kaysss/leetcode-problem-set · Datasets at Hugging Face

acRate float64 9.28 95.3	difficulty stringclasses 3 values	frontendQuestionId int64 1 3.51k	isFavor bool 1 class	paidOnly bool 2 classes	title stringlengths 3 79	titleSlug stringlengths 3 79	topicTags stringlengths 2 153	hasSolution bool 2 classes	hasVideoSolution bool 2 classes
55.325854	Easy	1	false	false	Two Sum	two-sum	['Array', 'Hash Table']	true	true
45.704411	Medium	2	false	false	Add Two Numbers	add-two-numbers	['Linked List', 'Math', 'Recursion']	true	true
36.532662	Medium	3	false	false	Longest Substring Without Repeating Characters	longest-substring-without-repeating-characters	['Hash Table', 'String', 'Sliding Window']	true	true
43.219538	Hard	4	false	false	Median of Two Sorted Arrays	median-of-two-sorted-arrays	['Array', 'Binary Search', 'Divide and Conquer']	true	true
35.481252	Medium	5	false	false	Longest Palindromic Substring	longest-palindromic-substring	['Two Pointers', 'String', 'Dynamic Programming']	true	true
51.05351	Medium	6	false	false	Zigzag Conversion	zigzag-conversion	['String']	true	true
29.998962	Medium	7	false	false	Reverse Integer	reverse-integer	['Math']	true	true
18.883424	Medium	8	false	false	String to Integer (atoi)	string-to-integer-atoi	['String']	true	false
58.850296	Easy	9	false	false	Palindrome Number	palindrome-number	['Math']	true	true
29.057334	Hard	10	false	false	Regular Expression Matching	regular-expression-matching	['String', 'Dynamic Programming', 'Recursion']	true	false
57.386371	Medium	11	false	false	Container With Most Water	container-with-most-water	['Array', 'Two Pointers', 'Greedy']	true	true
68.079313	Medium	12	false	false	Integer to Roman	integer-to-roman	['Hash Table', 'Math', 'String']	true	true
64.401395	Easy	13	false	false	Roman to Integer	roman-to-integer	['Hash Table', 'Math', 'String']	true	true
45.091055	Easy	14	false	false	Longest Common Prefix	longest-common-prefix	['String', 'Trie']	true	true
36.6551	Medium	15	false	false	3Sum	3sum	['Array', 'Two Pointers', 'Sorting']	true	true
46.686252	Medium	16	false	false	3Sum Closest	3sum-closest	['Array', 'Two Pointers', 'Sorting']	true	true
63.35228	Medium	17	false	false	Letter Combinations of a Phone Number	letter-combinations-of-a-phone-number	['Hash Table', 'String', 'Backtracking']	true	false
37.795272	Medium	18	false	false	4Sum	4sum	['Array', 'Two Pointers', 'Sorting']	true	false
48.391382	Medium	19	false	false	Remove Nth Node From End of List	remove-nth-node-from-end-of-list	['Linked List', 'Two Pointers']	true	true
42.014175	Easy	20	false	false	Valid Parentheses	valid-parentheses	['String', 'Stack']	true	true
66.479773	Easy	21	false	false	Merge Two Sorted Lists	merge-two-sorted-lists	['Linked List', 'Recursion']	true	true
76.738586	Medium	22	false	false	Generate Parentheses	generate-parentheses	['String', 'Dynamic Programming', 'Backtracking']	true	true
56.139933	Hard	23	false	false	Merge k Sorted Lists	merge-k-sorted-lists	['Linked List', 'Divide and Conquer', 'Heap (Priority Queue)', 'Merge Sort']	true	true
66.737488	Medium	24	false	false	Swap Nodes in Pairs	swap-nodes-in-pairs	['Linked List', 'Recursion']	true	false
62.380603	Hard	25	false	false	Reverse Nodes in k-Group	reverse-nodes-in-k-group	['Linked List', 'Recursion']	true	false
59.790432	Easy	26	false	false	Remove Duplicates from Sorted Array	remove-duplicates-from-sorted-array	['Array', 'Two Pointers']	true	true
59.670014	Easy	27	false	false	Remove Element	remove-element	['Array', 'Two Pointers']	true	true
44.642728	Easy	28	false	false	Find the Index of the First Occurrence in a String	find-the-index-of-the-first-occurrence-in-a-string	['Two Pointers', 'String', 'String Matching']	true	true
18.228505	Medium	29	false	false	Divide Two Integers	divide-two-integers	['Math', 'Bit Manipulation']	true	false
32.855747	Hard	30	false	false	Substring with Concatenation of All Words	substring-with-concatenation-of-all-words	['Hash Table', 'String', 'Sliding Window']	true	true
42.572861	Medium	31	false	false	Next Permutation	next-permutation	['Array', 'Two Pointers']	true	true
35.884709	Hard	32	false	false	Longest Valid Parentheses	longest-valid-parentheses	['String', 'Dynamic Programming', 'Stack']	true	false
42.497616	Medium	33	false	false	Search in Rotated Sorted Array	search-in-rotated-sorted-array	['Array', 'Binary Search']	true	false
46.373327	Medium	34	false	false	Find First and Last Position of Element in Sorted Array	find-first-and-last-position-of-element-in-sorted-array	['Array', 'Binary Search']	true	false
48.563383	Easy	35	false	false	Search Insert Position	search-insert-position	['Array', 'Binary Search']	true	true
61.881058	Medium	36	false	false	Valid Sudoku	valid-sudoku	['Array', 'Hash Table', 'Matrix']	true	false
63.706361	Hard	37	false	false	Sudoku Solver	sudoku-solver	['Array', 'Hash Table', 'Backtracking', 'Matrix']	true	false
58.16384	Medium	38	false	false	Count and Say	count-and-say	['String']	true	false
74.174829	Medium	39	false	false	Combination Sum	combination-sum	['Array', 'Backtracking']	true	true
57.334587	Medium	40	false	false	Combination Sum II	combination-sum-ii	['Array', 'Backtracking']	true	false
40.790748	Hard	41	false	false	First Missing Positive	first-missing-positive	['Array', 'Hash Table']	true	false
64.548006	Hard	42	false	false	Trapping Rain Water	trapping-rain-water	['Array', 'Two Pointers', 'Dynamic Programming', 'Stack', 'Monotonic Stack']	true	false
41.992784	Medium	43	false	false	Multiply Strings	multiply-strings	['Math', 'String', 'Simulation']	true	false
29.521067	Hard	44	false	false	Wildcard Matching	wildcard-matching	['String', 'Dynamic Programming', 'Greedy', 'Recursion']	true	false
41.238357	Medium	45	false	false	Jump Game II	jump-game-ii	['Array', 'Dynamic Programming', 'Greedy']	true	false
80.322238	Medium	46	false	false	Permutations	permutations	['Array', 'Backtracking']	true	false
61.194967	Medium	47	false	false	Permutations II	permutations-ii	['Array', 'Backtracking', 'Sorting']	true	false
77.413957	Medium	48	false	false	Rotate Image	rotate-image	['Array', 'Math', 'Matrix']	true	false
70.557266	Medium	49	false	false	Group Anagrams	group-anagrams	['Array', 'Hash Table', 'String', 'Sorting']	true	true
36.682078	Medium	50	false	false	Pow(x, n)	powx-n	['Math', 'Recursion']	true	false
72.03651	Hard	51	false	false	N-Queens	n-queens	['Array', 'Backtracking']	true	false
76.262056	Hard	52	false	false	N-Queens II	n-queens-ii	['Backtracking']	true	false
51.856984	Medium	53	false	false	Maximum Subarray	maximum-subarray	['Array', 'Divide and Conquer', 'Dynamic Programming']	true	true
53.285437	Medium	54	false	false	Spiral Matrix	spiral-matrix	['Array', 'Matrix', 'Simulation']	true	false
39.208807	Medium	55	false	false	Jump Game	jump-game	['Array', 'Dynamic Programming', 'Greedy']	true	false
49.017819	Medium	56	false	false	Merge Intervals	merge-intervals	['Array', 'Sorting']	true	true
43.116101	Medium	57	false	false	Insert Interval	insert-interval	['Array']	true	false
55.759145	Easy	58	false	false	Length of Last Word	length-of-last-word	['String']	true	false
73.11257	Medium	59	false	false	Spiral Matrix II	spiral-matrix-ii	['Array', 'Matrix', 'Simulation']	true	false
49.398539	Hard	60	false	false	Permutation Sequence	permutation-sequence	['Math', 'Recursion']	true	false
39.586165	Medium	61	false	false	Rotate List	rotate-list	['Linked List', 'Two Pointers']	true	false
65.530065	Medium	62	false	false	Unique Paths	unique-paths	['Math', 'Dynamic Programming', 'Combinatorics']	true	false
42.879814	Medium	63	false	false	Unique Paths II	unique-paths-ii	['Array', 'Dynamic Programming', 'Matrix']	true	false
66.059154	Medium	64	false	false	Minimum Path Sum	minimum-path-sum	['Array', 'Dynamic Programming', 'Matrix']	true	false
21.254069	Hard	65	false	false	Valid Number	valid-number	['String']	true	false
47.217954	Easy	66	false	false	Plus One	plus-one	['Array', 'Math']	true	false
55.355352	Easy	67	false	false	Add Binary	add-binary	['Math', 'String', 'Bit Manipulation', 'Simulation']	true	false
47.470019	Hard	68	false	false	Text Justification	text-justification	['Array', 'String', 'Simulation']	true	false
40.148463	Easy	69	false	false	Sqrt(x)	sqrtx	['Math', 'Binary Search']	true	true
53.405867	Easy	70	false	false	Climbing Stairs	climbing-stairs	['Math', 'Dynamic Programming', 'Memoization']	true	false
47.036543	Medium	71	false	false	Simplify Path	simplify-path	['String', 'Stack']	true	true
58.372539	Medium	72	false	false	Edit Distance	edit-distance	['String', 'Dynamic Programming']	true	false
59.237687	Medium	73	false	false	Set Matrix Zeroes	set-matrix-zeroes	['Array', 'Hash Table', 'Matrix']	true	false
51.936158	Medium	74	false	false	Search a 2D Matrix	search-a-2d-matrix	['Array', 'Binary Search', 'Matrix']	true	false
66.625849	Medium	75	false	false	Sort Colors	sort-colors	['Array', 'Two Pointers', 'Sorting']	true	false
44.889273	Hard	76	false	false	Minimum Window Substring	minimum-window-substring	['Hash Table', 'String', 'Sliding Window']	true	false
72.489057	Medium	77	false	false	Combinations	combinations	['Backtracking']	true	false
80.461669	Medium	78	false	false	Subsets	subsets	['Array', 'Backtracking', 'Bit Manipulation']	true	true
44.828069	Medium	79	false	false	Word Search	word-search	['Array', 'String', 'Backtracking', 'Depth-First Search', 'Matrix']	true	false
62.473537	Medium	80	false	false	Remove Duplicates from Sorted Array II	remove-duplicates-from-sorted-array-ii	['Array', 'Two Pointers']	true	false
38.671604	Medium	81	false	false	Search in Rotated Sorted Array II	search-in-rotated-sorted-array-ii	['Array', 'Binary Search']	true	false
49.453779	Medium	82	false	false	Remove Duplicates from Sorted List II	remove-duplicates-from-sorted-list-ii	['Linked List', 'Two Pointers']	true	false
54.526306	Easy	83	false	false	Remove Duplicates from Sorted List	remove-duplicates-from-sorted-list	['Linked List']	true	true
46.827895	Hard	84	false	false	Largest Rectangle in Histogram	largest-rectangle-in-histogram	['Array', 'Stack', 'Monotonic Stack']	true	true
53.112068	Hard	85	false	false	Maximal Rectangle	maximal-rectangle	['Array', 'Dynamic Programming', 'Stack', 'Matrix', 'Monotonic Stack']	true	false
58.533831	Medium	86	false	false	Partition List	partition-list	['Linked List', 'Two Pointers']	true	false
41.82101	Hard	87	false	false	Scramble String	scramble-string	['String', 'Dynamic Programming']	true	false
52.484484	Easy	88	false	false	Merge Sorted Array	merge-sorted-array	['Array', 'Two Pointers', 'Sorting']	true	true
61.388009	Medium	89	false	false	Gray Code	gray-code	['Math', 'Backtracking', 'Bit Manipulation']	true	false
59.082208	Medium	90	false	false	Subsets II	subsets-ii	['Array', 'Backtracking', 'Bit Manipulation']	true	false
36.241526	Medium	91	false	false	Decode Ways	decode-ways	['String', 'Dynamic Programming']	true	true
49.262116	Medium	92	false	false	Reverse Linked List II	reverse-linked-list-ii	['Linked List']	true	true
52.602254	Medium	93	false	false	Restore IP Addresses	restore-ip-addresses	['String', 'Backtracking']	true	false
78.205897	Easy	94	false	false	Binary Tree Inorder Traversal	binary-tree-inorder-traversal	['Stack', 'Tree', 'Depth-First Search', 'Binary Tree']	true	false
59.960737	Medium	95	false	false	Unique Binary Search Trees II	unique-binary-search-trees-ii	['Dynamic Programming', 'Backtracking', 'Tree', 'Binary Search Tree', 'Binary Tree']	true	false
62.223596	Medium	96	false	false	Unique Binary Search Trees	unique-binary-search-trees	['Math', 'Dynamic Programming', 'Tree', 'Binary Search Tree', 'Binary Tree']	true	false
41.579849	Medium	97	false	false	Interleaving String	interleaving-string	['String', 'Dynamic Programming']	true	false
34.110568	Medium	98	false	false	Validate Binary Search Tree	validate-binary-search-tree	['Tree', 'Depth-First Search', 'Binary Search Tree', 'Binary Tree']	true	true
55.707581	Medium	99	false	false	Recover Binary Search Tree	recover-binary-search-tree	['Tree', 'Depth-First Search', 'Binary Search Tree', 'Binary Tree']	true	false
64.63722	Easy	100	false	false	Same Tree	same-tree	['Tree', 'Depth-First Search', 'Breadth-First Search', 'Binary Tree']	true	true

55.325854

Easy

1

false

Two Sum

two-sum

['Array', 'Hash Table']

true

45.704411

Medium

2

false

Add Two Numbers

add-two-numbers

['Linked List', 'Math', 'Recursion']

true

36.532662

Medium

3

false

Longest Substring Without Repeating Characters

longest-substring-without-repeating-characters

['Hash Table', 'String', 'Sliding Window']

true

43.219538

Hard

4

false

Median of Two Sorted Arrays

median-of-two-sorted-arrays

['Array', 'Binary Search', 'Divide and Conquer']

true

35.481252

Medium

5

false

Longest Palindromic Substring

longest-palindromic-substring

['Two Pointers', 'String', 'Dynamic Programming']

true

51.05351

Medium

6

false

Zigzag Conversion

zigzag-conversion

['String']

true

29.998962

Medium

7

false

Reverse Integer

reverse-integer

['Math']

true

18.883424

Medium

8

false

String to Integer (atoi)

string-to-integer-atoi

['String']

true

false

58.850296

Easy

9

false

Palindrome Number

palindrome-number

['Math']

true

29.057334

Hard

10

false

Regular Expression Matching

regular-expression-matching

['String', 'Dynamic Programming', 'Recursion']

true

false

57.386371

Medium

11

false

Container With Most Water

container-with-most-water

['Array', 'Two Pointers', 'Greedy']

true

68.079313

Medium

12

false

Integer to Roman

integer-to-roman

['Hash Table', 'Math', 'String']

true

64.401395

Easy

13

false

Roman to Integer

roman-to-integer

['Hash Table', 'Math', 'String']

true

45.091055

Easy

14

false

Longest Common Prefix

longest-common-prefix

['String', 'Trie']

true

36.6551

Medium

15

false

3Sum

3sum

['Array', 'Two Pointers', 'Sorting']

true

46.686252

Medium

16

false

3Sum Closest

3sum-closest

['Array', 'Two Pointers', 'Sorting']

true

63.35228

Medium

17

false

Letter Combinations of a Phone Number

letter-combinations-of-a-phone-number

['Hash Table', 'String', 'Backtracking']

true

false

37.795272

Medium

18

false

4Sum

4sum

['Array', 'Two Pointers', 'Sorting']

true

false

48.391382

Medium

19

false

Remove Nth Node From End of List

remove-nth-node-from-end-of-list

['Linked List', 'Two Pointers']

true

42.014175

Easy

20

false

Valid Parentheses

valid-parentheses

['String', 'Stack']

true

66.479773

Easy

21

false

Merge Two Sorted Lists

merge-two-sorted-lists

['Linked List', 'Recursion']

true

76.738586

Medium

22

false

Generate Parentheses

generate-parentheses

['String', 'Dynamic Programming', 'Backtracking']

true

56.139933

Hard

23

false

Merge k Sorted Lists

merge-k-sorted-lists

['Linked List', 'Divide and Conquer', 'Heap (Priority Queue)', 'Merge Sort']

true

66.737488

Medium

24

false

Swap Nodes in Pairs

swap-nodes-in-pairs

['Linked List', 'Recursion']

true

false

62.380603

Hard

25

false

Reverse Nodes in k-Group

reverse-nodes-in-k-group

['Linked List', 'Recursion']

true

false

59.790432

Easy

26

false

Remove Duplicates from Sorted Array

remove-duplicates-from-sorted-array

['Array', 'Two Pointers']

true

59.670014

Easy

27

false

Remove Element

remove-element

['Array', 'Two Pointers']

true

44.642728

Easy

28

false

Find the Index of the First Occurrence in a String

find-the-index-of-the-first-occurrence-in-a-string

['Two Pointers', 'String', 'String Matching']

true

18.228505

Medium

29

false

Divide Two Integers

divide-two-integers

['Math', 'Bit Manipulation']

true

false

32.855747

Hard

30

false

Substring with Concatenation of All Words

substring-with-concatenation-of-all-words

['Hash Table', 'String', 'Sliding Window']

true

42.572861

Medium

31

false

Next Permutation

next-permutation

['Array', 'Two Pointers']

true

35.884709

Hard

32

false

Longest Valid Parentheses

longest-valid-parentheses

['String', 'Dynamic Programming', 'Stack']

true

false

42.497616

Medium

33

false

Search in Rotated Sorted Array

search-in-rotated-sorted-array

['Array', 'Binary Search']

true

false

46.373327

Medium

34

false

Find First and Last Position of Element in Sorted Array

find-first-and-last-position-of-element-in-sorted-array

['Array', 'Binary Search']

true

false

48.563383

Easy

35

false

Search Insert Position

search-insert-position

['Array', 'Binary Search']

true

61.881058

Medium

36

false

Valid Sudoku

valid-sudoku

['Array', 'Hash Table', 'Matrix']

true

false

63.706361

Hard

37

false

Sudoku Solver

sudoku-solver

['Array', 'Hash Table', 'Backtracking', 'Matrix']

true

false

58.16384

Medium

38

false

Count and Say

count-and-say

['String']

true

false

74.174829

Medium

39

false

Combination Sum

combination-sum

['Array', 'Backtracking']

true

57.334587

Medium

40

false

Combination Sum II

combination-sum-ii

['Array', 'Backtracking']

true

false

40.790748

Hard

41

false

First Missing Positive

first-missing-positive

['Array', 'Hash Table']

true

false

64.548006

Hard

42

false

Trapping Rain Water

trapping-rain-water

['Array', 'Two Pointers', 'Dynamic Programming', 'Stack', 'Monotonic Stack']

true

false

41.992784

Medium

43

false

Multiply Strings

multiply-strings

['Math', 'String', 'Simulation']

true

false

29.521067

Hard

44

false

Wildcard Matching

wildcard-matching

['String', 'Dynamic Programming', 'Greedy', 'Recursion']

true

false

41.238357

Medium

45

false

Jump Game II

jump-game-ii

['Array', 'Dynamic Programming', 'Greedy']

true

false

80.322238

Medium

46

false

Permutations

permutations

['Array', 'Backtracking']

true

false

61.194967

Medium

47

false

Permutations II

permutations-ii

['Array', 'Backtracking', 'Sorting']

true

false

77.413957

Medium

48

false

Rotate Image

rotate-image

['Array', 'Math', 'Matrix']

true

false

70.557266

Medium

49

false

Group Anagrams

group-anagrams

['Array', 'Hash Table', 'String', 'Sorting']

true

36.682078

Medium

50

false

Pow(x, n)

powx-n

['Math', 'Recursion']

true

false

72.03651

Hard

51

false

N-Queens

n-queens

['Array', 'Backtracking']

true

false

76.262056

Hard

52

false

N-Queens II

n-queens-ii

['Backtracking']

true

false

51.856984

Medium

53

false

Maximum Subarray

maximum-subarray

['Array', 'Divide and Conquer', 'Dynamic Programming']

true

53.285437

Medium

54

false

Spiral Matrix

spiral-matrix

['Array', 'Matrix', 'Simulation']

true

false

39.208807

Medium

55

false

Jump Game

jump-game

['Array', 'Dynamic Programming', 'Greedy']

true

false

49.017819

Medium

56

false

Merge Intervals

merge-intervals

['Array', 'Sorting']

true

43.116101

Medium

57

false

Insert Interval

insert-interval

['Array']

true

false

55.759145

Easy

58

false

Length of Last Word

length-of-last-word

['String']

true

false

73.11257

Medium

59

false

Spiral Matrix II

spiral-matrix-ii

['Array', 'Matrix', 'Simulation']

true

false

49.398539

Hard

60

false

Permutation Sequence

permutation-sequence

['Math', 'Recursion']

true

false

39.586165

Medium

61

false

Rotate List

rotate-list

['Linked List', 'Two Pointers']

true

false

65.530065

Medium

62

false

Unique Paths

unique-paths

['Math', 'Dynamic Programming', 'Combinatorics']

true

false

42.879814

Medium

63

false

Unique Paths II

unique-paths-ii

['Array', 'Dynamic Programming', 'Matrix']

true

false

66.059154

Medium

64

false

Minimum Path Sum

minimum-path-sum

['Array', 'Dynamic Programming', 'Matrix']

true

false

21.254069

Hard

65

false

Valid Number

valid-number

['String']

true

false

47.217954

Easy

66

false

Plus One

plus-one

['Array', 'Math']

true

false

55.355352

Easy

67

false

Add Binary

add-binary

['Math', 'String', 'Bit Manipulation', 'Simulation']

true

false

47.470019

Hard

68

false

Text Justification

text-justification

['Array', 'String', 'Simulation']

true

false

40.148463

Easy

69

false

Sqrt(x)

sqrtx

['Math', 'Binary Search']

true

53.405867

Easy

70

false

Climbing Stairs

climbing-stairs

['Math', 'Dynamic Programming', 'Memoization']

true

false

47.036543

Medium

71

false

Simplify Path

simplify-path

['String', 'Stack']

true

58.372539

Medium

72

false

Edit Distance

edit-distance

['String', 'Dynamic Programming']

true

false

59.237687

Medium

73

false

Set Matrix Zeroes

set-matrix-zeroes

['Array', 'Hash Table', 'Matrix']

true

false

51.936158

Medium

74

false

Search a 2D Matrix

search-a-2d-matrix

['Array', 'Binary Search', 'Matrix']

true

false

66.625849

Medium

75

false

Sort Colors

sort-colors

['Array', 'Two Pointers', 'Sorting']

true

false

44.889273

Hard

76

false

Minimum Window Substring

minimum-window-substring

['Hash Table', 'String', 'Sliding Window']

true

false

72.489057

Medium

77

false

Combinations

combinations

['Backtracking']

true

false

80.461669

Medium

78

false

Subsets

subsets

['Array', 'Backtracking', 'Bit Manipulation']

true

44.828069

Medium

79

false

Word Search

word-search

['Array', 'String', 'Backtracking', 'Depth-First Search', 'Matrix']

true

false

62.473537

Medium

80

false

Remove Duplicates from Sorted Array II

remove-duplicates-from-sorted-array-ii

['Array', 'Two Pointers']

true

false

38.671604

Medium

81

false

Search in Rotated Sorted Array II

search-in-rotated-sorted-array-ii

['Array', 'Binary Search']

true

false

49.453779

Medium

82

false

Remove Duplicates from Sorted List II

remove-duplicates-from-sorted-list-ii

['Linked List', 'Two Pointers']

true

false

54.526306

Easy

83

false

Remove Duplicates from Sorted List

remove-duplicates-from-sorted-list

['Linked List']

true

46.827895

Hard

84

false

Largest Rectangle in Histogram

largest-rectangle-in-histogram

['Array', 'Stack', 'Monotonic Stack']

true

53.112068

Hard

85

false

Maximal Rectangle

maximal-rectangle

['Array', 'Dynamic Programming', 'Stack', 'Matrix', 'Monotonic Stack']

true

false

58.533831

Medium

86

false

Partition List

partition-list

['Linked List', 'Two Pointers']

true

false

41.82101

Hard

87

false

Scramble String

scramble-string

['String', 'Dynamic Programming']

true

false

52.484484

Easy

88

false

Merge Sorted Array

merge-sorted-array

['Array', 'Two Pointers', 'Sorting']

true

61.388009

Medium

89

false

Gray Code

gray-code

['Math', 'Backtracking', 'Bit Manipulation']

true

false

59.082208

Medium

90

false

Subsets II

subsets-ii

['Array', 'Backtracking', 'Bit Manipulation']

true

false

36.241526

Medium

91

false

Decode Ways

decode-ways

['String', 'Dynamic Programming']

true

49.262116

Medium

92

false

Reverse Linked List II

reverse-linked-list-ii

['Linked List']

true

52.602254

Medium

93

false

Restore IP Addresses

restore-ip-addresses

['String', 'Backtracking']

true

false

78.205897

Easy

94

false

Binary Tree Inorder Traversal

binary-tree-inorder-traversal

['Stack', 'Tree', 'Depth-First Search', 'Binary Tree']

true

false

59.960737

Medium

95

false

Unique Binary Search Trees II

unique-binary-search-trees-ii

['Dynamic Programming', 'Backtracking', 'Tree', 'Binary Search Tree', 'Binary Tree']

true

false

62.223596

Medium

96

false

Unique Binary Search Trees

unique-binary-search-trees

['Math', 'Dynamic Programming', 'Tree', 'Binary Search Tree', 'Binary Tree']

true

false

41.579849

Medium

97

false

Interleaving String

interleaving-string

['String', 'Dynamic Programming']

true

false

34.110568

Medium

98

false

Validate Binary Search Tree

validate-binary-search-tree

['Tree', 'Depth-First Search', 'Binary Search Tree', 'Binary Tree']

true

55.707581

Medium

99

false

Recover Binary Search Tree

recover-binary-search-tree

['Tree', 'Depth-First Search', 'Binary Search Tree', 'Binary Tree']

true

false

64.63722

Easy

100

false

Same Tree

same-tree

['Tree', 'Depth-First Search', 'Breadth-First Search', 'Binary Tree']

true