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Problems

877 problems

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

877 results

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TitleSolutionAcceptDifficultyTopics
411. Minimum Unique Word AbbreviationVideoPremium
–40.5%Hard
Array, Backtracking +2· 2 companies
412. Fizz BuzzVideo
Solution75.9%Easy
Math, Simulation +1· 18 companies
415. Add StringsVideo
Solution52.1%Easy
Math, Simulation +1· 14 companies
418. Sentence Screen FittingVideoPremium
Solution36.3%Medium
Array, Dynamic Programming +1· 1 company
420. Strong Password CheckerVideo
Solution16.7%Hard
Greedy, Heap (Priority Queue) +1· 7 companies
423. Reconstruct Original Digits from EnglishVideo
Solution53.4%Medium
Hash Table, Math +1· 4 companies
424. Longest Repeating Character ReplacementVideo
Solution60.4%Medium
Hash Table, Sliding Window +1· 22 companies
425. Word SquaresVideoPremium
Solution54.7%Hard
Array, Backtracking +2· 1 company
428. Serialize and Deserialize N-ary TreeVideoPremium
Solution68.7%Hard
Breadth-First Search, Depth-First Search +2· 7 companies
433. Minimum Genetic MutationVideo
Solution57.1%Medium
Breadth-First Search, Hash Table +1· 6 companies
434. Number of Segments in a StringVideo
Solution37.6%Easy
String· 3 companies
438. Find All Anagrams in a StringVideo
Solution54.7%Medium
Hash Table, Sliding Window +1· 15 companies
439. Ternary Expression ParserVideoPremium
Solution62.6%Medium
Recursion, Stack +1· 1 company
443. String CompressionVideo
Solution60.9%Medium
String, Two Pointers· 41 companies
449. Serialize and Deserialize BSTVideo
Solution60.1%Medium
Binary Search Tree, Binary Tree +5· 4 companies
451. Sort Characters By FrequencyVideo
Solution75.8%Medium
Bucket Sort, Counting +4· 16 companies
459. Repeated Substring PatternVideo
Solution48.6%Easy
String, String Matching· 9 companies
466. Count The RepetitionsVideo
Solution36.0%Hard
Dynamic Programming, String· 1 company
467. Unique Substrings in Wraparound StringVideo
Solution44.0%Medium
Dynamic Programming, String· 2 companies
468. Validate IP AddressVideo
Solution28.2%Medium
String· 12 companies
471. Encode String with Shortest LengthVideoPremium
Solution50.5%Hard
Dynamic Programming, String· 1 company
472. Concatenated WordsVideo
Solution49.9%Hard
Array, Depth-First Search +3· 3 companies
474. Ones and ZeroesVideo
Solution53.7%Medium
Array, Dynamic Programming +1· 5 companies
481. Magical StringVideo
Solution56.6%Medium
String, Two Pointers· 3 companies
482. License Key FormattingVideo
Solution46.4%Easy
String· 1 company
484. Find PermutationVideoPremium
Solution67.0%Medium
Array, Greedy +2· 1 company
488. Zuma GameVideo
Solution29.4%Hard
Breadth-First Search, Dynamic Programming +3· 7 companies
499. The Maze IIIVideoPremium
Solution52.3%Hard
Array, Breadth-First Search +6· 1 company
500. Keyboard RowVideo
Solution74.3%Easy
Array, Hash Table +1· 4 companies
514. Freedom TrailVideo
Solution59.4%Hard
Breadth-First Search, Depth-First Search +2· 3 companies
516. Longest Palindromic SubsequenceVideo
Solution65.8%Medium
Dynamic Programming, String· 15 companies
520. Detect CapitalVideo
Solution56.8%Easy
String· 4 companies
521. Longest Uncommon Subsequence IVideo
Solution62.7%Easy
String· 2 companies
522. Longest Uncommon Subsequence IIVideo
Solution45.8%Medium
Array, Hash Table +3· 1 company
524. Longest Word in Dictionary through DeletingVideo
Solution53.2%Medium
Array, Sorting +2· 2 companies
527. Word AbbreviationVideoPremium
Solution62.7%Hard
Array, Greedy +3· 4 companies
535. Encode and Decode TinyURLVideo
Solution86.5%Medium
Design, Hash Function +2· 9 companies
536. Construct Binary Tree from StringVideoPremium
Solution58.7%Medium
Binary Tree, Depth-First Search +3· 3 companies
537. Complex Number MultiplicationVideo
Solution73.9%Medium
Math, Simulation +1· 3 companies
539. Minimum Time DifferenceVideo
Solution62.7%Medium
Array, Math +2· 9 companies
541. Reverse String IIVideo
Solution54.7%Easy
String, Two Pointers· 7 companies
544. Output Contest MatchesVideoPremium
Solution77.3%Medium
Recursion, Simulation +1· 1 company
551. Student Attendance Record IVideo
Solution50.1%Easy
String· 3 companies
555. Split Concatenated StringsVideoPremium
Solution43.4%Medium
Array, Greedy +1· 1 company
556. Next Greater Element IIIVideo
Solution35.2%Medium
Math, String +1· 11 companies
557. Reverse Words in a String IIIVideo
Solution84.0%Easy
String, Two Pointers· 7 companies
564. Find the Closest PalindromeVideo
Solution32.2%Hard
Math, String· 8 companies
567. Permutation in StringVideo
Solution49.8%Medium
Hash Table, Sliding Window +2· 16 companies
583. Delete Operation for Two StringsVideo
Solution66.0%Medium
Dynamic Programming, String· 4 companies
588. Design In-Memory File SystemVideoPremium
Solution48.0%Hard
Design, Hash Table +3· 16 companies
Showing 101–150 of 877