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
48.996067	Hard	301	false	false	Remove Invalid Parentheses	remove-invalid-parentheses	['String', 'Backtracking', 'Breadth-First Search']	true	false
59.48578	Hard	302	false	true	Smallest Rectangle Enclosing Black Pixels	smallest-rectangle-enclosing-black-pixels	['Array', 'Binary Search', 'Depth-First Search', 'Breadth-First Search', 'Matrix']	true	false
67.697898	Easy	303	false	false	Range Sum Query - Immutable	range-sum-query-immutable	['Array', 'Design', 'Prefix Sum']	true	true
56.21715	Medium	304	false	false	Range Sum Query 2D - Immutable	range-sum-query-2d-immutable	['Array', 'Design', 'Matrix', 'Prefix Sum']	true	true
40.024561	Hard	305	false	true	Number of Islands II	number-of-islands-ii	['Array', 'Hash Table', 'Union Find']	true	false
32.373544	Medium	306	false	false	Additive Number	additive-number	['String', 'Backtracking']	false	false
41.632216	Medium	307	false	false	Range Sum Query - Mutable	range-sum-query-mutable	['Array', 'Design', 'Binary Indexed Tree', 'Segment Tree']	true	false
44.758118	Medium	308	false	true	Range Sum Query 2D - Mutable	range-sum-query-2d-mutable	['Array', 'Design', 'Binary Indexed Tree', 'Segment Tree', 'Matrix']	true	true
59.981676	Medium	309	false	false	Best Time to Buy and Sell Stock with Cooldown	best-time-to-buy-and-sell-stock-with-cooldown	['Array', 'Dynamic Programming']	true	false
41.922507	Medium	310	false	false	Minimum Height Trees	minimum-height-trees	['Depth-First Search', 'Breadth-First Search', 'Graph', 'Topological Sort']	true	false
68.636257	Medium	311	false	true	Sparse Matrix Multiplication	sparse-matrix-multiplication	['Array', 'Hash Table', 'Matrix']	true	false
60.8333	Hard	312	false	false	Burst Balloons	burst-balloons	['Array', 'Dynamic Programming']	true	false
45.401767	Medium	313	false	false	Super Ugly Number	super-ugly-number	['Array', 'Math', 'Dynamic Programming']	false	false
56.809827	Medium	314	false	true	Binary Tree Vertical Order Traversal	binary-tree-vertical-order-traversal	['Hash Table', 'Tree', 'Depth-First Search', 'Breadth-First Search', 'Sorting', 'Binary Tree']	true	false
42.730455	Hard	315	false	false	Count of Smaller Numbers After Self	count-of-smaller-numbers-after-self	['Array', 'Binary Search', 'Divide and Conquer', 'Binary Indexed Tree', 'Segment Tree', 'Merge Sort', 'Ordered Set']	true	false
50.977576	Medium	316	false	false	Remove Duplicate Letters	remove-duplicate-letters	['String', 'Stack', 'Greedy', 'Monotonic Stack']	true	false
44.144789	Hard	317	false	true	Shortest Distance from All Buildings	shortest-distance-from-all-buildings	['Array', 'Breadth-First Search', 'Matrix']	true	false
60.435039	Medium	318	false	false	Maximum Product of Word Lengths	maximum-product-of-word-lengths	['Array', 'String', 'Bit Manipulation']	true	false
53.820916	Medium	319	false	false	Bulb Switcher	bulb-switcher	['Math', 'Brainteaser']	true	false
59.965443	Medium	320	false	true	Generalized Abbreviation	generalized-abbreviation	['String', 'Backtracking', 'Bit Manipulation']	true	false
31.998009	Hard	321	false	false	Create Maximum Number	create-maximum-number	['Array', 'Two Pointers', 'Stack', 'Greedy', 'Monotonic Stack']	false	false
46.035762	Medium	322	false	false	Coin Change	coin-change	['Array', 'Dynamic Programming', 'Breadth-First Search']	true	true
63.960525	Medium	323	false	true	Number of Connected Components in an Undirected Graph	number-of-connected-components-in-an-undirected-graph	['Depth-First Search', 'Breadth-First Search', 'Union Find', 'Graph']	true	true
35.423376	Medium	324	false	false	Wiggle Sort II	wiggle-sort-ii	['Array', 'Divide and Conquer', 'Greedy', 'Sorting', 'Quickselect']	false	false
50.278305	Medium	325	false	true	Maximum Size Subarray Sum Equals k	maximum-size-subarray-sum-equals-k	['Array', 'Hash Table', 'Prefix Sum']	true	false
47.731025	Easy	326	false	false	Power of Three	power-of-three	['Math', 'Recursion']	true	false
36.756108	Hard	327	false	false	Count of Range Sum	count-of-range-sum	['Array', 'Binary Search', 'Divide and Conquer', 'Binary Indexed Tree', 'Segment Tree', 'Merge Sort', 'Ordered Set']	false	false
61.877863	Medium	328	false	false	Odd Even Linked List	odd-even-linked-list	['Linked List']	true	false
55.036278	Hard	329	false	false	Longest Increasing Path in a Matrix	longest-increasing-path-in-a-matrix	['Array', 'Dynamic Programming', 'Depth-First Search', 'Breadth-First Search', 'Graph', 'Topological Sort', 'Memoization', 'Matrix']	true	false
53.392615	Hard	330	false	false	Patching Array	patching-array	['Array', 'Greedy']	true	false
45.968824	Medium	331	false	false	Verify Preorder Serialization of a Binary Tree	verify-preorder-serialization-of-a-binary-tree	['String', 'Stack', 'Tree', 'Binary Tree']	true	false
43.454141	Hard	332	false	false	Reconstruct Itinerary	reconstruct-itinerary	['Depth-First Search', 'Graph', 'Eulerian Circuit']	false	false
45.206268	Medium	333	false	true	Largest BST Subtree	largest-bst-subtree	['Dynamic Programming', 'Tree', 'Depth-First Search', 'Binary Search Tree', 'Binary Tree']	true	false
39.144039	Medium	334	false	false	Increasing Triplet Subsequence	increasing-triplet-subsequence	['Array', 'Greedy']	true	false
31.764972	Hard	335	false	false	Self Crossing	self-crossing	['Array', 'Math', 'Geometry']	false	false
36.089906	Hard	336	false	false	Palindrome Pairs	palindrome-pairs	['Array', 'Hash Table', 'String', 'Trie']	true	false
54.774496	Medium	337	false	false	House Robber III	house-robber-iii	['Dynamic Programming', 'Tree', 'Depth-First Search', 'Binary Tree']	true	false
79.496429	Easy	338	false	false	Counting Bits	counting-bits	['Dynamic Programming', 'Bit Manipulation']	true	false
85.324738	Medium	339	false	true	Nested List Weight Sum	nested-list-weight-sum	['Depth-First Search', 'Breadth-First Search']	true	true
49.384069	Medium	340	false	true	Longest Substring with At Most K Distinct Characters	longest-substring-with-at-most-k-distinct-characters	['Hash Table', 'String', 'Sliding Window']	true	true
65.236997	Medium	341	false	false	Flatten Nested List Iterator	flatten-nested-list-iterator	['Stack', 'Tree', 'Depth-First Search', 'Design', 'Queue', 'Iterator']	true	false
49.199515	Easy	342	false	false	Power of Four	power-of-four	['Math', 'Bit Manipulation', 'Recursion']	true	false
60.9892	Medium	343	false	false	Integer Break	integer-break	['Math', 'Dynamic Programming']	true	false
79.572384	Easy	344	false	false	Reverse String	reverse-string	['Two Pointers', 'String']	true	true
57.427146	Easy	345	false	false	Reverse Vowels of a String	reverse-vowels-of-a-string	['Two Pointers', 'String']	true	true
79.746989	Easy	346	false	true	Moving Average from Data Stream	moving-average-from-data-stream	['Array', 'Design', 'Queue', 'Data Stream']	true	true
64.241056	Medium	347	false	false	Top K Frequent Elements	top-k-frequent-elements	['Array', 'Hash Table', 'Divide and Conquer', 'Sorting', 'Heap (Priority Queue)', 'Bucket Sort', 'Counting', 'Quickselect']	true	true
58.495608	Medium	348	false	true	Design Tic-Tac-Toe	design-tic-tac-toe	['Array', 'Hash Table', 'Design', 'Matrix', 'Simulation']	true	false
76.157565	Easy	349	false	false	Intersection of Two Arrays	intersection-of-two-arrays	['Array', 'Hash Table', 'Two Pointers', 'Binary Search', 'Sorting']	true	false
58.937561	Easy	350	false	false	Intersection of Two Arrays II	intersection-of-two-arrays-ii	['Array', 'Hash Table', 'Two Pointers', 'Binary Search', 'Sorting']	true	false
53.237357	Medium	351	false	true	Android Unlock Patterns	android-unlock-patterns	['Dynamic Programming', 'Backtracking', 'Bit Manipulation', 'Bitmask']	true	false
60.347101	Hard	352	false	false	Data Stream as Disjoint Intervals	data-stream-as-disjoint-intervals	['Binary Search', 'Design', 'Ordered Set']	true	false
39.069553	Medium	353	false	true	Design Snake Game	design-snake-game	['Array', 'Hash Table', 'Design', 'Queue', 'Simulation']	true	false
37.205784	Hard	354	false	false	Russian Doll Envelopes	russian-doll-envelopes	['Array', 'Binary Search', 'Dynamic Programming', 'Sorting']	true	false
41.754525	Medium	355	false	false	Design Twitter	design-twitter	['Hash Table', 'Linked List', 'Design', 'Heap (Priority Queue)']	false	false
35.898789	Medium	356	false	true	Line Reflection	line-reflection	['Array', 'Hash Table', 'Math']	false	false
54.071849	Medium	357	false	false	Count Numbers with Unique Digits	count-numbers-with-unique-digits	['Math', 'Dynamic Programming', 'Backtracking']	false	false
39.308741	Hard	358	false	true	Rearrange String k Distance Apart	rearrange-string-k-distance-apart	['Hash Table', 'String', 'Greedy', 'Sorting', 'Heap (Priority Queue)', 'Counting']	true	false
76.400692	Easy	359	false	true	Logger Rate Limiter	logger-rate-limiter	['Hash Table', 'Design', 'Data Stream']	true	true
56.877679	Medium	360	false	true	Sort Transformed Array	sort-transformed-array	['Array', 'Math', 'Two Pointers', 'Sorting']	true	false
52.040077	Medium	361	false	true	Bomb Enemy	bomb-enemy	['Array', 'Dynamic Programming', 'Matrix']	true	false
69.06354	Medium	362	false	true	Design Hit Counter	design-hit-counter	['Array', 'Binary Search', 'Design', 'Queue', 'Data Stream']	true	false
44.543562	Hard	363	false	false	Max Sum of Rectangle No Larger Than K	max-sum-of-rectangle-no-larger-than-k	['Array', 'Binary Search', 'Matrix', 'Prefix Sum', 'Ordered Set']	true	false
65.223454	Medium	364	false	true	Nested List Weight Sum II	nested-list-weight-sum-ii	['Stack', 'Depth-First Search', 'Breadth-First Search']	true	false
42.689623	Medium	365	false	false	Water and Jug Problem	water-and-jug-problem	['Math', 'Depth-First Search', 'Breadth-First Search']	false	false
80.999929	Medium	366	false	true	Find Leaves of Binary Tree	find-leaves-of-binary-tree	['Tree', 'Depth-First Search', 'Binary Tree']	true	true
44.087418	Easy	367	false	false	Valid Perfect Square	valid-perfect-square	['Math', 'Binary Search']	true	false
48.693992	Medium	368	false	false	Largest Divisible Subset	largest-divisible-subset	['Array', 'Math', 'Dynamic Programming', 'Sorting']	true	false
61.136776	Medium	369	false	true	Plus One Linked List	plus-one-linked-list	['Linked List', 'Math']	true	true
72.187313	Medium	370	false	true	Range Addition	range-addition	['Array', 'Prefix Sum']	true	false
53.348406	Medium	371	false	false	Sum of Two Integers	sum-of-two-integers	['Math', 'Bit Manipulation']	true	false
35.328438	Medium	372	false	false	Super Pow	super-pow	['Math', 'Divide and Conquer']	false	false
40.51175	Medium	373	false	false	Find K Pairs with Smallest Sums	find-k-pairs-with-smallest-sums	['Array', 'Heap (Priority Queue)']	true	false
55.404669	Easy	374	false	false	Guess Number Higher or Lower	guess-number-higher-or-lower	['Binary Search', 'Interactive']	true	true
50.823353	Medium	375	false	false	Guess Number Higher or Lower II	guess-number-higher-or-lower-ii	['Math', 'Dynamic Programming', 'Game Theory']	true	false
48.782082	Medium	376	false	false	Wiggle Subsequence	wiggle-subsequence	['Array', 'Dynamic Programming', 'Greedy']	true	false
54.57406	Medium	377	false	false	Combination Sum IV	combination-sum-iv	['Array', 'Dynamic Programming']	true	false
63.345915	Medium	378	false	false	Kth Smallest Element in a Sorted Matrix	kth-smallest-element-in-a-sorted-matrix	['Array', 'Binary Search', 'Sorting', 'Heap (Priority Queue)', 'Matrix']	true	false
52.254822	Medium	379	false	true	Design Phone Directory	design-phone-directory	['Array', 'Hash Table', 'Linked List', 'Design', 'Queue']	true	false
54.966186	Medium	380	false	false	Insert Delete GetRandom O(1)	insert-delete-getrandom-o1	['Array', 'Hash Table', 'Math', 'Design', 'Randomized']	true	false
35.843903	Hard	381	false	false	Insert Delete GetRandom O(1) - Duplicates allowed	insert-delete-getrandom-o1-duplicates-allowed	['Array', 'Hash Table', 'Math', 'Design', 'Randomized']	true	false
63.833205	Medium	382	false	false	Linked List Random Node	linked-list-random-node	['Linked List', 'Math', 'Reservoir Sampling', 'Randomized']	true	false
64.130115	Easy	383	false	false	Ransom Note	ransom-note	['Hash Table', 'String', 'Counting']	true	true
58.896139	Medium	384	false	false	Shuffle an Array	shuffle-an-array	['Array', 'Math', 'Design', 'Randomized']	true	false
39.794067	Medium	385	false	false	Mini Parser	mini-parser	['String', 'Stack', 'Depth-First Search']	false	false
73.036935	Medium	386	false	false	Lexicographical Numbers	lexicographical-numbers	['Depth-First Search', 'Trie']	true	false
63.380828	Easy	387	false	false	First Unique Character in a String	first-unique-character-in-a-string	['Hash Table', 'String', 'Queue', 'Counting']	true	true
48.209865	Medium	388	false	false	Longest Absolute File Path	longest-absolute-file-path	['String', 'Stack', 'Depth-First Search']	false	false
59.63395	Easy	389	false	false	Find the Difference	find-the-difference	['Hash Table', 'String', 'Bit Manipulation', 'Sorting']	true	false
44.662015	Medium	390	false	false	Elimination Game	elimination-game	['Math', 'Recursion']	false	false
34.909262	Hard	391	false	false	Perfect Rectangle	perfect-rectangle	['Array', 'Line Sweep']	false	false
48.273048	Easy	392	false	false	Is Subsequence	is-subsequence	['Two Pointers', 'String', 'Dynamic Programming']	true	false
45.451955	Medium	393	false	false	UTF-8 Validation	utf-8-validation	['Array', 'Bit Manipulation']	true	false
60.832597	Medium	394	false	false	Decode String	decode-string	['String', 'Stack', 'Recursion']	true	false
45.345917	Medium	395	false	false	Longest Substring with At Least K Repeating Characters	longest-substring-with-at-least-k-repeating-characters	['Hash Table', 'String', 'Divide and Conquer', 'Sliding Window']	true	false
43.729394	Medium	396	false	false	Rotate Function	rotate-function	['Array', 'Math', 'Dynamic Programming']	false	false
36.373182	Medium	397	false	false	Integer Replacement	integer-replacement	['Dynamic Programming', 'Greedy', 'Bit Manipulation', 'Memoization']	false	false
64.374519	Medium	398	false	false	Random Pick Index	random-pick-index	['Hash Table', 'Math', 'Reservoir Sampling', 'Randomized']	true	false
62.880355	Medium	399	false	false	Evaluate Division	evaluate-division	['Array', 'String', 'Depth-First Search', 'Breadth-First Search', 'Union Find', 'Graph', 'Shortest Path']	true	false
35.445441	Medium	400	false	false	Nth Digit	nth-digit	['Math', 'Binary Search']	false	false

48.996067

Hard

301

false

Remove Invalid Parentheses

remove-invalid-parentheses

['String', 'Backtracking', 'Breadth-First Search']

true

false

59.48578

Hard

302

false

true

Smallest Rectangle Enclosing Black Pixels

smallest-rectangle-enclosing-black-pixels

['Array', 'Binary Search', 'Depth-First Search', 'Breadth-First Search', 'Matrix']

true

false

67.697898

Easy

303

false

Range Sum Query - Immutable

range-sum-query-immutable

['Array', 'Design', 'Prefix Sum']

true

56.21715

Medium

304

false

Range Sum Query 2D - Immutable

range-sum-query-2d-immutable

['Array', 'Design', 'Matrix', 'Prefix Sum']

true

40.024561

Hard

305

false

true

Number of Islands II

number-of-islands-ii

['Array', 'Hash Table', 'Union Find']

true

false

32.373544

Medium

306

false

Additive Number

additive-number

['String', 'Backtracking']

false

41.632216

Medium

307

false

Range Sum Query - Mutable

range-sum-query-mutable

['Array', 'Design', 'Binary Indexed Tree', 'Segment Tree']

true

false

44.758118

Medium

308

false

true

Range Sum Query 2D - Mutable

range-sum-query-2d-mutable

['Array', 'Design', 'Binary Indexed Tree', 'Segment Tree', 'Matrix']

true

59.981676

Medium

309

false

Best Time to Buy and Sell Stock with Cooldown

best-time-to-buy-and-sell-stock-with-cooldown

['Array', 'Dynamic Programming']

true

false

41.922507

Medium

310

false

Minimum Height Trees

minimum-height-trees

['Depth-First Search', 'Breadth-First Search', 'Graph', 'Topological Sort']

true

false

68.636257

Medium

311

false

true

Sparse Matrix Multiplication

sparse-matrix-multiplication

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

true

false

60.8333

Hard

312

false

Burst Balloons

burst-balloons

['Array', 'Dynamic Programming']

true

false

45.401767

Medium

313

false

Super Ugly Number

super-ugly-number

['Array', 'Math', 'Dynamic Programming']

false

56.809827

Medium

314

false

true

Binary Tree Vertical Order Traversal

binary-tree-vertical-order-traversal

['Hash Table', 'Tree', 'Depth-First Search', 'Breadth-First Search', 'Sorting', 'Binary Tree']

true

false

42.730455

Hard

315

false

Count of Smaller Numbers After Self

count-of-smaller-numbers-after-self

['Array', 'Binary Search', 'Divide and Conquer', 'Binary Indexed Tree', 'Segment Tree', 'Merge Sort', 'Ordered Set']

true

false

50.977576

Medium

316

false

Remove Duplicate Letters

remove-duplicate-letters

['String', 'Stack', 'Greedy', 'Monotonic Stack']

true

false

44.144789

Hard

317

false

true

Shortest Distance from All Buildings

shortest-distance-from-all-buildings

['Array', 'Breadth-First Search', 'Matrix']

true

false

60.435039

Medium

318

false

Maximum Product of Word Lengths

maximum-product-of-word-lengths

['Array', 'String', 'Bit Manipulation']

true

false

53.820916

Medium

319

false

Bulb Switcher

bulb-switcher

['Math', 'Brainteaser']

true

false

59.965443

Medium

320

false

true

Generalized Abbreviation

generalized-abbreviation

['String', 'Backtracking', 'Bit Manipulation']

true

false

31.998009

Hard

321

false

Create Maximum Number

create-maximum-number

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

false

46.035762

Medium

322

false

Coin Change

coin-change

['Array', 'Dynamic Programming', 'Breadth-First Search']

true

63.960525

Medium

323

false

true

Number of Connected Components in an Undirected Graph

number-of-connected-components-in-an-undirected-graph

['Depth-First Search', 'Breadth-First Search', 'Union Find', 'Graph']

true

35.423376

Medium

324

false

Wiggle Sort II

wiggle-sort-ii

['Array', 'Divide and Conquer', 'Greedy', 'Sorting', 'Quickselect']

false

50.278305

Medium

325

false

true

Maximum Size Subarray Sum Equals k

maximum-size-subarray-sum-equals-k

['Array', 'Hash Table', 'Prefix Sum']

true

false

47.731025

Easy

326

false

Power of Three

power-of-three

['Math', 'Recursion']

true

false

36.756108

Hard

327

false

Count of Range Sum

count-of-range-sum

['Array', 'Binary Search', 'Divide and Conquer', 'Binary Indexed Tree', 'Segment Tree', 'Merge Sort', 'Ordered Set']

false

61.877863

Medium

328

false

Odd Even Linked List

odd-even-linked-list

['Linked List']

true

false

55.036278

Hard

329

false

Longest Increasing Path in a Matrix

longest-increasing-path-in-a-matrix

['Array', 'Dynamic Programming', 'Depth-First Search', 'Breadth-First Search', 'Graph', 'Topological Sort', 'Memoization', 'Matrix']

true

false

53.392615

Hard

330

false

Patching Array

patching-array

['Array', 'Greedy']

true

false

45.968824

Medium

331

false

Verify Preorder Serialization of a Binary Tree

verify-preorder-serialization-of-a-binary-tree

['String', 'Stack', 'Tree', 'Binary Tree']

true

false

43.454141

Hard

332

false

Reconstruct Itinerary

reconstruct-itinerary

['Depth-First Search', 'Graph', 'Eulerian Circuit']

false

45.206268

Medium

333

false

true

Largest BST Subtree

largest-bst-subtree

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

true

false

39.144039

Medium

334

false

Increasing Triplet Subsequence

increasing-triplet-subsequence

['Array', 'Greedy']

true

false

31.764972

Hard

335

false

Self Crossing

self-crossing

['Array', 'Math', 'Geometry']

false

36.089906

Hard

336

false

Palindrome Pairs

palindrome-pairs

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

true

false

54.774496

Medium

337

false

House Robber III

house-robber-iii

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

true

false

79.496429

Easy

338

false

Counting Bits

counting-bits

['Dynamic Programming', 'Bit Manipulation']

true

false

85.324738

Medium

339

false

true

Nested List Weight Sum

nested-list-weight-sum

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

true

49.384069

Medium

340

false

true

Longest Substring with At Most K Distinct Characters

longest-substring-with-at-most-k-distinct-characters

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

true

65.236997

Medium

341

false

Flatten Nested List Iterator

flatten-nested-list-iterator

['Stack', 'Tree', 'Depth-First Search', 'Design', 'Queue', 'Iterator']

true

false

49.199515

Easy

342

false

Power of Four

power-of-four

['Math', 'Bit Manipulation', 'Recursion']

true

false

60.9892

Medium

343

false

Integer Break

integer-break

['Math', 'Dynamic Programming']

true

false

79.572384

Easy

344

false

Reverse String

reverse-string

['Two Pointers', 'String']

true

57.427146

Easy

345

false

Reverse Vowels of a String

reverse-vowels-of-a-string

['Two Pointers', 'String']

true

79.746989

Easy

346

false

true

Moving Average from Data Stream

moving-average-from-data-stream

['Array', 'Design', 'Queue', 'Data Stream']

true

64.241056

Medium

347

false

Top K Frequent Elements

top-k-frequent-elements

['Array', 'Hash Table', 'Divide and Conquer', 'Sorting', 'Heap (Priority Queue)', 'Bucket Sort', 'Counting', 'Quickselect']

true

58.495608

Medium

348

false

true

Design Tic-Tac-Toe

design-tic-tac-toe

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

true

false

76.157565

Easy

349

false

Intersection of Two Arrays

intersection-of-two-arrays

['Array', 'Hash Table', 'Two Pointers', 'Binary Search', 'Sorting']

true

false

58.937561

Easy

350

false

Intersection of Two Arrays II

intersection-of-two-arrays-ii

['Array', 'Hash Table', 'Two Pointers', 'Binary Search', 'Sorting']

true

false

53.237357

Medium

351

false

true

Android Unlock Patterns

android-unlock-patterns

['Dynamic Programming', 'Backtracking', 'Bit Manipulation', 'Bitmask']

true

false

60.347101

Hard

352

false

Data Stream as Disjoint Intervals

data-stream-as-disjoint-intervals

['Binary Search', 'Design', 'Ordered Set']

true

false

39.069553

Medium

353

false

true

Design Snake Game

design-snake-game

['Array', 'Hash Table', 'Design', 'Queue', 'Simulation']

true

false

37.205784

Hard

354

false

Russian Doll Envelopes

russian-doll-envelopes

['Array', 'Binary Search', 'Dynamic Programming', 'Sorting']

true

false

41.754525

Medium

355

false

Design Twitter

design-twitter

['Hash Table', 'Linked List', 'Design', 'Heap (Priority Queue)']

false

35.898789

Medium

356

false

true

Line Reflection

line-reflection

['Array', 'Hash Table', 'Math']

false

54.071849

Medium

357

false

Count Numbers with Unique Digits

count-numbers-with-unique-digits

['Math', 'Dynamic Programming', 'Backtracking']

false

39.308741

Hard

358

false

true

Rearrange String k Distance Apart

rearrange-string-k-distance-apart

['Hash Table', 'String', 'Greedy', 'Sorting', 'Heap (Priority Queue)', 'Counting']

true

false

76.400692

Easy

359

false

true

Logger Rate Limiter

logger-rate-limiter

['Hash Table', 'Design', 'Data Stream']

true

56.877679

Medium

360

false

true

Sort Transformed Array

sort-transformed-array

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

true

false

52.040077

Medium

361

false

true

Bomb Enemy

bomb-enemy

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

true

false

69.06354

Medium

362

false

true

Design Hit Counter

design-hit-counter

['Array', 'Binary Search', 'Design', 'Queue', 'Data Stream']

true

false

44.543562

Hard

363

false

Max Sum of Rectangle No Larger Than K

max-sum-of-rectangle-no-larger-than-k

['Array', 'Binary Search', 'Matrix', 'Prefix Sum', 'Ordered Set']

true

false

65.223454

Medium

364

false

true

Nested List Weight Sum II

nested-list-weight-sum-ii

['Stack', 'Depth-First Search', 'Breadth-First Search']

true

false

42.689623

Medium

365

false

Water and Jug Problem

water-and-jug-problem

['Math', 'Depth-First Search', 'Breadth-First Search']

false

80.999929

Medium

366

false

true

Find Leaves of Binary Tree

find-leaves-of-binary-tree

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

true

44.087418

Easy

367

false

Valid Perfect Square

valid-perfect-square

['Math', 'Binary Search']

true

false

48.693992

Medium

368

false

Largest Divisible Subset

largest-divisible-subset

['Array', 'Math', 'Dynamic Programming', 'Sorting']

true

false

61.136776

Medium

369

false

true

Plus One Linked List

plus-one-linked-list

['Linked List', 'Math']

true

72.187313

Medium

370

false

true

Range Addition

range-addition

['Array', 'Prefix Sum']

true

false

53.348406

Medium

371

false

Sum of Two Integers

sum-of-two-integers

['Math', 'Bit Manipulation']

true

false

35.328438

Medium

372

false

Super Pow

super-pow

['Math', 'Divide and Conquer']

false

40.51175

Medium

373

false

Find K Pairs with Smallest Sums

find-k-pairs-with-smallest-sums

['Array', 'Heap (Priority Queue)']

true

false

55.404669

Easy

374

false

Guess Number Higher or Lower

guess-number-higher-or-lower

['Binary Search', 'Interactive']

true

50.823353

Medium

375

false

Guess Number Higher or Lower II

guess-number-higher-or-lower-ii

['Math', 'Dynamic Programming', 'Game Theory']

true

false

48.782082

Medium

376

false

Wiggle Subsequence

wiggle-subsequence

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

true

false

54.57406

Medium

377

false

Combination Sum IV

combination-sum-iv

['Array', 'Dynamic Programming']

true

false

63.345915

Medium

378

false

Kth Smallest Element in a Sorted Matrix

kth-smallest-element-in-a-sorted-matrix

['Array', 'Binary Search', 'Sorting', 'Heap (Priority Queue)', 'Matrix']

true

false

52.254822

Medium

379

false

true

Design Phone Directory

design-phone-directory

['Array', 'Hash Table', 'Linked List', 'Design', 'Queue']

true

false

54.966186

Medium

380

false

Insert Delete GetRandom O(1)

insert-delete-getrandom-o1

['Array', 'Hash Table', 'Math', 'Design', 'Randomized']

true

false

35.843903

Hard

381

false

Insert Delete GetRandom O(1) - Duplicates allowed

insert-delete-getrandom-o1-duplicates-allowed

['Array', 'Hash Table', 'Math', 'Design', 'Randomized']

true

false

63.833205

Medium

382

false

Linked List Random Node

linked-list-random-node

['Linked List', 'Math', 'Reservoir Sampling', 'Randomized']

true

false

64.130115

Easy

383

false

Ransom Note

ransom-note

['Hash Table', 'String', 'Counting']

true

58.896139

Medium

384

false

Shuffle an Array

shuffle-an-array

['Array', 'Math', 'Design', 'Randomized']

true

false

39.794067

Medium

385

false

Mini Parser

mini-parser

['String', 'Stack', 'Depth-First Search']

false

73.036935

Medium

386

false

Lexicographical Numbers

lexicographical-numbers

['Depth-First Search', 'Trie']

true

false

63.380828

Easy

387

false

First Unique Character in a String

first-unique-character-in-a-string

['Hash Table', 'String', 'Queue', 'Counting']

true

48.209865

Medium

388

false

Longest Absolute File Path

longest-absolute-file-path

['String', 'Stack', 'Depth-First Search']

false

59.63395

Easy

389

false

Find the Difference

find-the-difference

['Hash Table', 'String', 'Bit Manipulation', 'Sorting']

true

false

44.662015

Medium

390

false

Elimination Game

elimination-game

['Math', 'Recursion']

false

34.909262

Hard

391

false

Perfect Rectangle

perfect-rectangle

['Array', 'Line Sweep']

false

48.273048

Easy

392

false

Is Subsequence

is-subsequence

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

true

false

45.451955

Medium

393

false

UTF-8 Validation

utf-8-validation

['Array', 'Bit Manipulation']

true

false

60.832597

Medium

394

false

Decode String

decode-string

['String', 'Stack', 'Recursion']

true

false

45.345917

Medium

395

false

Longest Substring with At Least K Repeating Characters

longest-substring-with-at-least-k-repeating-characters

['Hash Table', 'String', 'Divide and Conquer', 'Sliding Window']

true

false

43.729394

Medium

396

false

Rotate Function

rotate-function

['Array', 'Math', 'Dynamic Programming']

false

36.373182

Medium

397

false

Integer Replacement

integer-replacement

['Dynamic Programming', 'Greedy', 'Bit Manipulation', 'Memoization']

false

64.374519

Medium

398

false

Random Pick Index

random-pick-index

['Hash Table', 'Math', 'Reservoir Sampling', 'Randomized']

true

false

62.880355

Medium

399

false

Evaluate Division

evaluate-division

['Array', 'String', 'Depth-First Search', 'Breadth-First Search', 'Union Find', 'Graph', 'Shortest Path']

true

false

35.445441

Medium

400

false

Nth Digit

nth-digit

['Math', 'Binary Search']

false