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Problems

286 problems

Has videoPremium onlyReset
Array2,237String877Hash Table797Math691Dynamic Programming673Sorting508Greedy485Binary Search357Depth-First Search338Database308Bit Manipulation286Matrix279Tree264Breadth-First Search257Prefix Sum252All topics

286 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 286