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Problems

870 problems

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

With video · 870 results

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TitleSolutionAcceptDifficultyTopics
981. Time Based Key-Value StoreVideo
Solution49.8%Medium
Binary Search, Design +2· 34 companies
984. String Without AAA or BBBVideo
Solution45.6%Medium
Greedy, String· 3 companies
988. Smallest String Starting From LeafVideo
Solution61.2%Medium
Backtracking, Binary Tree +3· 2 companies
990. Satisfiability of Equality EquationsVideo
Solution52.2%Medium
Array, Graph +2· 6 companies
1002. Find Common CharactersVideo
Solution74.6%Easy
Array, Hash Table +1· 6 companies
1003. Check If Word Is Valid After SubstitutionsVideo
Solution61.1%Medium
Stack, String· 1 company
1016. Binary String With Substrings Representing 1 To NVideo
Solution58.5%Medium
String· 2 companies
1021. Remove Outermost ParenthesesVideo
Solution88.3%Easy
Stack, String· 6 companies
1023. Camelcase MatchingVideo
Solution65.8%Medium
Array, String +3· 2 companies
1028. Recover a Tree From Preorder TraversalVideo
Solution83.2%Hard
Binary Tree, Depth-First Search +2· 6 companies
1032. Stream of CharactersVideo
Solution52.8%Hard
Array, Data Stream +3· 4 companies
1041. Robot Bounded In CircleVideo
Solution56.6%Medium
Math, Simulation +1· 11 companies
1044. Longest Duplicate SubstringVideo
Solution31.1%Hard
Binary Search, Hash Function +4· 7 companies
1047. Remove All Adjacent Duplicates In StringVideo
Solution74.2%Easy
Stack, String· 15 companies
1048. Longest String ChainVideo
Solution63.5%Medium
Array, Dynamic Programming +4· 16 companies
1055. Shortest Way to Form StringVideoPremium
Solution61.6%Medium
Binary Search, Greedy +2· 3 companies
1058. Minimize Rounding Error to Meet TargetVideoPremium
Solution45.9%Medium
Array, Greedy +3· 1 company
1061. Lexicographically Smallest Equivalent StringVideo
Solution81.1%Medium
String, Union Find· 5 companies
1062. Longest Repeating SubstringVideoPremium
Solution63.4%Medium
Binary Search, Dynamic Programming +4· 4 companies
1065. Index Pairs of a StringVideoPremium
Solution68.6%Easy
Array, Sorting +2· 1 company
1071. Greatest Common Divisor of StringsVideo
Solution54.1%Easy
Math, String· 7 companies
1078. Occurrences After BigramVideo
Solution64.1%Easy
String· 1 company
1079. Letter Tile PossibilitiesVideo
Solution83.5%Medium
Backtracking, Counting +2· 5 companies
1081. Smallest Subsequence of Distinct CharactersVideo
Solution70.6%Medium
Greedy, Monotonic Stack +2· 5 companies
1087. Brace ExpansionVideoPremium
Solution66.5%Medium
Backtracking, Breadth-First Search +1· 6 companies
1092. Shortest Common Supersequence Video
Solution62.4%Hard
Dynamic Programming, String· 5 companies
1096. Brace Expansion IIVideo
Solution79.2%Hard
Backtracking, Breadth-First Search +2· 1 company
1100. Find K-Length Substrings With No Repeated CharactersVideoPremium
Solution76.5%Medium
Hash Table, Sliding Window +1· 1 company
1106. Parsing A Boolean ExpressionVideo
Solution69.8%Hard
Recursion, Stack +1· 8 companies
1108. Defanging an IP AddressVideo
Solution90.0%Easy
String· 7 companies
1111. Maximum Nesting Depth of Two Valid Parentheses StringsVideo
Solution82.9%Medium
Stack, String· 3 companies
1119. Remove Vowels from a StringVideoPremium
Solution91.2%Easy
String· 1 company
1138. Alphabet Board PathVideo
Solution52.1%Medium
Hash Table, String· 1 company
1143. Longest Common SubsequenceVideo
Solution59.6%Medium
Dynamic Programming, String· 19 companies
1147. Longest Chunked Palindrome DecompositionVideo
Solution58.6%Hard
Dynamic Programming, Greedy +4· 1 company
1153. String Transforms Into Another StringVideoPremium
Solution34.9%Hard
Hash Table, String· 1 company
1154. Day of the YearVideo
Solution50.3%Easy
Math, String· 3 companies
1156. Swap For Longest Repeated Character SubstringVideo
Solution44.9%Medium
Hash Table, Sliding Window +1· 2 companies
1160. Find Words That Can Be Formed by CharactersVideo
Solution71.5%Easy
Array, Counting +2· 7 companies
1163. Last Substring in Lexicographical OrderVideo
Solution35.1%Hard
String, Two Pointers· 5 companies
1165. Single-Row KeyboardVideoPremium
Solution87.6%Easy
Hash Table, String· 1 company
1166. Design File SystemVideoPremium
Solution65.1%Medium
Design, Hash Table +2· 12 companies
1169. Invalid TransactionsVideo
Solution32.7%Medium
Array, Hash Table +2· 7 companies
1170. Compare Strings by Frequency of the Smallest CharacterVideo
Solution63.3%Medium
Array, Binary Search +3· 1 company
1177. Can Make Palindrome from SubstringVideo
Solution42.0%Medium
Array, Bit Manipulation +3· 1 company
1178. Number of Valid Words for Each PuzzleVideo
Solution47.8%Hard
Array, Bit Manipulation +3· 1 company
1180. Count Substrings with Only One Distinct LetterVideoPremium
Solution80.9%Easy
Math, String· 1 company
1181. Before and After PuzzleVideoPremium
Solution51.8%Medium
Array, Hash Table +2· 1 company
1189. Maximum Number of BalloonsVideo
Solution64.1%Easy
Counting, Hash Table +1· 6 companies
1190. Reverse Substrings Between Each Pair of ParenthesesVideo
Solution75.2%Medium
Stack, String· 7 companies
Showing 251–300 of 870