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283 problems

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Array2,209 String870 Hash Table786 Math682 Dynamic Programming666 Sorting504 Greedy480 Binary Search352 Depth-First Search335 Database303 Bit Manipulation283 Matrix278 Tree261 Breadth-First Search255 Two Pointers249 All topics

With video · 283 results

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TitleSolutionAcceptDifficultyTopics

29. Divide Two IntegersVideo

Solution20.1%Medium

Bit Manipulation, Math· 8 companies

67. Add BinaryVideo

Solution58.4%Easy

Bit Manipulation, Math +2· 17 companies

78. SubsetsVideo

Solution82.7%Medium

Array, Backtracking +1· 21 companies

89. Gray CodeVideo

Solution66.2%Medium

Backtracking, Bit Manipulation +1· 5 companies

90. Subsets IIVideo

Solution61.7%Medium

Array, Backtracking +1· 9 companies

136. Single NumberVideo

Solution78.1%Easy

Array, Bit Manipulation· 15 companies

137. Single Number IIVideo

Solution68.0%Medium

Array, Bit Manipulation· 5 companies

187. Repeated DNA SequencesVideo

Solution53.7%Medium

Bit Manipulation, Hash Function +4· 7 companies

190. Reverse BitsVideo

Solution69.2%Easy

Bit Manipulation, Divide and Conquer· 9 companies

191. Number of 1 BitsVideo

Solution77.7%Easy

Bit Manipulation, Divide and Conquer· 11 companies

201. Bitwise AND of Numbers RangeVideo

Solution49.4%Medium

Bit Manipulation· 5 companies

222. Count Complete Tree NodesVideo

Solution72.6%Medium

Binary Search, Binary Tree +2· 7 companies

231. Power of TwoVideo

Solution50.5%Easy

Bit Manipulation, Math +1· 11 companies

260. Single Number IIIVideo

Solution70.2%Medium

Array, Bit Manipulation· 7 companies

266. Palindrome PermutationVideoPremium

Solution68.6%Easy

Bit Manipulation, Hash Table +1· 5 companies

268. Missing NumberVideo

Solution72.4%Easy

Array, Binary Search +4· 19 companies

287. Find the Duplicate NumberVideo

Solution64.7%Medium

Array, Binary Search +2· 22 companies

318. Maximum Product of Word LengthsVideo

Solution61.7%Medium

Array, Bit Manipulation +1· 2 companies

320. Generalized AbbreviationVideoPremium

Solution61.0%Medium

Backtracking, Bit Manipulation +1· 1 company

338. Counting BitsVideo

Solution80.5%Easy

Bit Manipulation, Dynamic Programming· 9 companies

342. Power of FourVideo

Solution52.5%Easy

Bit Manipulation, Math +1· 8 companies

351. Android Unlock PatternsVideoPremium

Solution53.8%Medium

Backtracking, Bit Manipulation +2· 1 company

371. Sum of Two IntegersVideo

Solution55.9%Medium

Bit Manipulation, Math· 8 companies

389. Find the DifferenceVideo

Solution60.8%Easy

Bit Manipulation, Hash Table +2· 6 companies

393. UTF-8 ValidationVideo

Solution46.7%Medium

Array, Bit Manipulation· 4 companies

397. Integer ReplacementVideo

Solution37.9%Medium

Bit Manipulation, Dynamic Programming +2· 4 companies

401. Binary WatchVideo

Solution65.9%Easy

Backtracking, Bit Manipulation· 5 companies

405. Convert a Number to HexadecimalVideo

Solution54.8%Easy

Bit Manipulation, Math· 6 companies

411. Minimum Unique Word AbbreviationVideoPremium

–40.5%Hard

Array, Backtracking +2· 2 companies

421. Maximum XOR of Two Numbers in an ArrayVideo

Solution53.8%Medium

Array, Bit Manipulation +2· 5 companies

461. Hamming DistanceVideo

Solution76.7%Easy

Bit Manipulation· 4 companies

464. Can I WinVideo

Solution31.7%Medium

Bit Manipulation, Bitmask +4· 4 companies

465. Optimal Account BalancingVideoPremium

Solution50.9%Hard

Array, Backtracking +3· 12 companies

473. Matchsticks to SquareVideo

Solution42.3%Medium

Array, Backtracking +3· 9 companies

476. Number ComplementVideo

Solution70.3%Easy

Bit Manipulation· 5 companies

477. Total Hamming DistanceVideo

Solution55.3%Medium

Array, Bit Manipulation +1· 3 companies

491. Non-decreasing SubsequencesVideo

Solution63.1%Medium

Array, Backtracking +2· 3 companies

526. Beautiful ArrangementVideo

Solution64.9%Medium

Array, Backtracking +3· 6 companies

638. Shopping OffersVideo

Solution52.9%Medium

Array, Backtracking +4· 6 companies

645. Set MismatchVideo

Solution43.4%Easy

Array, Bit Manipulation +2· 7 companies

672. Bulb Switcher IIVideo

Solution51.2%Medium

Bit Manipulation, Breadth-First Search +2· 1 company

691. Stickers to Spell WordVideo

Solution51.3%Hard

Array, Backtracking +4· 4 companies

693. Binary Number with Alternating BitsVideo

Solution69.8%Easy

Bit Manipulation· 5 companies

698. Partition to K Equal Sum SubsetsVideo

Solution38.6%Medium

Array, Backtracking +4· 8 companies

751. IP to CIDRVideoPremium

–53.7%Medium

Bit Manipulation, String· 4 companies

756. Pyramid Transition MatrixVideo

Solution60.6%Medium

Bit Manipulation, Breadth-First Search +1· 3 companies

762. Prime Number of Set Bits in Binary RepresentationVideo

Solution78.7%Easy

Bit Manipulation, Math· 2 companies

779. K-th Symbol in GrammarVideo

Solution48.7%Medium

Bit Manipulation, Math +1· 7 companies

782. Transform to ChessboardVideo

Solution51.9%Hard

Array, Bit Manipulation +2· 2 companies

784. Letter Case PermutationVideo

Solution75.7%Medium

Backtracking, Bit Manipulation +1· 7 companies

Showing 1–50 of 283