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Problems

4,005 problems

Has videoPremium onlyReset
Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 4,005 results

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TitleSolutionAcceptDifficultyTopics
301. Remove Invalid ParenthesesVideo
Solution52.4%Hard
Backtracking, Breadth-First Search +1· 10 companies
302. Smallest Rectangle Enclosing Black PixelsVideoPremium
Solution60.9%Hard
Array, Binary Search +3· 1 company
303. Range Sum Query - ImmutableVideo
Solution73.5%Easy
Array, Design +1· 8 companies
304. Range Sum Query 2D - ImmutableVideo
Solution59.2%Medium
Array, Design +2· 10 companies
305. Number of Islands IIVideoPremium
Solution40.5%Hard
Array, Hash Table +1· 10 companies
306. Additive NumberVideo
Solution34.2%Medium
Backtracking, String· 3 companies
307. Range Sum Query - MutableVideo
Solution43.9%Medium
Array, Binary Indexed Tree +2· 4 companies
308. Range Sum Query 2D - MutableVideoPremium
Solution46.0%Medium
Array, Binary Indexed Tree +3· 3 companies
309. Best Time to Buy and Sell Stock with CooldownVideo
Solution62.4%Medium
Array, Dynamic Programming· 8 companies
310. Minimum Height TreesVideo
Solution42.4%Medium
Breadth-First Search, Depth-First Search +2· 7 companies
311. Sparse Matrix MultiplicationVideoPremium
Solution69.3%Medium
Array, Hash Table +1· 9 companies
312. Burst BalloonsVideo
Solution64.3%Hard
Array, Dynamic Programming· 15 companies
313. Super Ugly NumberVideo
Solution46.6%Medium
Array, Dynamic Programming +1· 5 companies
314. Binary Tree Vertical Order TraversalVideoPremium
Solution57.8%Medium
Binary Tree, Breadth-First Search +4· 9 companies
315. Count of Smaller Numbers After SelfVideo
Solution44.0%Hard
Array, Binary Indexed Tree +5· 6 companies
316. Remove Duplicate LettersVideo
Solution54.7%Medium
Greedy, Monotonic Stack +2· 13 companies
317. Shortest Distance from All BuildingsVideoPremium
Solution44.9%Hard
Array, Breadth-First Search +1· 15 companies
318. Maximum Product of Word LengthsVideo
Solution61.7%Medium
Array, Bit Manipulation +1· 2 companies
319. Bulb SwitcherVideo
Solution56.2%Medium
Brainteaser, Math· 9 companies
320. Generalized AbbreviationVideoPremium
Solution61.0%Medium
Backtracking, Bit Manipulation +1· 1 company
321. Create Maximum NumberVideo
Solution37.3%Hard
Array, Greedy +3· 7 companies
322. Coin ChangeVideo
Solution49.3%Medium
Array, Breadth-First Search +1· 40 companies
323. Number of Connected Components in an Undirected GraphVideoPremium
Solution64.9%Medium
Breadth-First Search, Depth-First Search +2· 7 companies
324. Wiggle Sort IIVideo
Solution38.4%Medium
Array, Divide and Conquer +3· 4 companies
325. Maximum Size Subarray Sum Equals kVideoPremium
Solution50.8%Medium
Array, Hash Table +1· 8 companies
326. Power of ThreeVideo
Solution51.4%Easy
Math, Recursion· 6 companies
327. Count of Range SumVideo
Solution40.3%Hard
Array, Binary Indexed Tree +5· 5 companies
328. Odd Even Linked ListVideo
Solution62.4%Medium
Linked List· 12 companies
329. Longest Increasing Path in a MatrixVideo
Solution57.0%Hard
Array, Breadth-First Search +6· 16 companies
330. Patching ArrayVideo
Solution54.7%Hard
Array, Greedy· 4 companies
331. Verify Preorder Serialization of a Binary TreeVideo
Solution47.8%Medium
Binary Tree, Stack +2· 1 company
332. Reconstruct ItineraryVideo
Solution45.0%Hard
Depth-First Search, Eulerian Circuit +1· 23 companies
333. Largest BST SubtreeVideoPremium
Solution45.8%Medium
Binary Search Tree, Binary Tree +3· 2 companies
334. Increasing Triplet SubsequenceVideo
Solution39.3%Medium
Array, Greedy· 7 companies
335. Self CrossingVideo
Solution36.9%Hard
Array, Geometry +1· 1 company
336. Palindrome PairsVideo
Solution37.7%Hard
Array, Hash Table +2· 8 companies
337. House Robber IIIVideo
Solution56.3%Medium
Binary Tree, Depth-First Search +2· 13 companies
338. Counting BitsVideo
Solution80.5%Easy
Bit Manipulation, Dynamic Programming· 9 companies
339. Nested List Weight SumVideoPremium
Solution85.9%Medium
Breadth-First Search, Depth-First Search· 6 companies
340. Longest Substring with At Most K Distinct CharactersVideoPremium
Solution49.9%Medium
Hash Table, Sliding Window +1· 12 companies
341. Flatten Nested List IteratorVideo
Solution65.6%Medium
Depth-First Search, Design +4· 19 companies
342. Power of FourVideo
Solution52.5%Easy
Bit Manipulation, Math +1· 8 companies
343. Integer BreakVideo
Solution62.6%Medium
Dynamic Programming, Math· 6 companies
344. Reverse StringVideo
Solution81.2%Easy
String, Two Pointers· 16 companies
345. Reverse Vowels of a StringVideo
Solution62.1%Easy
String, Two Pointers· 13 companies
346. Moving Average from Data StreamVideoPremium
Solution80.2%Easy
Array, Data Stream +2· 11 companies
347. Top K Frequent ElementsVideo
Solution67.3%Medium
Array, Bucket Sort +6· 53 companies
348. Design Tic-Tac-ToeVideoPremium
Solution58.8%Medium
Array, Design +3· 13 companies
349. Intersection of Two ArraysVideo
Solution78.2%Easy
Array, Binary Search +3· 16 companies
350. Intersection of Two Arrays IIVideo
Solution60.4%Easy
Array, Binary Search +3· 9 companies
Showing 301–350 of 4,005