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703 problems

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Array274Database207String109Hash Table105Depth-First Search75Math70Dynamic Programming69Sorting61Tree60Breadth-First Search51Binary Tree47Greedy47Binary Search46Matrix38Two Pointers37All topics

With video · Premium · 703 results

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TitleSolutionAcceptDifficultyTopics
156. Binary Tree Upside DownVideoPremium
Solution65.4%Medium
Binary Tree, Depth-First Search +1· 2 companies
157. Read N Characters Given Read4VideoPremium
Solution42.5%Easy
Array, Interactive +1· 3 companies
158. Read N Characters Given read4 II - Call Multiple TimesVideoPremium
Solution43.2%Hard
Array, Interactive +1· 5 companies
159. Longest Substring with At Most Two Distinct CharactersVideoPremium
Solution57.0%Medium
Hash Table, Sliding Window +1· 5 companies
161. One Edit DistanceVideoPremium
Solution34.4%Medium
String, Two Pointers· 8 companies
163. Missing RangesVideoPremium
Solution35.5%Easy
Array· 2 companies
170. Two Sum III - Data structure designVideoPremium
Solution39.1%Easy
Array, Data Stream +3· 2 companies
186. Reverse Words in a String IIVideoPremium
Solution56.6%Medium
String, Two Pointers· 4 companies
243. Shortest Word DistanceVideoPremium
Solution66.3%Easy
Array, String· 8 companies
244. Shortest Word Distance IIVideoPremium
Solution62.8%Medium
Array, Design +3· 4 companies
245. Shortest Word Distance IIIVideoPremium
Solution59.4%Medium
Array, String· 2 companies
246. Strobogrammatic NumberVideoPremium
Solution47.6%Easy
Hash Table, String +1· 2 companies
247. Strobogrammatic Number IIVideoPremium
Solution53.5%Medium
Array, Recursion +1· 2 companies
248. Strobogrammatic Number IIIVideoPremium
Solution42.3%Hard
Array, Recursion +1
249. Group Shifted StringsVideoPremium
Solution67.8%Medium
Array, Hash Table +1· 4 companies
250. Count Univalue SubtreesVideoPremium
Solution57.5%Medium
Binary Tree, Depth-First Search +1· 4 companies
251. Flatten 2D VectorVideoPremium
Solution50.5%Medium
Array, Design +2· 4 companies
252. Meeting RoomsVideoPremium
Solution59.4%Easy
Array, Sorting· 10 companies
253. Meeting Rooms IIVideoPremium
Solution52.6%Medium
Array, Greedy +4· 42 companies
254. Factor CombinationsVideoPremium
Solution50.5%Medium
Backtracking· 2 companies
255. Verify Preorder Sequence in Binary Search TreeVideoPremium
Solution51.7%Medium
Array, Binary Search Tree +5· 5 companies
256. Paint HouseVideoPremium
Solution64.3%Medium
Array, Dynamic Programming· 8 companies
259. 3Sum SmallerVideoPremium
Solution51.4%Medium
Array, Binary Search +2· 7 companies
261. Graph Valid TreeVideoPremium
Solution49.9%Medium
Breadth-First Search, Depth-First Search +2· 9 companies
265. Paint House IIVideoPremium
Solution57.0%Hard
Array, Dynamic Programming· 2 companies
266. Palindrome PermutationVideoPremium
Solution68.6%Easy
Bit Manipulation, Hash Table +1· 5 companies
267. Palindrome Permutation IIVideoPremium
Solution41.9%Medium
Backtracking, Hash Table +1
269. Alien DictionaryVideoPremium
Solution37.1%Hard
Array, Breadth-First Search +4· 18 companies
270. Closest Binary Search Tree ValueVideoPremium
Solution49.2%Easy
Binary Search, Binary Search Tree +3· 7 companies
271. Encode and Decode StringsVideoPremium
Solution51.9%Medium
Array, Design +1· 11 companies
272. Closest Binary Search Tree Value IIVideoPremium
Solution61.1%Hard
Binary Search Tree, Binary Tree +5· 3 companies
276. Paint FenceVideoPremium
Solution48.3%Medium
Dynamic Programming· 4 companies
277. Find the CelebrityVideoPremium
Solution48.9%Medium
Graph, Interactive +1· 12 companies
280. Wiggle SortVideoPremium
Solution68.5%Medium
Array, Greedy +1· 4 companies
281. Zigzag IteratorVideoPremium
Solution67.1%Medium
Array, Design +2· 5 companies
285. Inorder Successor in BSTVideoPremium
Solution51.2%Medium
Binary Search Tree, Binary Tree +2· 6 companies
286. Walls and GatesVideoPremium
Solution63.9%Medium
Array, Breadth-First Search +1· 11 companies
288. Unique Word AbbreviationVideoPremium
Solution28.1%Medium
Array, Design +2· 1 company
291. Word Pattern IIVideoPremium
Solution49.1%Medium
Backtracking, Hash Table +1· 6 companies
293. Flip GameVideoPremium
Solution64.8%Easy
String· 1 company
294. Flip Game IIVideoPremium
Solution52.2%Medium
Backtracking, Dynamic Programming +3· 2 companies
296. Best Meeting PointVideoPremium
Solution61.1%Hard
Array, Math +2· 9 companies
298. Binary Tree Longest Consecutive SequenceVideoPremium
Solution54.7%Medium
Binary Tree, Depth-First Search +1· 4 companies
302. Smallest Rectangle Enclosing Black PixelsVideoPremium
Solution60.9%Hard
Array, Binary Search +3· 1 company
305. Number of Islands IIVideoPremium
Solution40.5%Hard
Array, Hash Table +1· 10 companies
308. Range Sum Query 2D - MutableVideoPremium
Solution46.0%Medium
Array, Binary Indexed Tree +3· 3 companies
311. Sparse Matrix MultiplicationVideoPremium
Solution69.3%Medium
Array, Hash Table +1· 9 companies
314. Binary Tree Vertical Order TraversalVideoPremium
Solution57.8%Medium
Binary Tree, Breadth-First Search +4· 9 companies
317. Shortest Distance from All BuildingsVideoPremium
Solution44.9%Hard
Array, Breadth-First Search +1· 15 companies
320. Generalized AbbreviationVideoPremium
Solution61.0%Medium
Backtracking, Bit Manipulation +1· 1 company
Showing 1–50 of 703