String

177 problems

• 12.Integer to RomanMedium
• 13.Roman to IntegerEasy
• 14.Longest Common PrefixEasy
• 22.Generate ParenthesesMedium
• 30.Substring with Concatenation of All WordsHard
• 32.Longest Valid ParenthesesHard
• 38.Count and SayMedium
• 44.Wildcard MatchingHard
• 58.Length of Last WordEasy
• 67.Add BinaryEasy
• 68.Text JustificationHard
• 76.Minimum Window SubstringHard
• 87.Scramble StringHard
• 126.Word Ladder IIHard
• 165.Compare Version NumbersMedium
• 166.Fraction to Recurring DecimalMedium
• 171.Excel Sheet Column NumberEasy
• 179.Largest NumberMedium
• 212.Word Search IIHard
• 214.Shortest PalindromeHard
• 241.Different Ways to Add ParenthesesMedium
• 257.Binary Tree PathsEasy
• 273.Integer to English WordsHard
• 299.Bulls and CowsUnknown
• 316.Remove Duplicate LettersMedium
• 331.Verify Preorder Serialization of a Binary TreeUnknown
• 344.Reverse StringEasy
• 467.Unique Substrings in Wraparound StringMedium
• 474.Ones and ZeroesMedium
• 500.Keyboard RowEasy
• 539.Minimum Time DifferenceMedium
• 564.Find the Closest PalindromeHard
• 567.Permutation in StringMedium
• 592.Fraction Addition and SubtractionUnknown
• 657.Robot Return to OriginUnknown
• 664.Strange PrinterHard
• 678.Valid Parenthesis StringMedium
• 696.Count Binary SubstringsEasy
• 709.To Lower CaseEasy
• 712.Minimum ASCII Delete Sum for Two StringsMedium
• 726.Number of AtomsHard
• 761.Special Binary StringUnknown
• 763.Partition LabelsMedium
• 784.Letter Case PermutationMedium
• 796.Rotate StringEasy
• 820.Short Encoding of WordsMedium
• 821.Shortest Distance to a CharacterEasy
• 838.Push DominoesMedium
• 839.Similar String GroupsHard
• 856.Score of ParenthesesMedium
• 880.Decoded String at IndexMedium
• 884.Uncommon Words from Two SentencesEasy
• 890.Find and Replace PatternMedium
• 902.Numbers At Most N Given Digit SetHard
• 916.Word SubsetsMedium
• 917.Reverse Only LettersEasy
• 921.Minimum Add to Make Parentheses ValidMedium
• 944.Delete Columns to Make SortedEasy
• 955.Delete Columns to Make Sorted IIMedium
• 960.Delete Columns to Make Sorted IIIHard
• 966.Vowel SpellcheckerMedium
• 981.Time Based Key-Value StoreMedium
• 1028.Recover a Tree From Preorder TraversalHard
• 1061.Lexicographically Smallest Equivalent StringMedium
• 1079.Letter Tile PossibilitiesMedium
• 1081.Smallest Subsequence of Distinct CharactersMedium
• 1092.Shortest Common SupersequenceHard
• 1106.Parsing A Boolean ExpressionHard
• 1190.Reverse Substrings Between Each Pair of ParenthesesMedium
• 1233.Remove Sub-Folders from the FilesystemMedium
• 1358.Number of Substrings Containing All Three CharactersMedium
• 1371.Find the Longest Substring Containing Vowels in Even CountsMedium
• 1392.Longest Happy PrefixUnknown
• 1400.Construct K Palindrome StringsUnknown
• 1405.Longest Happy StringUnknown
• 1408.String Matching in an ArrayUnknown
• 1410.HTML Entity ParserUnknown
• 1415.The k-th Lexicographical String of All Happy Strings of Length nUnknown
• 1422.Maximum Score After Splitting a StringUnknown
• 1455.Check If a Word Occurs As a Prefix of Any Word in a SentenceUnknown
• 1461.Check If a String Contains All Binary Codes of Size KMedium
• 1487.Making File Names UniqueUnknown
• 1513.Number of Substrings With Only 1sUnknown
• 1529.Minimum Suffix FlipsUnknown
• 1545.Find Kth Bit in Nth Binary StringEasy
• 1573.Number of Ways to Split a StringUnknown
• 1578.Minimum Time to Make Rope ColorfulMedium
• 1593.Split a String Into the Max Number of Unique SubstringsMedium
• 1598.Crawler Log FolderEasy
• 1625.Lexicographically Smallest String After Applying OperationsUnknown
• 1639.Number of Ways to Form a Target String Given a DictionaryHard
• 1653.Minimum Deletions to Make String BalancedMedium
• 1678.Goal Parser InterpretationUnknown
• 1684.Count the Number of Consistent StringsEasy
• 1689.Partitioning Into Minimum Number Of Deci-Binary NumbersMedium
• 1717.Maximum Score From Removing SubstringsUnknown
• 1758.Minimum Changes To Make Alternating Binary StringUnknown
• 1763.Longest Nice SubstringEasy
• 1768.Merge Strings AlternatelyEasy
• 1769.Minimum Number of Operations to Move All Balls to Each BoxMedium
• 1784.Check if Binary String Has at Most One Segment of OnesUnknown
• 1790.Check if One String Swap Can Make Strings EqualEasy
• 1813.Sentence Similarity IIIUnknown
• 1844.Replace All Digits with CharactersEasy
• 1859.Sorting the SentenceUnknown
• 1888.Minimum Number of Flips to Make the Binary String AlternatingUnknown
• 1910.Remove All Occurrences of a SubstringUnknown
• 1930.Unique Length-3 Palindromic SubsequencesMedium
• 1935.Maximum Number of Words You Can TypeUnknown
• 1945.Sum of Digits of String After ConvertUnknown
• 1948.Delete Duplicate Folders in SystemUnknown
• 1957.Delete Characters to Make Fancy StringUnknown
• 1963.Minimum Number of Swaps to Make the String BalancedUnknown
• 1967.Number of Strings That Appear as Substrings in WordUnknown
• 1980.Find Unique Binary StringMedium
• 2011.Final Value of Variable After Performing OperationsUnknown
• 2014.Longest Subsequence Repeated k TimesUnknown
• 2053.Kth Distinct String in an ArrayUnknown
• 2096.Step-By-Step Directions From a Binary Tree Node to AnotherMedium
• 2109.Adding Spaces to a StringEasy
• 2116.Check if a Parentheses String Can Be ValidMedium
• 2131.Longest Palindrome by Concatenating Two Letter WordsMedium
• 2138.Divide a String Into Groups of Size kUnknown
• 2182.Construct String With Repeat LimitMedium
• 2185.Counting Words With a Given PrefixEasy
• 2264.Largest 3-Same-Digit Number in StringEasy
• 2273.Find Resultant Array After Removing AnagramsUnknown
• 2337.Move Pieces to Obtain a StringMedium
• 2375.Construct Smallest Number From DI StringMedium
• 2379.Minimum Recolors to Get K Consecutive Black BlocksEasy
• 2416.Sum of Prefix Scores of StringsHard
• 2418.Sort the PeopleEasy
• 2434.Using a Robot to Print the Lexicographically Smallest StringMedium
• 2490.Circular SentenceEasy
• 2516.Take K of Each Character From Left and RightMedium
• 2559.Count Vowel Strings in RangesMedium
• 2609.Find the Longest Balanced Substring of a Binary StringEasy
• 2645.Minimum Additions to Make Valid StringMedium
• 2678.Number of Senior CitizensEasy
• 2696.Minimum String Length After Removing SubstringsEasy
• 2707.Extra Characters in a StringMedium
• 2785.Sort Vowels in a StringMedium
• 2825.Make String a Subsequence Using Cyclic IncrementsMedium
• 2900.Longest Unequal Adjacent Groups Subsequence IEasy
• 2901.Longest Unequal Adjacent Groups Subsequence IIUnknown
• 2914.Minimum Number of Changes to Make Binary String BeautifulEasy
• 2930.Number of Strings Which Can Be Rearranged to Contain SubstringMedium
• 2942.Find Words Containing CharacterEasy
• 2976.Minimum Cost to Convert String IMedium
• 2977.Minimum Cost to Convert String IIUnknown
• 2981.Find Longest Special Substring That Occurs Thrice IMedium
• 2999.Count the Number of Powerful IntegersUnknown
• 3003.Maximize the Number of Partitions After OperationsUnknown
• 3016.Minimum Number of Pushes to Type Word IIMedium
• 3042.Count Prefix and Suffix Pairs IEasy
• 3043.Find the Length of the Longest Common PrefixEasy
• 3085.Minimum Deletions to Make String K-SpecialEasy
• 3136.Valid WordEasy
• 3163.String Compression IIIUnknown
• 3170.Lexicographically Minimum String After Removing StarsUnknown
• 3174.Clear DigitsEasy
• 3223.Minimum Length of String After OperationsUnknown
• 3227.Vowels Game in a StringUnknown
• 3234.Count the Number of Substrings With Dominant OnesEasy
• 3306.Count of Substrings Containing Every Vowel and K Consonants IIMedium
• 3330.Find the Original Typed String IEasy
• 3333.Find the Original Typed String IIUnknown
• 3335.Total Characters in String After Transformations IMedium
• 3337.Total Characters in String After Transformations IIUnknown
• 3403.Find the Lexicographically Largest String From the Box IUnknown
• 3442.Maximum Difference Between Even and Odd Frequency IMedium
• 3445.Maximum Difference Between Even and Odd Frequency IIMedium
• 3461.Check If Digits Are Equal in String After Operations IEasy
• 3541.Find Most Frequent Vowel and ConsonantUnknown
• 3606.Coupon Code ValidatorUnknown
• 3713.Longest Balanced Substring IUnknown
• 3714.Longest Balanced Substring IIUnknown