等
73	#73	Set Matrix Zeroes	0.552	中等
74	#219	Contains Duplicate II	0.379	简单
75	#40	Combination Sum II	0.609	中等
76	#714	Best Time to Buy and Sell Stock with Transaction Fee	0.635	中等
77	#81	Search in Rotated Sorted Array II	0.352	中等
78	#581	Shortest Unsorted Continuous Subarray	0.343	简单
79	#495	Teemo Attacking	0.531	中等
80	#162	Find Peak Element	0.453	中等
81	#905	Sort Array By Parity	0.684	简单
82	#611	Valid Triangle Number	0.483	中等
83	#106	Construct Binary Tree from Inorder and Postorder Traversal	0.675	中等
84	#1013	Partition Array Into Three Parts With Equal Sum	0.408	简单
85	#63	Unique Paths II	0.326	中等
86	#565	Array Nesting	0.567	中等
87	#414	Third Maximum Number	0.347	简单
88	#228	Summary Ranges	0.517	中等
89	#485	Max Consecutive Ones	0.561	简单
90	#566	Reshape the Matrix	0.643	简单
91	#670	Maximum Swap	0.4	中等
92	#870	Advantage Shuffle	0.37	中等
93	#713	Subarray Product Less Than K	0.349	中等
94	#643	Maximum Average Subarray I	0.381	简单
95	#80	Remove Duplicates from Sorted Array II	0.547	中等
96	#280	Wiggle Sort	0.684	中等
97	#605	Can Place Flowers	0.315	简单
98	#719	Find K-th Smallest Pair Distance	0.316	困难
99	#950	Reveal Cards In Increasing Order	0.755	中等
100	#74	Search a 2D Matrix	0.376	中等
101	#126	Word Ladder II	0.318	困难
102	#154	Find Minimum in Rotated Sorted Array II	0.478	困难
103	#1329	Sort the Matrix Diagonally	0.752	中等
104	#729	My Calendar I	0.461	中等
105	#644	Maximum Average Subarray II	0.336	困难
106	#674	Longest Continuous Increasing Subsequence	0.444	简单
107	#548	Split Array with Equal Sum	0.341	中等
108	#381	Insert Delete GetRandom O(1) - Duplicates allowed	0.369	困难
109	#532	K-diff Pairs in an Array	0.34	简单
110	#457	Circular Array Loop	0.332	中等
111	#962	Maximum Width Ramp	0.368	中等
112	#1031	Maximum Sum of Two Non-Overlapping Subarrays	0.508	中等
113	#245	Shortest Word Distance III	0.623	中等
114	#724	Find Pivot Index	0.366	简单
115	#1002	Find Common Characters	0.667	简单
116	#380	Insert Delete GetRandom O(1)	0.478	中等
117	#954	Array of Doubled Pairs	0.274	中等
118	#1386	Cinema Seat Allocation	0.239	中等
119	#163	Missing Ranges	0.248	中等
120	#370	Range Addition	0.651	中等
121	#243	Shortest Word Distance	0.64	简单
122	#277	Find the Celebrity	0.565	中等
123	#259	3Sum Smaller	0.557	中等
124	#1074	Number of Submatrices That Sum to Target	0.435	困难
125	#562	Longest Line of Consecutive One in Matrix	0.394	中等
126	#533	Lonely Pixel II	0.454	中等
127	#978	Longest Turbulent Subarray	0.392	中等
128	#1287	Element Appearing More Than 25% In Sorted Array	0.607	简单
129	#723	Candy Crush	0.676	中等
130	#624	Maximum Distance in Arrays	0.406	简单
131	#531	Lonely Pixel I	0.651	中等
132	#1232	Check If It Is a Straight Line	0.508	简单

相关/参考链接

leetcode-cn
leetcode