2.02 String

String #

No.TitleSolutionDifficultyTimeComplexitySpaceComplexityFavoriteAcceptance
0003Longest Substring Without Repeating CharactersGoMediumO(n)O(1)❤️33.1%
0005Longest Palindromic SubstringGoMedium31.8%
0006Zigzag ConversionGoMedium41.6%
0008String to Integer (atoi)GoMedium16.5%
0012Integer to RomanGoMedium59.4%
0013Roman to IntegerGoEasy57.9%
0014Longest Common PrefixGoEasy39.4%
0017Letter Combinations of a Phone NumberGoMediumO(log n)O(1)53.6%
0020Valid ParenthesesGoEasyO(log n)O(1)40.9%
0022Generate ParenthesesGoMediumO(log n)O(1)70.1%
0028Implement strStr()GoEasyO(n)O(1)35.9%
0030Substring with Concatenation of All WordsGoHardO(n)O(n)❤️28.1%
0032Longest Valid ParenthesesGoHard31.3%
0043Multiply StringsGoMedium37.7%
0049Group AnagramsGoMediumO(n log n)O(n)64.2%
0058Length of Last WordGoEasy37.7%
0065Valid NumberGoHard18.2%
0067Add BinaryGoEasy50.5%
0071Simplify PathGoMediumO(n)O(n)38.8%
0076Minimum Window SubstringGoHardO(n)O(n)❤️39.0%
0091Decode WaysGoMediumO(n)O(n)30.3%
0093Restore IP AddressesGoMediumO(n)O(n)❤️41.9%
0097Interleaving StringGoMedium34.8%
0115Distinct SubsequencesGoHard42.3%
0125Valid PalindromeGoEasyO(n)O(1)41.7%
0126Word Ladder IIGoHardO(n)O(n^2)❤️27.0%
0127Word LadderGoHard35.5%
0131Palindrome PartitioningGoMedium59.5%
0151Reverse Words in a StringGoMedium28.5%
0168Excel Sheet Column TitleGoEasy33.9%
0171Excel Sheet Column NumberGoEasy60.6%
0179Largest NumberGoMedium32.9%
0187Repeated DNA SequencesGoMedium44.7%
0205Isomorphic StringsGoEasy42.1%
0208Implement Trie (Prefix Tree)GoMedium58.2%
0211Design Add and Search Words Data StructureGoMedium44.0%
0212Word Search IIGoHard38.0%
0224Basic CalculatorGoHard40.5%
0227Basic Calculator IIGoMedium41.6%
0242Valid AnagramGoEasy61.4%
0257Binary Tree PathsGoEasy58.7%
0290Word PatternGoEasy40.2%
0297Serialize and Deserialize Binary TreeGoHard53.8%
0299Bulls and CowsGoMedium47.2%
0301Remove Invalid ParenthesesGoHard46.9%
0306Additive NumberGoMedium30.6%
0318Maximum Product of Word LengthsGoMedium56.7%
0331Verify Preorder Serialization of a Binary TreeGoMedium43.7%
0344Reverse StringGoEasyO(n)O(1)74.9%
0345Reverse Vowels of a StringGoEasyO(n)O(1)47.0%
0383Ransom NoteGoEasy55.8%
0385Mini ParserGoMedium35.9%
0387First Unique Character in a StringGoEasy57.1%
0389Find the DifferenceGoEasy60.5%
0392Is SubsequenceGoEasy51.0%
0394Decode StringGoMedium56.3%
0395Longest Substring with At Least K Repeating CharactersGoMedium44.6%
0402Remove K DigitsGoMedium30.5%
0409Longest PalindromeGoEasy53.6%
0412Fizz BuzzGoEasy66.7%
0423Reconstruct Original Digits from EnglishGoMedium51.2%
0424Longest Repeating Character ReplacementGoMedium50.8%
0433Minimum Genetic MutationGoMedium46.8%
0434Number of Segments in a StringGoEasy37.9%
0438Find All Anagrams in a StringGoMedium48.3%
0451Sort Characters By FrequencyGoMedium67.8%
0474Ones and ZeroesGoMedium44.6%
0488Zuma GameGoHard36.1%
0500Keyboard RowGoEasy68.0%
0520Detect CapitalGoEasy55.7%
0524Longest Word in Dictionary through DeletingGoMedium50.9%
0535Encode and Decode TinyURLGoMedium85.4%
0537Complex Number MultiplicationGoMedium71.1%
0541Reverse String IIGoEasy50.2%
0551Student Attendance Record IGoEasy47.6%
0557Reverse Words in a String IIIGoEasy78.7%
0567Permutation in StringGoMedium44.7%
0583Delete Operation for Two StringsGoMedium55.8%
0599Minimum Index Sum of Two ListsGoEasy52.8%
0609Find Duplicate File in SystemGoMedium63.8%
0647Palindromic SubstringsGoMedium64.6%
0648Replace WordsGoMedium62.0%
0676Implement Magic DictionaryGoMedium56.6%
0677Map Sum PairsGoMedium57.0%
0692Top K Frequent WordsGoMedium54.4%
0696Count Binary SubstringsGoEasy64.9%
0709To Lower CaseGoEasy81.4%
0720Longest Word in DictionaryGoMedium51.0%
0721Accounts MergeGoMedium55.9%
0726Number of AtomsGoHard51.7%
0745Prefix and Suffix SearchGoHard36.5%
0748Shortest Completing WordGoEasy58.9%
0752Open the LockGoMedium55.3%
0763Partition LabelsGoMedium79.6%
0767Reorganize StringGoMediumO(n log n)O(log n)❤️52.1%
0771Jewels and StonesGoEasy87.7%
0784Letter Case PermutationGoMedium72.4%
0791Custom Sort StringGoMedium69.2%
0792Number of Matching SubsequencesGoMedium50.5%
0794Valid Tic-Tac-Toe StateGoMedium35.2%
0811Subdomain Visit CountGoMedium74.2%
0816Ambiguous CoordinatesGoMedium55.9%
0819Most Common WordGoEasy45.2%
0820Short Encoding of WordsGoMedium55.3%
0821Shortest Distance to a CharacterGoEasy71.0%
0828Count Unique Characters of All Substrings of a Given StringGoHard49.9%
0830Positions of Large GroupsGoEasy51.4%
0838Push DominoesGoMedium52.3%
0839Similar String GroupsGoHard45.5%
0842Split Array into Fibonacci SequenceGoMediumO(n^2)O(1)❤️37.8%
0844Backspace String CompareGoEasy48.0%
0856Score of ParenthesesGoMediumO(n)O(n)65.4%
0859Buddy StringsGoEasy28.8%
0880Decoded String at IndexGoMedium28.3%
0884Uncommon Words from Two SentencesGoEasy65.6%
0890Find and Replace PatternGoMedium75.6%
0916Word SubsetsGoMedium52.6%
0921Minimum Add to Make Parentheses ValidGoMedium77.1%
0925Long Pressed NameGoEasyO(n)O(1)34.6%
0942DI String MatchGoEasy75.9%
0949Largest Time for Given DigitsGoMedium35.4%
0953Verifying an Alien DictionaryGoEasy52.5%
0966Vowel SpellcheckerGoMedium51.6%
0981Time Based Key-Value StoreGoMedium52.7%
0984String Without AAA or BBBGoMedium42.3%
0990Satisfiability of Equality EquationsGoMedium50.1%
1002Find Common CharactersGoEasy68.4%
1003Check If Word Is Valid After SubstitutionsGoMediumO(n)O(1)57.9%
1021Remove Outermost ParenthesesGoEasy79.8%
1028Recover a Tree From Preorder TraversalGoHard72.4%
1047Remove All Adjacent Duplicates In StringGoEasy70.9%
1048Longest String ChainGoMedium57.8%
1078Occurrences After BigramGoEasy64.2%
1079Letter Tile PossibilitiesGoMedium76.1%
1108Defanging an IP AddressGoEasy89.0%
1111Maximum Nesting Depth of Two Valid Parentheses StringsGoMedium73.2%
1143Longest Common SubsequenceGoMedium58.9%
1154Day of the YearGoEasy50.9%
1160Find Words That Can Be Formed by CharactersGoEasy67.7%
1170Compare Strings by Frequency of the Smallest CharacterGoMedium61.1%
1178Number of Valid Words for Each PuzzleGoHard46.8%
1189Maximum Number of BalloonsGoEasy62.5%
1190Reverse Substrings Between Each Pair of ParenthesesGoMedium65.7%
1202Smallest String With SwapsGoMedium57.1%
1208Get Equal Substrings Within BudgetGoMedium46.5%
1209Remove All Adjacent Duplicates in String IIGoMedium55.9%
1221Split a String in Balanced StringsGoEasy84.6%
1234Replace the Substring for Balanced StringGoMedium36.2%
1239Maximum Length of a Concatenated String with Unique CharactersGoMedium50.5%
1249Minimum Remove to Make Valid ParenthesesGoMedium65.7%
1268Search Suggestions SystemGoMedium65.3%
1332Remove Palindromic SubsequencesGoEasy69.6%
1396Design Underground SystemGoMedium73.5%
1446Consecutive CharactersGoEasy62.0%
1455Check If a Word Occurs As a Prefix of Any Word in a SentenceGoEasy64.5%
1461Check If a String Contains All Binary Codes of Size KGoMedium54.5%
1573Number of Ways to Split a StringGoMedium32.1%
1576Replace All ?’s to Avoid Consecutive Repeating CharactersGoEasy49.7%
1614Maximum Nesting Depth of the ParenthesesGoEasy82.9%
1624Largest Substring Between Two Equal CharactersGoEasy59.3%
1629Slowest KeyGoEasy59.6%
1647Minimum Deletions to Make Character Frequencies UniqueGoMedium56.5%
1653Minimum Deletions to Make String BalancedGoMedium56.6%
1657Determine if Two Strings Are CloseGoMedium54.5%
1662Check If Two String Arrays are EquivalentGoEasy82.0%
1663Smallest String With A Given Numeric ValueGoMedium67.0%
1668Maximum Repeating SubstringGoEasy39.6%
1678Goal Parser InterpretationGoEasy85.8%
1684Count the Number of Consistent StringsGoEasy81.8%
1689Partitioning Into Minimum Number Of Deci-Binary NumbersGoMedium87.8%
1694Reformat Phone NumberGoEasy64.9%
1704Determine if String Halves Are AlikeGoEasy78.0%
1736Latest Time by Replacing Hidden DigitsGoEasy42.1%
1758Minimum Changes To Make Alternating Binary StringGoEasy59.2%
1763Longest Nice SubstringGoEasy61.8%
1816Truncate SentenceGoEasy81.3%
2167Minimum Time to Remove All Cars Containing Illegal GoodsGoHard39.1%
2182Construct String With Repeat LimitGoMedium51.1%
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