2.02 String

String #

No.TitleSolutionDifficultyTimeComplexitySpaceComplexityFavoriteAcceptance
0003Longest Substring Without Repeating CharactersGoMediumO(n)O(1)❤️33.6%
0005Longest Palindromic SubstringGoMedium32.3%
0006Zigzag ConversionGoMedium42.6%
0008String to Integer (atoi)GoMedium16.6%
0012Integer to RomanGoMedium60.2%
0013Roman to IntegerGoEasy58.3%
0014Longest Common PrefixGoEasy40.4%
0017Letter Combinations of a Phone NumberGoMediumO(log n)O(1)55.1%
0020Valid ParenthesesGoEasyO(log n)O(1)40.8%
0022Generate ParenthesesGoMediumO(log n)O(1)71.3%
0028Implement strStr()GoEasyO(n)O(1)37.1%
0030Substring with Concatenation of All WordsGoHardO(n)O(n)❤️30.7%
0032Longest Valid ParenthesesGoHard32.5%
0043Multiply StringsGoMedium38.5%
0049Group AnagramsGoMediumO(n log n)O(n)65.4%
0058Length of Last WordGoEasy39.4%
0065Valid NumberGoHard18.5%
0067Add BinaryGoEasy51.0%
0071Simplify PathGoMediumO(n)O(n)39.1%
0076Minimum Window SubstringGoHardO(n)O(n)❤️39.7%
0091Decode WaysGoMediumO(n)O(n)31.1%
0093Restore IP AddressesGoMediumO(n)O(n)❤️42.9%
0097Interleaving StringGoMedium36.9%
0115Distinct SubsequencesGoHard43.2%
0125Valid PalindromeGoEasyO(n)O(1)43.0%
0126Word Ladder IIGoHardO(n)O(n^2)❤️27.6%
0127Word LadderGoHard36.3%
0131Palindrome PartitioningGoMedium61.6%
0151Reverse Words in a StringGoMedium29.7%
0168Excel Sheet Column TitleGoEasy34.5%
0171Excel Sheet Column NumberGoEasy61.1%
0179Largest NumberGoMedium33.6%
0187Repeated DNA SequencesGoMedium45.8%
0205Isomorphic StringsGoEasy42.4%
0208Implement Trie (Prefix Tree)GoMedium60.1%
0211Design Add and Search Words Data StructureGoMedium43.7%
0212Word Search IIGoHard37.2%
0224Basic CalculatorGoHard40.9%
0227Basic Calculator IIGoMedium42.0%
0242Valid AnagramGoEasy62.5%
0257Binary Tree PathsGoEasy60.0%
0290Word PatternGoEasy40.3%
0297Serialize and Deserialize Binary TreeGoHard54.6%
0299Bulls and CowsGoMedium48.2%
0301Remove Invalid ParenthesesGoHard47.0%
0306Additive NumberGoMedium30.8%
0318Maximum Product of Word LengthsGoMedium60.2%
0331Verify Preorder Serialization of a Binary TreeGoMedium44.0%
0344Reverse StringGoEasyO(n)O(1)75.8%
0345Reverse Vowels of a StringGoEasyO(n)O(1)47.4%
0383Ransom NoteGoEasy57.7%
0385Mini ParserGoMedium36.3%
0387First Unique Character in a StringGoEasy58.6%
0389Find the DifferenceGoEasy60.5%
0392Is SubsequenceGoEasy49.9%
0394Decode StringGoMedium57.1%
0395Longest Substring with At Least K Repeating CharactersGoMedium44.8%
0402Remove K DigitsGoMedium30.5%
0409Longest PalindromeGoEasy54.4%
0412Fizz BuzzGoEasy68.0%
0423Reconstruct Original Digits from EnglishGoMedium51.3%
0424Longest Repeating Character ReplacementGoMedium51.2%
0433Minimum Genetic MutationGoMedium47.8%
0434Number of Segments in a StringGoEasy37.8%
0438Find All Anagrams in a StringGoMedium48.8%
0451Sort Characters By FrequencyGoMedium68.3%
0474Ones and ZeroesGoMedium46.7%
0488Zuma GameGoHard35.3%
0500Keyboard RowGoEasy68.7%
0520Detect CapitalGoEasy55.7%
0524Longest Word in Dictionary through DeletingGoMedium51.1%
0535Encode and Decode TinyURLGoMedium85.7%
0537Complex Number MultiplicationGoMedium71.3%
0541Reverse String IIGoEasy50.3%
0551Student Attendance Record IGoEasy47.9%
0557Reverse Words in a String IIIGoEasy79.9%
0567Permutation in StringGoMedium44.0%
0583Delete Operation for Two StringsGoMedium58.9%
0599Minimum Index Sum of Two ListsGoEasy52.5%
0609Find Duplicate File in SystemGoMedium64.0%
0647Palindromic SubstringsGoMedium66.1%
0648Replace WordsGoMedium62.5%
0676Implement Magic DictionaryGoMedium56.8%
0677Map Sum PairsGoMedium57.0%
0692Top K Frequent WordsGoMedium55.0%
0696Count Binary SubstringsGoEasy65.3%
0709To Lower CaseGoEasy81.7%
0720Longest Word in DictionaryGoMedium51.6%
0721Accounts MergeGoMedium56.2%
0726Number of AtomsGoHard52.1%
0745Prefix and Suffix SearchGoHard41.4%
0748Shortest Completing WordGoEasy59.1%
0752Open the LockGoMedium55.5%
0763Partition LabelsGoMedium79.8%
0767Reorganize StringGoMediumO(n log n)O(log n)❤️52.6%
0771Jewels and StonesGoEasy87.9%
0784Letter Case PermutationGoMedium73.2%
0791Custom Sort StringGoMedium69.4%
0792Number of Matching SubsequencesGoMedium52.0%
0794Valid Tic-Tac-Toe StateGoMedium35.2%
0811Subdomain Visit CountGoMedium74.8%
0816Ambiguous CoordinatesGoMedium56.0%
0819Most Common WordGoEasy45.1%
0820Short Encoding of WordsGoMedium60.7%
0821Shortest Distance to a CharacterGoEasy71.2%
0828Count Unique Characters of All Substrings of a Given StringGoHard50.9%
0830Positions of Large GroupsGoEasy51.6%
0838Push DominoesGoMedium52.6%
0839Similar String GroupsGoHard47.0%
0842Split Array into Fibonacci SequenceGoMediumO(n^2)O(1)❤️38.1%
0844Backspace String CompareGoEasy48.0%
0856Score of ParenthesesGoMediumO(n)O(n)65.2%
0859Buddy StringsGoEasy28.9%
0880Decoded String at IndexGoMedium28.3%
0884Uncommon Words from Two SentencesGoEasy65.8%
0890Find and Replace PatternGoMedium78.0%
0916Word SubsetsGoMedium54.3%
0921Minimum Add to Make Parentheses ValidGoMedium76.6%
0925Long Pressed NameGoEasyO(n)O(1)34.1%
0942DI String MatchGoEasy76.4%
0949Largest Time for Given DigitsGoMedium35.3%
0953Verifying an Alien DictionaryGoEasy52.6%
0966Vowel SpellcheckerGoMedium51.5%
0981Time Based Key-Value StoreGoMedium52.3%
0984String Without AAA or BBBGoMedium42.9%
0990Satisfiability of Equality EquationsGoMedium50.6%
1002Find Common CharactersGoEasy68.3%
1003Check If Word Is Valid After SubstitutionsGoMediumO(n)O(1)58.1%
1021Remove Outermost ParenthesesGoEasy80.0%
1028Recover a Tree From Preorder TraversalGoHard72.7%
1047Remove All Adjacent Duplicates In StringGoEasy70.7%
1048Longest String ChainGoMedium59.2%
1078Occurrences After BigramGoEasy64.0%
1079Letter Tile PossibilitiesGoMedium76.1%
1108Defanging an IP AddressGoEasy89.3%
1111Maximum Nesting Depth of Two Valid Parentheses StringsGoMedium73.2%
1143Longest Common SubsequenceGoMedium58.9%
1154Day of the YearGoEasy50.6%
1160Find Words That Can Be Formed by CharactersGoEasy67.8%
1170Compare Strings by Frequency of the Smallest CharacterGoMedium61.2%
1178Number of Valid Words for Each PuzzleGoHard46.6%
1189Maximum Number of BalloonsGoEasy62.3%
1190Reverse Substrings Between Each Pair of ParenthesesGoMedium65.9%
1202Smallest String With SwapsGoMedium57.4%
1208Get Equal Substrings Within BudgetGoMedium47.2%
1209Remove All Adjacent Duplicates in String IIGoMedium56.0%
1221Split a String in Balanced StringsGoEasy84.6%
1234Replace the Substring for Balanced StringGoMedium36.7%
1239Maximum Length of a Concatenated String with Unique CharactersGoMedium50.6%
1249Minimum Remove to Make Valid ParenthesesGoMedium65.6%
1268Search Suggestions SystemGoMedium66.8%
1332Remove Palindromic SubsequencesGoEasy76.0%
1396Design Underground SystemGoMedium73.6%
1446Consecutive CharactersGoEasy61.8%
1455Check If a Word Occurs As a Prefix of Any Word in a SentenceGoEasy64.3%
1461Check If a String Contains All Binary Codes of Size KGoMedium56.8%
1573Number of Ways to Split a StringGoMedium32.4%
1576Replace All ?’s to Avoid Consecutive Repeating CharactersGoEasy49.3%
1614Maximum Nesting Depth of the ParenthesesGoEasy82.6%
1624Largest Substring Between Two Equal CharactersGoEasy59.1%
1629Slowest KeyGoEasy59.5%
1647Minimum Deletions to Make Character Frequencies UniqueGoMedium59.3%
1653Minimum Deletions to Make String BalancedGoMedium58.2%
1657Determine if Two Strings Are CloseGoMedium54.3%
1662Check If Two String Arrays are EquivalentGoEasy81.8%
1663Smallest String With A Given Numeric ValueGoMedium67.1%
1668Maximum Repeating SubstringGoEasy39.6%
1678Goal Parser InterpretationGoEasy86.0%
1684Count the Number of Consistent StringsGoEasy81.9%
1689Partitioning Into Minimum Number Of Deci-Binary NumbersGoMedium89.9%
1694Reformat Phone NumberGoEasy64.8%
1704Determine if String Halves Are AlikeGoEasy77.6%
1736Latest Time by Replacing Hidden DigitsGoEasy42.1%
1758Minimum Changes To Make Alternating Binary StringGoEasy58.6%
1763Longest Nice SubstringGoEasy61.8%
1816Truncate SentenceGoEasy81.7%
2038Remove Colored Pieces if Both Neighbors are the Same ColorGoMedium57.7%
2096Step-By-Step Directions From a Binary Tree Node to AnotherGoMedium48.9%
2167Minimum Time to Remove All Cars Containing Illegal GoodsGoHard39.8%
2182Construct String With Repeat LimitGoMedium51.6%
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