2.02 String

String #

No.TitleSolutionDifficultyTimeComplexitySpaceComplexityFavoriteAcceptance
0003Longest Substring Without Repeating CharactersGoMediumO(n)O(1)❤️32.5%
0005Longest Palindromic SubstringGoMedium31.5%
0006Zigzag ConversionGoMedium40.2%
0008String to Integer (atoi)GoMedium16.1%
0012Integer to RomanGoMedium58.5%
0013Roman to IntegerGoEasy57.7%
0014Longest Common PrefixGoEasy38.2%
0017Letter Combinations of a Phone NumberGoMediumO(log n)O(1)52.2%
0020Valid ParenthesesGoEasyO(log n)O(1)40.5%
0022Generate ParenthesesGoMediumO(log n)O(1)68.5%
0028Implement strStr()GoEasyO(n)O(1)35.7%
0030Substring with Concatenation of All WordsGoHardO(n)O(n)❤️27.4%
0032Longest Valid ParenthesesGoHard30.8%
0043Multiply StringsGoMedium36.9%
0049Group AnagramsGoMediumO(n log n)O(n)62.5%
0058Length of Last WordGoEasy35.3%
0065Valid NumberGoHard17.4%
0067Add BinaryGoEasy49.0%
0071Simplify PathGoMediumO(n)O(n)36.6%
0076Minimum Window SubstringGoHardO(n)O(n)❤️38.0%
0091Decode WaysGoMediumO(n)O(n)29.0%
0093Restore IP AddressesGoMediumO(n)O(n)❤️40.2%
0097Interleaving StringGoMedium34.1%
0115Distinct SubsequencesGoHard41.7%
0125Valid PalindromeGoEasyO(n)O(1)40.1%
0126Word Ladder IIGoHardO(n)O(n^2)❤️26.0%
0127Word LadderGoHard33.9%
0131Palindrome PartitioningGoMedium56.1%
0151Reverse Words in a StringGoMedium27.0%
0168Excel Sheet Column TitleGoEasy33.1%
0171Excel Sheet Column NumberGoEasy58.6%
0179Largest NumberGoMedium32.1%
0187Repeated DNA SequencesGoMedium43.2%
0205Isomorphic StringsGoEasy41.6%
0208Implement Trie (Prefix Tree)GoMedium56.1%
0211Design Add and Search Words Data StructureGoMedium42.6%
0212Word Search IIGoHard38.4%
0224Basic CalculatorGoHard39.7%
0227Basic Calculator IIGoMedium40.1%
0242Valid AnagramGoEasy60.4%
0257Binary Tree PathsGoEasy56.8%
0290Word PatternGoEasy39.1%
0297Serialize and Deserialize Binary TreeGoHard52.4%
0299Bulls and CowsGoMedium46.3%
0301Remove Invalid ParenthesesGoHard46.1%
0306Additive NumberGoMedium30.2%
0318Maximum Product of Word LengthsGoMedium56.1%
0331Verify Preorder Serialization of a Binary TreeGoMedium43.4%
0344Reverse StringGoEasyO(n)O(1)72.7%
0345Reverse Vowels of a StringGoEasyO(n)O(1)46.3%
0385Mini ParserGoMedium35.4%
0387First Unique Character in a StringGoEasy55.8%
0389Find the DifferenceGoEasy58.9%
0392Is SubsequenceGoEasy50.0%
0394Decode StringGoMedium54.8%
0395Longest Substring with At Least K Repeating CharactersGoMedium44.3%
0402Remove K DigitsGoMedium29.0%
0409Longest PalindromeGoEasy52.9%
0412Fizz BuzzGoEasy65.5%
0423Reconstruct Original Digits from EnglishGoMedium51.5%
0424Longest Repeating Character ReplacementGoMedium49.9%
0433Minimum Genetic MutationGoMedium45.0%
0434Number of Segments in a StringGoEasy37.9%
0438Find All Anagrams in a StringGoMedium46.7%
0451Sort Characters By FrequencyGoMedium66.9%
0474Ones and ZeroesGoMedium44.0%
0488Zuma GameGoHard37.5%
0500Keyboard RowGoEasy67.2%
0520Detect CapitalGoEasy54.3%
0524Longest Word in Dictionary through DeletingGoMedium50.7%
0535Encode and Decode TinyURLGoMedium83.1%
0537Complex Number MultiplicationGoMedium70.9%
0541Reverse String IIGoEasy49.9%
0551Student Attendance Record IGoEasy47.1%
0557Reverse Words in a String IIIGoEasy76.0%
0567Permutation in StringGoMedium44.3%
0583Delete Operation for Two StringsGoMedium54.0%
0599Minimum Index Sum of Two ListsGoEasy52.9%
0609Find Duplicate File in SystemGoMedium63.4%
0647Palindromic SubstringsGoMedium63.8%
0648Replace WordsGoMedium61.1%
0676Implement Magic DictionaryGoMedium56.2%
0677Map Sum PairsGoMedium56.9%
0692Top K Frequent WordsGoMedium53.9%
0696Count Binary SubstringsGoEasy63.2%
0709To Lower CaseGoEasy80.8%
0720Longest Word in DictionaryGoMedium50.3%
0721Accounts MergeGoMedium54.4%
0726Number of AtomsGoHard51.6%
0745Prefix and Suffix SearchGoHard35.8%
0748Shortest Completing WordGoEasy58.5%
0752Open the LockGoMedium55.1%
0763Partition LabelsGoMedium78.4%
0767Reorganize StringGoMediumO(n log n)O(log n)❤️51.3%
0771Jewels and StonesGoEasy87.4%
0784Letter Case PermutationGoMedium70.7%
0791Custom Sort StringGoMedium67.8%
0792Number of Matching SubsequencesGoMedium50.0%
0811Subdomain Visit CountGoMedium73.3%
0816Ambiguous CoordinatesGoMedium55.8%
0819Most Common WordGoEasy45.3%
0820Short Encoding of WordsGoMedium55.1%
0821Shortest Distance to a CharacterGoEasy70.7%
0828Count Unique Characters of All Substrings of a Given StringGoHard48.2%
0830Positions of Large GroupsGoEasy51.1%
0838Push DominoesGoMedium52.0%
0839Similar String GroupsGoHard44.2%
0842Split Array into Fibonacci SequenceGoMediumO(n^2)O(1)❤️37.4%
0844Backspace String CompareGoEasy47.5%
0856Score of ParenthesesGoMediumO(n)O(n)65.5%
0859Buddy StringsGoEasy28.7%
0880Decoded String at IndexGoMedium28.3%
0884Uncommon Words from Two SentencesGoEasy65.0%
0890Find and Replace PatternGoMedium75.5%
0916Word SubsetsGoMedium52.9%
0921Minimum Add to Make Parentheses ValidGoMedium77.2%
0925Long Pressed NameGoEasyO(n)O(1)35.4%
0942DI String MatchGoEasy75.1%
0949Largest Time for Given DigitsGoMedium35.7%
0953Verifying an Alien DictionaryGoEasy52.2%
0966Vowel SpellcheckerGoMedium51.7%
0981Time Based Key-Value StoreGoMedium53.1%
0984String Without AAA or BBBGoMedium40.3%
0990Satisfiability of Equality EquationsGoMedium49.1%
1002Find Common CharactersGoEasy68.5%
1003Check If Word Is Valid After SubstitutionsGoMediumO(n)O(1)57.3%
1021Remove Outermost ParenthesesGoEasy79.5%
1028Recover a Tree From Preorder TraversalGoHard71.9%
1047Remove All Adjacent Duplicates In StringGoEasy71.2%
1048Longest String ChainGoMedium57.2%
1078Occurrences After BigramGoEasy64.4%
1079Letter Tile PossibilitiesGoMedium76.1%
1108Defanging an IP AddressGoEasy88.7%
1111Maximum Nesting Depth of Two Valid Parentheses StringsGoMedium72.6%
1143Longest Common SubsequenceGoMedium58.8%
1154Day of the YearGoEasy50.8%
1160Find Words That Can Be Formed by CharactersGoEasy67.8%
1170Compare Strings by Frequency of the Smallest CharacterGoMedium60.8%
1178Number of Valid Words for Each PuzzleGoHard46.8%
1189Maximum Number of BalloonsGoEasy62.5%
1190Reverse Substrings Between Each Pair of ParenthesesGoMedium65.3%
1202Smallest String With SwapsGoMedium51.3%
1208Get Equal Substrings Within BudgetGoMedium45.6%
1209Remove All Adjacent Duplicates in String IIGoMedium56.1%
1221Split a String in Balanced StringsGoEasy84.7%
1234Replace the Substring for Balanced StringGoMedium35.5%
1239Maximum Length of a Concatenated String with Unique CharactersGoMedium50.7%
1249Minimum Remove to Make Valid ParenthesesGoMedium65.0%
1268Search Suggestions SystemGoMedium65.8%
1332Remove Palindromic SubsequencesGoEasy69.1%
1396Design Underground SystemGoMedium71.7%
1455Check If a Word Occurs As a Prefix of Any Word in a SentenceGoEasy64.4%
1461Check If a String Contains All Binary Codes of Size KGoMedium54.5%
1573Number of Ways to Split a StringGoMedium31.5%
1614Maximum Nesting Depth of the ParenthesesGoEasy82.9%
1624Largest Substring Between Two Equal CharactersGoEasy59.1%
1629Slowest KeyGoEasy59.8%
1647Minimum Deletions to Make Character Frequencies UniqueGoMedium55.9%
1653Minimum Deletions to Make String BalancedGoMedium54.1%
1657Determine if Two Strings Are CloseGoMedium54.7%
1662Check If Two String Arrays are EquivalentGoEasy82.0%
1663Smallest String With A Given Numeric ValueGoMedium64.1%
1668Maximum Repeating SubstringGoEasy39.4%
1678Goal Parser InterpretationGoEasy85.3%
1684Count the Number of Consistent StringsGoEasy81.7%
1689Partitioning Into Minimum Number Of Deci-Binary NumbersGoMedium87.9%
1694Reformat Phone NumberGoEasy65.1%
1704Determine if String Halves Are AlikeGoEasy78.4%
1736Latest Time by Replacing Hidden DigitsGoEasy41.9%
1758Minimum Changes To Make Alternating Binary StringGoEasy59.0%
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