String

String

• 3504. Longest Palindrome After Substring Concatenation II
• 3503. Longest Palindrome After Substring Concatenation I
• 3501. Maximize Active Section with Trade II
• 3499. Maximize Active Section with Trade I
• 3498. Reverse Degree of a String
• 3491. Phone Number Prefix
• 3485. Longest Common Prefix of K Strings After Removal
• 3484. Design Spreadsheet
• 3481. Apply Substitutions
• 3474. Lexicographically Smallest Generated String
• 3472. Longest Palindromic Subsequence After at Most K Operations
• 3463. Check If Digits Are Equal in String After Operations II
• 3461. Check If Digits Are Equal in String After Operations I
• 3460. Longest Common Prefix After at Most One Removal
• 3458. Select K Disjoint Special Substrings
• 3456. Find Special Substring of Length K
• 3455. Shortest Matching Substring
• 3448. Count Substrings Divisible By Last Digit
• 3445. Maximum Difference Between Even and Odd Frequency II
• 3443. Maximum Manhattan Distance After K Changes
• 3442. Maximum Difference Between Even and Odd Frequency I
• 3441. Minimum Cost Good Caption
• 3438. Find Valid Pair of Adjacent Digits in String
• 3435. Frequencies of Shortest Supersequences
• 3412. Find Mirror Score of a String
• 3407. Substring Matching Pattern
• 3406. Find the Lexicographically Largest String From the Box II
• 3403. Find the Lexicographically Largest String From the Box I
• 3399. Smallest Substring With Identical Characters II
• 3389. Minimum Operations to Make Character Frequencies Equal
• 3387. Maximize Amount After Two Days of Conversions
• 3365. Rearrange K Substrings to Form Target String
• 3361. Shift Distance Between Two Strings
• 3352. Count K-Reducible Numbers Less Than N
• 3348. Smallest Divisible Digit Product II
• 3343. Count Number of Balanced Permutations
• 3340. Check Balanced String
• 3337. Total Characters in String After Transformations II
• 3335. Total Characters in String After Transformations I
• 3333. Find the Original Typed String II
• 3331. Find Subtree Sizes After Changes
• 3330. Find the Original Typed String I
• 3329. Count Substrings With K-Frequency Characters II
• 3327. Check if DFS Strings Are Palindromes
• 3325. Count Substrings With K-Frequency Characters I
• 3324. Find the Sequence of Strings Appeared on the Screen
• 3320. Count The Number of Winning Sequences
• 3316. Find Maximum Removals From Source String
• 3306. Count of Substrings Containing Every Vowel and K Consonants II
• 3305. Count of Substrings Containing Every Vowel and K Consonants I
• 3303. Find the Occurrence of First Almost Equal Substring
• 3302. Find the Lexicographically Smallest Valid Sequence
• 3298. Count Substrings That Can Be Rearranged to Contain a String II
• 3297. Count Substrings That Can Be Rearranged to Contain a String I
• 3295. Report Spam Message
• 3292. Minimum Number of Valid Strings to Form Target II
• 3291. Minimum Number of Valid Strings to Form Target I
• 3280. Convert Date to Binary
• 3279. Maximum Total Area Occupied by Pistons
• 3274. Check if Two Chessboard Squares Have the Same Color
• 3271. Hash Divided String
• 3261. Count Substrings That Satisfy K-Constraint II
• 3260. Find the Largest Palindrome Divisible by K
• 3258. Count Substrings That Satisfy K-Constraint I
• 3248. Snake in Matrix
• 3234. Count the Number of Substrings With Dominant Ones
• 3228. Maximum Number of Operations to Move Ones to the End
• 3227. Vowels Game in a String
• 3223. Minimum Length of String After Operations
• 3216. Lexicographically Smallest String After a Swap
• 3213. Construct String with Minimum Cost
• 3211. Generate Binary Strings Without Adjacent Zeros
• 3210. Find the Encrypted String
• 3174. Clear Digits
• 3170. Lexicographically Minimum String After Removing Stars
• 3168. Minimum Number of Chairs in a Waiting Room
• 3167. Better Compression of String
• 3163. String Compression III
• 3146. Permutation Difference between Two Strings
• 3144. Minimum Substring Partition of Equal Character Frequency
• 3143. Maximum Points Inside the Square
• 3138. Minimum Length of Anagram Concatenation
• 3137. Minimum Number of Operations to Make Word K-Periodic
• 3136. Valid Word
• 3135. Equalize Strings by Adding or Removing Characters at Ends
• 3125. Maximum Number That Makes Result of Bitwise AND Zero
• 3121. Count the Number of Special Characters II
• 3120. Count the Number of Special Characters I
• 3119. Maximum Number of Potholes That Can Be Fixed
• 3114. Latest Time You Can Obtain After Replacing Characters
• 3110. Score of a String
• 3106. Lexicographically Smallest String After Operations With Constraint
• 3104. Find Longest Self-Contained Substring
• 3093. Longest Common Suffix Queries
• 3090. Maximum Length Substring With Two Occurrences
• 3088. Make String Anti-palindrome
• 3085. Minimum Deletions to Make String K-Special
• 3084. Count Substrings Starting and Ending with Given Character
• 3083. Existence of a Substring in a String and Its Reverse
• 3081. Replace Question Marks in String to Minimize Its Value
• 3078. Match Alphanumerical Pattern in Matrix I
• 3076. Shortest Uncommon Substring in an Array
• 3045. Count Prefix and Suffix Pairs II
• 3043. Find the Length of the Longest Common Prefix
• 3042. Count Prefix and Suffix Pairs I
• 3035. Maximum Palindromes After Operations
• 3031. Minimum Time to Revert Word to Initial State II
• 3029. Minimum Time to Revert Word to Initial State I
• 3019. Number of Changing Keys
• 3016. Minimum Number of Pushes to Type Word II
• 3014. Minimum Number of Pushes to Type Word I
• 3008. Find Beautiful Indices in the Given Array II
• 3006. Find Beautiful Indices in the Given Array I
• 3003. Maximize the Number of Partitions After Operations
• 2999. Count the Number of Powerful Integers
• 2983. Palindrome Rearrangement Queries
• 2982. Find Longest Special Substring That Occurs Thrice II
• 2981. Find Longest Special Substring That Occurs Thrice I
• 2977. Minimum Cost to Convert String II
• 2976. Minimum Cost to Convert String I
• 2957. Remove Adjacent Almost-Equal Characters
• 2955. Number of Same-End Substrings
• 2953. Count Complete Substrings
• 2950. Number of Divisible Substrings
• 2949. Count Beautiful Substrings II
• 2947. Count Beautiful Substrings I
• 2942. Find Words Containing Character
• 2938. Separate Black and White Balls
• 2937. Make Three Strings Equal
• 2933. High-Access Employees
• 2914. Minimum Number of Changes to Make Binary String Beautiful
• 2911. Minimum Changes to Make K Semi-palindromes
• 2904. Shortest and Lexicographically Smallest Beautiful String
• 2901. Longest Unequal Adjacent Groups Subsequence II
• 2900. Longest Unequal Adjacent Groups Subsequence I
• 2896. Apply Operations to Make Two Strings Equal
• 2868. The Wording Game
• 2864. Maximum Odd Binary Number
• 2851. String Transformation
• 2844. Minimum Operations to Make a Special Number
• 2842. Count K-Subsequences of a String With Maximum Beauty
• 2840. Check if Strings Can be Made Equal With Operations II
• 2839. Check if Strings Can be Made Equal With Operations I
• 2833. Furthest Point From Origin
• 2828. Check if a String Is an Acronym of Words
• 2825. Make String a Subsequence Using Cyclic Increments
• 2810. Faulty Keyboard
• 2802. Find The K-th Lucky Number
• 2801. Count Stepping Numbers in Range
• 2800. Shortest String That Contains Three Strings
• 2788. Split Strings by Separator
• 2785. Sort Vowels in a String
• 2781. Length of the Longest Valid Substring
• 2767. Partition String Into Minimum Beautiful Substrings
• 2746. Decremental String Concatenation
• 2744. Find Maximum Number of String Pairs
• 2743. Count Substrings Without Repeating Character
• 2734. Lexicographically Smallest String After Substring Operation
• 2730. Find the Longest Semi-Repetitive Substring
• 2719. Count of Integers
• 2716. Minimize String Length
• 2712. Minimum Cost to Make All Characters Equal
• 2710. Remove Trailing Zeros From a String
• 2707. Extra Characters in a String
• 2697. Lexicographically Smallest Palindrome
• 2696. Minimum String Length After Removing Substrings
• 2678. Number of Senior Citizens
• 2663. Lexicographically Smallest Beautiful String
• 2645. Minimum Additions to Make Valid String
• 2609. Find the Longest Balanced Substring of a Binary String
• 2606. Find the Substring With Maximum Cost
• 2590. Design a Todo List
• 2586. Count the Number of Vowel Strings in Range
• 2575. Find the Divisibility Array of a String
• 2573. Find the String with LCP
• 2565. Subsequence With the Minimum Score
• 2564. Substring XOR Queries
• 2559. Count Vowel Strings in Ranges
• 2546. Apply Bitwise Operations to Make Strings Equal
• 2539. Count the Number of Good Subsequences
• 2531. Make Number of Distinct Characters Equal
• 2522. Partition String Into Substrings With Values at Most K
• 2516. Take K of Each Character From Left and Right
• 2515. Shortest Distance to Target String in a Circular Array
• 2514. Count Anagrams
• 2512. Reward Top K Students
• 2506. Count Pairs Of Similar Strings
• 2496. Maximum Value of a String in an Array
• 2490. Circular Sentence
• 2489. Number of Substrings With Fixed Ratio
• 2486. Append Characters to String to Make Subsequence
• 2484. Count Palindromic Subsequences
• 2483. Minimum Penalty for a Shop
• 2478. Number of Beautiful Partitions
• 2472. Maximum Number of Non-overlapping Palindrome Substrings
• 2468. Split Message Based on Limit
• 2456. Most Popular Video Creator
• 2452. Words Within Two Edits of Dictionary
• 2451. Odd String Difference
• 2450. Number of Distinct Binary Strings After Applying Operations
• 2446. Determine if Two Events Have Conflict
• 2437. Number of Valid Clock Times
• 2434. Using a Robot to Print the Lexicographically Smallest String
• 2430. Maximum Deletions on a String
• 2423. Remove Letter To Equalize Frequency
• 2418. Sort the People
• 2416. Sum of Prefix Scores of Strings
• 2414. Length of the Longest Alphabetical Continuous Substring
• 2409. Count Days Spent Together
• 2408. Design SQL
• 2405. Optimal Partition of String
• 2399. Check Distances Between Same Letters
• 2391. Minimum Amount of Time to Collect Garbage
• 2390. Removing Stars From a String
• 2384. Largest Palindromic Number
• 2381. Shifting Letters II
• 2380. Time Needed to Rearrange a Binary String
• 2379. Minimum Recolors to Get K Consecutive Black Blocks
• 2375. Construct Smallest Number From DI String
• 2370. Longest Ideal Subsequence
• 2353. Design a Food Rating System
• 2351. First Letter to Appear Twice
• 2343. Query Kth Smallest Trimmed Number
• 2337. Move Pieces to Obtain a String
• 2330. Valid Palindrome IV
• 2325. Decode the Message
• 2315. Count Asterisks
• 2311. Longest Binary Subsequence Less Than or Equal to K
• 2309. Greatest English Letter in Upper and Lower Case
• 2306. Naming a Company
• 2301. Match Substring After Replacement
• 2299. Strong Password Checker II
• 2296. Design a Text Editor
• 2288. Apply Discount to Prices
• 2287. Rearrange Characters to Make Target String
• 2284. Sender With Largest Word Count
• 2283. Check if Number Has Equal Digit Count and Digit Value
• 2278. Percentage of Letter in String
• 2273. Find Resultant Array After Removing Anagrams
• 2269. Find the K-Beauty of a Number
• 2268. Minimum Number of Keypresses
• 2266. Count Number of Texts
• 2264. Largest 3-Same-Digit Number in String
• 2262. Total Appeal of A String
• 2259. Remove Digit From Number to Maximize Result
• 2255. Count Prefixes of a Given String
• 2246. Longest Path With Different Adjacent Characters
• 2243. Calculate Digit Sum of a String
• 2232. Minimize Result by Adding Parentheses to Expression
• 2227. Encrypt and Decrypt Strings
• 2224. Minimum Number of Operations to Convert Time
• 2223. Sum of Scores of Built Strings
• 2222. Number of Ways to Select Buildings
• 2213. Longest Substring of One Repeating Character
• 2211. Count Collisions on a Road
• 2209. Minimum White Tiles After Covering With Carpets
• 2207. Maximize Number of Subsequences in a String
• 2194. Cells in a Range on an Excel Sheet
• 2193. Minimum Number of Moves to Make Palindrome
• 2186. Minimum Number of Steps to Make Two Strings Anagram II
• 2185. Counting Words With a Given Prefix
• 2182. Construct String With Repeat Limit
• 2168. Unique Substrings With Equal Digit Frequency
• 2167. Minimum Time to Remove All Cars Containing Illegal Goods
• 2166. Design Bitset
• 2157. Groups of Strings
• 2156. Find Substring With Given Hash Value
• 2147. Number of Ways to Divide a Long Corridor
• 2138. Divide a String Into Groups of Size k
• 2135. Count Words Obtained After Adding a Letter
• 2131. Longest Palindrome by Concatenating Two Letter Words
• 2129. Capitalize the Title
• 2125. Number of Laser Beams in a Bank
• 2124. Check if All A's Appears Before All B's
• 2120. Execution of All Suffix Instructions Staying in a Grid
• 2116. Check if a Parentheses String Can Be Valid
• 2115. Find All Possible Recipes from Given Supplies
• 2114. Maximum Number of Words Found in Sentences
• 2109. Adding Spaces to a String
• 2108. Find First Palindromic String in the Array
• 2103. Rings and Rods
• 2096. Step-By-Step Directions From a Binary Tree Node to Another
• 2086. Minimum Number of Food Buckets to Feed the Hamsters
• 2085. Count Common Words With One Occurrence
• 2083. Substrings That Begin and End With the Same Letter
• 2075. Decode the Slanted Ciphertext
• 2068. Check Whether Two Strings are Almost Equivalent
• 2067. Number of Equal Count Substrings
• 2063. Vowels of All Substrings
• 2062. Count Vowel Substrings of a String
• 2060. Check if an Original String Exists Given Two Encoded Strings
• 2056. Number of Valid Move Combinations On Chessboard
• 2055. Plates Between Candles
• 2053. Kth Distinct String in an Array
• 2047. Number of Valid Words in a Sentence
• 2042. Check if Numbers Are Ascending in a Sentence
• 2038. Remove Colored Pieces if Both Neighbors are the Same Color
• 2030. Smallest K-Length Subsequence With Occurrences of a Letter
• 2027. Minimum Moves to Convert String
• 2024. Maximize the Confusion of an Exam
• 2023. Number of Pairs of Strings With Concatenation Equal to Target
• 2019. The Score of Students Solving Math Expression
• 2014. Longest Subsequence Repeated k Times
• 2011. Final Value of Variable After Performing Operations
• 2002. Maximum Product of the Length of Two Palindromic Subsequences
• 2000. Reverse Prefix of Word
• 1987. Number of Unique Good Subsequences
• 1985. Find the Kth Largest Integer in the Array
• 1980. Find Unique Binary String
• 1977. Number of Ways to Separate Numbers
• 1974. Minimum Time to Type Word Using Special Typewriter
• 1967. Number of Strings That Appear as Substrings in Word
• 1963. Minimum Number of Swaps to Make the String Balanced
• 1961. Check If String Is a Prefix of Array
• 1960. Maximum Product of the Length of Two Palindromic Substrings
• 1957. Delete Characters to Make Fancy String
• 1948. Delete Duplicate Folders in System
• 1946. Largest Number After Mutating Substring
• 1945. Sum of Digits of String After Convert
• 1941. Check if All Characters Have Equal Number of Occurrences
• 1935. Maximum Number of Words You Can Type
• 1933. Check if String Is Decomposable Into Value-Equal Substrings
• 1930. Unique Length-3 Palindromic Subsequences
• 1927. Sum Game
• 1915. Number of Wonderful Substrings
• 1910. Remove All Occurrences of a Substring
• 1904. The Number of Full Rounds You Have Played
• 1903. Largest Odd Number in String
• 1898. Maximum Number of Removable Characters
• 1897. Redistribute Characters to Make All Strings Equal
• 1896. Minimum Cost to Change the Final Value of Expression
• 1888. Minimum Number of Flips to Make the Binary String Alternating
• 1881. Maximum Value after Insertion
• 1880. Check if Word Equals Summation of Two Words
• 1876. Substrings of Size Three with Distinct Characters
• 1871. Jump Game VII
• 1869. Longer Contiguous Segments of Ones than Zeros
• 1864. Minimum Number of Swaps to Make the Binary String Alternating
• 1859. Sorting the Sentence
• 1850. Minimum Adjacent Swaps to Reach the Kth Smallest Number
• 1849. Splitting a String Into Descending Consecutive Values
• 1844. Replace All Digits with Characters
• 1842. Next Palindrome Using Same Digits
• 1839. Longest Substring Of All Vowels in Order
• 1832. Check if the Sentence Is Pangram
• 1830. Minimum Number of Operations to Make String Sorted
• 1816. Truncate Sentence
• 1813. Sentence Similarity III
• 1812. Determine Color of a Chessboard Square
• 1807. Evaluate the Bracket Pairs of a String
• 1805. Number of Different Integers in a String
• 1804. Implement Trie II (Prefix Tree)
• 1796. Second Largest Digit in a String
• 1794. Count Pairs of Equal Substrings With Minimum Difference
• 1790. Check if One String Swap Can Make Strings Equal
• 1784. Check if Binary String Has at Most One Segment of Ones
• 1781. Sum of Beauty of All Substrings
• 1773. Count Items Matching a Rule
• 1772. Sort Features by Popularity
• 1771. Maximize Palindrome Length From Subsequences
• 1769. Minimum Number of Operations to Move All Balls to Each Box
• 1768. Merge Strings Alternately
• 1763. Longest Nice Substring
• 1759. Count Number of Homogenous Substrings
• 1758. Minimum Changes To Make Alternating Binary String
• 1754. Largest Merge Of Two Strings
• 1750. Minimum Length of String After Deleting Similar Ends
• 1745. Palindrome Partitioning IV
• 1737. Change Minimum Characters to Satisfy One of Three Conditions
• 1736. Latest Time by Replacing Hidden Digits
• 1717. Maximum Score From Removing Substrings
• 1704. Determine if String Halves Are Alike
• 1702. Maximum Binary String After Change
• 1698. Number of Distinct Substrings in a String
• 1694. Reformat Phone Number
• 1689. Partitioning Into Minimum Number Of Deci-Binary Numbers
• 1684. Count the Number of Consistent Strings
• 1682. Longest Palindromic Subsequence II
• 1678. Goal Parser Interpretation
• 1668. Maximum Repeating Substring
• 1663. Smallest String With A Given Numeric Value
• 1662. Check If Two String Arrays are Equivalent
• 1657. Determine if Two Strings Are Close
• 1653. Minimum Deletions to Make String Balanced
• 1647. Minimum Deletions to Make Character Frequencies Unique
• 1639. Number of Ways to Form a Target String Given a Dictionary
• 1638. Count Substrings That Differ by One Character
• 1629. Slowest Key
• 1625. Lexicographically Smallest String After Applying Operations
• 1624. Largest Substring Between Two Equal Characters
• 1618. Maximum Font to Fit a Sentence in a Screen
• 1616. Split Two Strings to Make Palindrome
• 1614. Maximum Nesting Depth of the Parentheses
• 1604. Alert Using Same Key-Card Three or More Times in a One Hour Period
• 1598. Crawler Log Folder
• 1597. Build Binary Expression Tree From Infix Expression
• 1593. Split a String Into the Max Number of Unique Substrings
• 1592. Rearrange Spaces Between Words
• 1585. Check If String Is Transformable With Substring Sort Operations
• 1578. Minimum Time to Make Rope Colorful
• 1576. Replace All ?'s to Avoid Consecutive Repeating Characters
• 1573. Number of Ways to Split a String
• 1556. Thousand Separator
• 1554. Strings Differ by One Character
• 1545. Find Kth Bit in Nth Binary String
• 1544. Make The String Great
• 1542. Find Longest Awesome Substring
• 1541. Minimum Insertions to Balance a Parentheses String
• 1540. Can Convert String in K Moves
• 1531. String Compression II
• 1529. Minimum Suffix Flips
• 1528. Shuffle String
• 1525. Number of Good Ways to Split a String
• 1520. Maximum Number of Non-Overlapping Substrings
• 1513. Number of Substrings With Only 1s
• 1507. Reformat Date
• 1505. Minimum Possible Integer After at Most K Adjacent Swaps On Digits
• 1496. Path Crossing
• 1487. Making File Names Unique
• 1461. Check If a String Contains All Binary Codes of Size K
• 1456. Maximum Number of Vowels in a Substring of Given Length
• 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence
• 1452. People Whose List of Favorite Companies Is Not a Subset of Another List
• 1451. Rearrange Words in a Sentence
• 1447. Simplified Fractions
• 1446. Consecutive Characters
• 1436. Destination City
• 1433. Check If a String Can Break Another String
• 1427. Perform String Shifts
• 1422. Maximum Score After Splitting a String
• 1419. Minimum Number of Frogs Croaking
• 1418. Display Table of Food Orders in a Restaurant
• 1417. Reformat The String
• 1416. Restore The Array
• 1415. The k-th Lexicographical String of All Happy Strings of Length n
• 1410. HTML Entity Parser
• 1408. String Matching in an Array
• 1405. Longest Happy String
• 1404. Number of Steps to Reduce a Number in Binary Representation to One
• 1400. Construct K Palindrome Strings
• 1397. Find All Good Strings
• 1396. Design Underground System
• 1392. Longest Happy Prefix
• 1374. Generate a String With Characters That Have Odd Counts
• 1371. Find the Longest Substring Containing Vowels in Even Counts
• 1370. Increasing Decreasing String
• 1366. Rank Teams by Votes
• 1360. Number of Days Between Two Dates
• 1358. Number of Substrings Containing All Three Characters
• 1347. Minimum Number of Steps to Make Two Strings Anagram
• 1332. Remove Palindromic Subsequences
• 1328. Break a Palindrome
• 1324. Print Words Vertically
• 1320. Minimum Distance to Type a Word Using Two Fingers
• 1316. Distinct Echo Substrings
• 1312. Minimum Insertion Steps to Make a String Palindrome
• 1309. Decrypt String from Alphabet to Integer Mapping
• 1307. Verbal Arithmetic Puzzle
• 1297. Maximum Number of Occurrences of a Substring
• 1286. Iterator for Combination
• 1278. Palindrome Partitioning III
• 1271. Hexspeak
• 1268. Search Suggestions System
• 1258. Synonymous Sentences
• 1257. Smallest Common Region
• 1256. Encode Number
• 1255. Maximum Score Words Formed by Letters
• 1249. Minimum Remove to Make Valid Parentheses
• 1247. Minimum Swaps to Make Strings Equal
• 1239. Maximum Length of a Concatenated String with Unique Characters
• 1236. Web Crawler
• 1234. Replace the Substring for Balanced String
• 1233. Remove Sub-Folders from the Filesystem
• 1221. Split a String in Balanced Strings
• 1216. Valid Palindrome III
• 1209. Remove All Adjacent Duplicates in String II
• 1208. Get Equal Substrings Within Budget
• 1202. Smallest String With Swaps
• 1190. Reverse Substrings Between Each Pair of Parentheses
• 1189. Maximum Number of Balloons
• 1181. Before and After Puzzle
• 1180. Count Substrings with Only One Distinct Letter
• 1178. Number of Valid Words for Each Puzzle
• 1177. Can Make Palindrome from Substring
• 1170. Compare Strings by Frequency of the Smallest Character
• 1169. Invalid Transactions
• 1166. Design File System
• 1165. Single-Row Keyboard
• 1163. Last Substring in Lexicographical Order
• 1160. Find Words That Can Be Formed by Characters
• 1156. Swap For Longest Repeated Character Substring
• 1154. Day of the Year
• 1153. String Transforms Into Another String
• 1147. Longest Chunked Palindrome Decomposition
• 1143. Longest Common Subsequence
• 1138. Alphabet Board Path
• 1119. Remove Vowels from a String
• 1111. Maximum Nesting Depth of Two Valid Parentheses Strings
• 1108. Defanging an IP Address
• 1106. Parsing A Boolean Expression
• 1100. Find K-Length Substrings With No Repeated Characters
• 1096. Brace Expansion II
• 1092. Shortest Common Supersequence
• 1087. Brace Expansion
• 1081. Smallest Subsequence of Distinct Characters
• 1079. Letter Tile Possibilities
• 1078. Occurrences After Bigram
• 1071. Greatest Common Divisor of Strings
• 1065. Index Pairs of a String
• 1062. Longest Repeating Substring
• 1061. Lexicographically Smallest Equivalent String
• 1058. Minimize Rounding Error to Meet Target
• 1055. Shortest Way to Form String
• 1048. Longest String Chain
• 1047. Remove All Adjacent Duplicates In String
• 1044. Longest Duplicate Substring
• 1041. Robot Bounded In Circle
• 1032. Stream of Characters
• 1028. Recover a Tree From Preorder Traversal
• 1023. Camelcase Matching
• 1021. Remove Outermost Parentheses
• 1016. Binary String With Substrings Representing 1 To N
• 1003. Check If Word Is Valid After Substitutions
• 1002. Find Common Characters
• 990. Satisfiability of Equality Equations
• 988. Smallest String Starting From Leaf
• 984. String Without AAA or BBB
• 981. Time Based Key-Value Store
• 972. Equal Rational Numbers
• 966. Vowel Spellchecker
• 960. Delete Columns to Make Sorted III
• 955. Delete Columns to Make Sorted II
• 953. Verifying an Alien Dictionary
• 949. Largest Time for Given Digits
• 944. Delete Columns to Make Sorted
• 943. Find the Shortest Superstring
• 942. DI String Match
• 940. Distinct Subsequences II
• 937. Reorder Data in Log Files
• 936. Stamping The Sequence
• 929. Unique Email Addresses
• 926. Flip String to Monotone Increasing
• 925. Long Pressed Name
• 921. Minimum Add to Make Parentheses Valid
• 917. Reverse Only Letters
• 916. Word Subsets
• 906. Super Palindromes
• 903. Valid Permutations for DI Sequence
• 902. Numbers At Most N Given Digit Set
• 899. Orderly Queue
• 893. Groups of Special-Equivalent Strings
• 890. Find and Replace Pattern
• 884. Uncommon Words from Two Sentences
• 880. Decoded String at Index
• 859. Buddy Strings
• 856. Score of Parentheses
• 854. K-Similar Strings
• 848. Shifting Letters
• 844. Backspace String Compare
• 843. Guess the Word
• 842. Split Array into Fibonacci Sequence
• 839. Similar String Groups
• 838. Push Dominoes
• 833. Find And Replace in String
• 831. Masking Personal Information
• 830. Positions of Large Groups
• 828. Count Unique Characters of All Substrings of a Given String
• 824. Goat Latin
• 821. Shortest Distance to a Character
• 820. Short Encoding of Words
• 819. Most Common Word
• 816. Ambiguous Coordinates
• 811. Subdomain Visit Count
• 809. Expressive Words
• 806. Number of Lines To Write String
• 804. Unique Morse Code Words
• 800. Similar RGB Color
• 796. Rotate String
• 792. Number of Matching Subsequences
• 791. Custom Sort String
• 784. Letter Case Permutation
• 777. Swap Adjacent in LR String
• 772. Basic Calculator III
• 771. Jewels and Stones
• 770. Basic Calculator IV
• 767. Reorganize String
• 763. Partition Labels
• 761. Special Binary String
• 758. Bold Words in String
• 752. Open the Lock
• 751. IP to CIDR
• 748. Shortest Completing Word
• 745. Prefix and Suffix Search
• 737. Sentence Similarity II
• 736. Parse Lisp Expression
• 734. Sentence Similarity
• 730. Count Different Palindromic Subsequences
• 727. Minimum Window Subsequence
• 726. Number of Atoms
• 722. Remove Comments
• 721. Accounts Merge
• 720. Longest Word in Dictionary
• 712. Minimum ASCII Delete Sum for Two Strings
• 709. To Lower Case
• 696. Count Binary Substrings
• 692. Top K Frequent Words
• 691. Stickers to Spell Word
• 686. Repeated String Match
• 681. Next Closest Time
• 680. Valid Palindrome II
• 678. Valid Parenthesis String
• 677. Map Sum Pairs
• 676. Implement Magic Dictionary
• 664. Strange Printer
• 657. Robot Return to Origin
• 649. Dota2 Senate
• 648. Replace Words
• 647. Palindromic Substrings
• 642. Design Search Autocomplete System
• 640. Solve the Equation
• 639. Decode Ways II
• 635. Design Log Storage System
• 631. Design Excel Sum Formula
• 616. Add Bold Tag in String
• 609. Find Duplicate File in System
• 606. Construct String from Binary Tree
• 604. Design Compressed String Iterator
• 599. Minimum Index Sum of Two Lists
• 592. Fraction Addition and Subtraction
• 591. Tag Validator
• 588. Design In-Memory File System
• 583. Delete Operation for Two Strings
• 567. Permutation in String
• 564. Find the Closest Palindrome
• 557. Reverse Words in a String III
• 556. Next Greater Element III
• 555. Split Concatenated Strings
• 551. Student Attendance Record I
• 544. Output Contest Matches
• 541. Reverse String II
• 539. Minimum Time Difference
• 537. Complex Number Multiplication
• 536. Construct Binary Tree from String
• 535. Encode and Decode TinyURL
• 527. Word Abbreviation
• 524. Longest Word in Dictionary through Deleting
• 522. Longest Uncommon Subsequence II
• 521. Longest Uncommon Subsequence I
• 520. Detect Capital
• 516. Longest Palindromic Subsequence
• 514. Freedom Trail
• 500. Keyboard Row
• 499. The Maze III
• 488. Zuma Game
• 484. Find Permutation
• 482. License Key Formatting
• 481. Magical String
• 474. Ones and Zeroes
• 472. Concatenated Words
• 471. Encode String with Shortest Length
• 468. Validate IP Address
• 467. Unique Substrings in Wraparound String
• 466. Count The Repetitions
• 459. Repeated Substring Pattern
• 451. Sort Characters By Frequency
• 449. Serialize and Deserialize BST
• 443. String Compression
• 439. Ternary Expression Parser
• 438. Find All Anagrams in a String
• 434. Number of Segments in a String
• 433. Minimum Genetic Mutation
• 428. Serialize and Deserialize N-ary Tree
• 425. Word Squares
• 424. Longest Repeating Character Replacement
• 423. Reconstruct Original Digits from English
• 420. Strong Password Checker
• 418. Sentence Screen Fitting
• 415. Add Strings
• 412. Fizz Buzz
• 411. Minimum Unique Word Abbreviation
• 409. Longest Palindrome
• 408. Valid Word Abbreviation
• 402. Remove K Digits
• 399. Evaluate Division
• 395. Longest Substring with At Least K Repeating Characters
• 394. Decode String
• 392. Is Subsequence
• 389. Find the Difference
• 388. Longest Absolute File Path
• 387. First Unique Character in a String
• 385. Mini Parser
• 383. Ransom Note
• 358. Rearrange String k Distance Apart
• 345. Reverse Vowels of a String
• 344. Reverse String
• 340. Longest Substring with At Most K Distinct Characters
• 336. Palindrome Pairs
• 331. Verify Preorder Serialization of a Binary Tree
• 320. Generalized Abbreviation
• 318. Maximum Product of Word Lengths
• 316. Remove Duplicate Letters
• 306. Additive Number
• 301. Remove Invalid Parentheses
• 299. Bulls and Cows
• 297. Serialize and Deserialize Binary Tree
• 293. Flip Game
• 291. Word Pattern II
• 290. Word Pattern
• 288. Unique Word Abbreviation
• 282. Expression Add Operators
• 273. Integer to English Words
• 271. Encode and Decode Strings
• 269. Alien Dictionary
• 267. Palindrome Permutation II
• 266. Palindrome Permutation
• 257. Binary Tree Paths
• 249. Group Shifted Strings
• 248. Strobogrammatic Number III
• 247. Strobogrammatic Number II
• 246. Strobogrammatic Number
• 245. Shortest Word Distance III
• 244. Shortest Word Distance II
• 243. Shortest Word Distance
• 242. Valid Anagram
• 241. Different Ways to Add Parentheses
• 227. Basic Calculator II
• 224. Basic Calculator
• 214. Shortest Palindrome
• 212. Word Search II
• 211. Design Add and Search Words Data Structure
• 208. Implement Trie (Prefix Tree)
• 205. Isomorphic Strings
• 187. Repeated DNA Sequences
• 186. Reverse Words in a String II
• 179. Largest Number
• 171. Excel Sheet Column Number
• 168. Excel Sheet Column Title
• 166. Fraction to Recurring Decimal
• 165. Compare Version Numbers
• 161. One Edit Distance
• 159. Longest Substring with At Most Two Distinct Characters
• 151. Reverse Words in a String
• 140. Word Break II
• 139. Word Break
• 132. Palindrome Partitioning II
• 131. Palindrome Partitioning
• 127. Word Ladder
• 126. Word Ladder II
• 125. Valid Palindrome
• 115. Distinct Subsequences
• 97. Interleaving String
• 93. Restore IP Addresses
• 91. Decode Ways
• 87. Scramble String
• 79. Word Search
• 76. Minimum Window Substring
• 72. Edit Distance
• 71. Simplify Path
• 68. Text Justification
• 67. Add Binary
• 65. Valid Number
• 58. Length of Last Word
• 49. Group Anagrams
• 44. Wildcard Matching
• 43. Multiply Strings
• 38. Count and Say
• 32. Longest Valid Parentheses
• 30. Substring with Concatenation of All Words
• 28. Find the Index of the First Occurrence in a String
• 22. Generate Parentheses
• 20. Valid Parentheses
• 17. Letter Combinations of a Phone Number
• 14. Longest Common Prefix
• 13. Roman to Integer
• 12. Integer to Roman
• 10. Regular Expression Matching
• 8. String to Integer (atoi)
• 6. Zigzag Conversion
• 5. Longest Palindromic Substring
• 3. Longest Substring Without Repeating Characters