← back

Hash Table

675 questions · 0 seen

All Hash Table problems

Actions

⊣ Practice
⊣ Quiz

Problems

⊣ 1 Two Sum
⊣ 3 Longest Substring Without Repeating Characters
⊣ 12 Integer to Roman
⊣ 13 Roman to Integer
⊣ 17 Letter Combinations of a Phone Number
⊣ 30 Substring with Concatenation of All Words
⊣ 36 Valid Sudoku
⊣ 37 Sudoku Solver
⊣ 41 First Missing Positive
⊣ 49 Group Anagrams
⊣ 73 Set Matrix Zeroes
⊣ 76 Minimum Window Substring
⊣ 105 Construct Binary Tree from Preorder and Inorder Traversal
⊣ 106 Construct Binary Tree from Inorder and Postorder Traversal
⊣ 126 Word Ladder II
⊣ 127 Word Ladder
⊣ 128 Longest Consecutive Sequence
⊣ 133 Clone Graph
⊣ 138 Copy List with Random Pointer
⊣ 139 Word Break
⊣ 140 Word Break II
⊣ 141 Linked List Cycle
⊣ 142 Linked List Cycle II
⊣ 146 LRU Cache
⊣ 149 Max Points on a Line
⊣ 160 Intersection of Two Linked Lists
⊣ 166 Fraction to Recurring Decimal
⊣ 169 Majority Element
⊣ 187 Repeated DNA Sequences
⊣ 202 Happy Number
⊣ 205 Isomorphic Strings
⊣ 208 Implement Trie (Prefix Tree)
⊣ 217 Contains Duplicate
⊣ 219 Contains Duplicate II
⊣ 229 Majority Element II
⊣ 242 Valid Anagram
⊣ 264 Ugly Number II
⊣ 268 Missing Number
⊣ 290 Word Pattern
⊣ 299 Bulls and Cows
⊣ 336 Palindrome Pairs
⊣ 347 Top K Frequent Elements
⊣ 349 Intersection of Two Arrays
⊣ 350 Intersection of Two Arrays II
⊣ 352 Data Stream as Disjoint Intervals
⊣ 355 Design Twitter
⊣ 380 Insert Delete GetRandom O(1)
⊣ 381 Insert Delete GetRandom O(1) - Duplicates allowed
⊣ 383 Ransom Note
⊣ 387 First Unique Character in a String
⊣ 389 Find the Difference
⊣ 391 Perfect Rectangle
⊣ 395 Longest Substring with At Least K Repeating Characters
⊣ 398 Random Pick Index
⊣ 409 Longest Palindrome
⊣ 421 Maximum XOR of Two Numbers in an Array
⊣ 423 Reconstruct Original Digits from English
⊣ 424 Longest Repeating Character Replacement
⊣ 432 All O`one Data Structure
⊣ 433 Minimum Genetic Mutation
⊣ 438 Find All Anagrams in a String
⊣ 442 Find All Duplicates in an Array
⊣ 447 Number of Boomerangs
⊣ 448 Find All Numbers Disappeared in an Array
⊣ 451 Sort Characters By Frequency
⊣ 454 4Sum II
⊣ 457 Circular Array Loop
⊣ 460 LFU Cache
⊣ 480 Sliding Window Median
⊣ 491 Non-decreasing Subsequences
⊣ 496 Next Greater Element I
⊣ 500 Keyboard Row
⊣ 508 Most Frequent Subtree Sum
⊣ 519 Random Flip Matrix
⊣ 522 Longest Uncommon Subsequence II
⊣ 523 Continuous Subarray Sum
⊣ 525 Contiguous Array
⊣ 532 K-diff Pairs in an Array
⊣ 535 Encode and Decode TinyURL
⊣ 554 Brick Wall
⊣ 560 Subarray Sum Equals K
⊣ 567 Permutation in String
⊣ 575 Distribute Candies
⊣ 594 Longest Harmonious Subsequence
⊣ 599 Minimum Index Sum of Two Lists
⊣ 609 Find Duplicate File in System
⊣ 621 Task Scheduler
⊣ 632 Smallest Range Covering Elements from K Lists
⊣ 645 Set Mismatch
⊣ 648 Replace Words
⊣ 652 Find Duplicate Subtrees
⊣ 653 Two Sum IV - Input is a BST
⊣ 659 Split Array into Consecutive Subsequences
⊣ 676 Implement Magic Dictionary
⊣ 677 Map Sum Pairs
⊣ 690 Employee Importance
⊣ 691 Stickers to Spell Word
⊣ 692 Top K Frequent Words
⊣ 697 Degree of an Array
⊣ 705 Design HashSet
⊣ 706 Design HashMap
⊣ 710 Random Pick with Blacklist (PRO)
⊣ 720 Longest Word in Dictionary
⊣ 721 Accounts Merge
⊣ 726 Number of Atoms
⊣ 736 Parse Lisp Expression
⊣ 740 Delete and Earn
⊣ 745 Prefix and Suffix Search
⊣ 748 Shortest Completing Word
⊣ 752 Open the Lock
⊣ 756 Pyramid Transition Matrix
⊣ 763 Partition Labels
⊣ 767 Reorganize String
⊣ 770 Basic Calculator IV
⊣ 771 Jewels and Stones
⊣ 781 Rabbits in Forest
⊣ 791 Custom Sort String
⊣ 792 Number of Matching Subsequences
⊣ 804 Unique Morse Code Words
⊣ 805 Split Array With Same Average
⊣ 811 Subdomain Visit Count
⊣ 815 Bus Routes
⊣ 817 Linked List Components
⊣ 819 Most Common Word
⊣ 820 Short Encoding of Words
⊣ 822 Card Flipping Game
⊣ 823 Binary Trees With Factors
⊣ 828 Count Unique Characters of All Substrings of a Given String
⊣ 833 Find And Replace in String
⊣ 839 Similar String Groups
⊣ 840 Magic Squares In Grid
⊣ 846 Hand of Straights
⊣ 854 K-Similar Strings
⊣ 859 Buddy Strings
⊣ 863 All Nodes Distance K in Binary Tree
⊣ 865 Smallest Subtree with all the Deepest Nodes
⊣ 869 Reordered Power of 2
⊣ 873 Length of Longest Fibonacci Subsequence
⊣ 874 Walking Robot Simulation
⊣ 884 Uncommon Words from Two Sentences
⊣ 888 Fair Candy Swap
⊣ 889 Construct Binary Tree from Preorder and Postorder Traversal
⊣ 890 Find and Replace Pattern
⊣ 893 Groups of Special-Equivalent Strings
⊣ 895 Maximum Frequency Stack
⊣ 904 Fruit Into Baskets
⊣ 911 Online Election
⊣ 914 X of a Kind in a Deck of Cards
⊣ 916 Word Subsets
⊣ 923 3Sum With Multiplicity
⊣ 924 Minimize Malware Spread
⊣ 928 Minimize Malware Spread II
⊣ 929 Unique Email Addresses
⊣ 930 Binary Subarrays With Sum
⊣ 939 Minimum Area Rectangle
⊣ 947 Most Stones Removed with Same Row or Column
⊣ 952 Largest Component Size by Common Factor
⊣ 953 Verifying an Alien Dictionary
⊣ 954 Array of Doubled Pairs
⊣ 957 Prison Cells After N Days
⊣ 959 Regions Cut By Slashes
⊣ 961 N-Repeated Element in Size 2N Array
⊣ 963 Minimum Area Rectangle II
⊣ 966 Vowel Spellchecker
⊣ 970 Powerful Integers
⊣ 974 Subarray Sums Divisible by K
⊣ 981 Time Based Key-Value Store
⊣ 982 Triples with Bitwise AND Equal To Zero
⊣ 987 Vertical Order Traversal of a Binary Tree
⊣ 992 Subarrays with K Different Integers
⊣ 996 Number of Squareful Arrays
⊣ 997 Find the Town Judge
⊣ 1001 Grid Illumination
⊣ 1002 Find Common Characters
⊣ 1010 Pairs of Songs With Total Durations Divisible by 60
⊣ 1015 Smallest Integer Divisible by K
⊣ 1016 Binary String With Substrings Representing 1 To N
⊣ 1027 Longest Arithmetic Subsequence
⊣ 1036 Escape a Large Maze
⊣ 1048 Longest String Chain
⊣ 1054 Distant Barcodes
⊣ 1072 Flip Columns For Maximum Number of Equal Rows
⊣ 1074 Number of Submatrices That Sum to Target
⊣ 1079 Letter Tile Possibilities
⊣ 1090 Largest Values From Labels
⊣ 1096 Brace Expansion II
⊣ 1110 Delete Nodes And Return Forest
⊣ 1122 Relative Sort Array
⊣ 1123 Lowest Common Ancestor of Deepest Leaves
⊣ 1124 Longest Well-Performing Interval
⊣ 1128 Number of Equivalent Domino Pairs
⊣ 1138 Alphabet Board Path
⊣ 1146 Snapshot Array
⊣ 1156 Swap For Longest Repeated Character Substring
⊣ 1160 Find Words That Can Be Formed by Characters
⊣ 1169 Invalid Transactions
⊣ 1170 Compare Strings by Frequency of the Smallest Character
⊣ 1171 Remove Zero Sum Consecutive Nodes from Linked List
⊣ 1172 Dinner Plate Stacks
⊣ 1177 Can Make Palindrome from Substring
⊣ 1178 Number of Valid Words for Each Puzzle
⊣ 1189 Maximum Number of Balloons
⊣ 1202 Smallest String With Swaps
⊣ 1207 Unique Number of Occurrences
⊣ 1218 Longest Arithmetic Subsequence of Given Difference
⊣ 1224 Maximum Equal Frequency
⊣ 1248 Count Number of Nice Subarrays
⊣ 1255 Maximum Score Words Formed by Letters
⊣ 1261 Find Elements in a Contaminated Binary Tree
⊣ 1275 Find Winner on a Tic Tac Toe Game
⊣ 1282 Group the People Given the Group Size They Belong To
⊣ 1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix
⊣ 1296 Divide Array in Sets of K Consecutive Numbers
⊣ 1297 Maximum Number of Occurrences of a Substring
⊣ 1311 Get Watched Videos by Your Friends
⊣ 1331 Rank Transform of an Array
⊣ 1338 Reduce Array Size to The Half
⊣ 1345 Jump Game IV
⊣ 1346 Check If N and Its Double Exist
⊣ 1347 Minimum Number of Steps to Make Two Strings Anagram
⊣ 1348 Tweet Counts Per Frequency
⊣ 1357 Apply Discount Every n Orders
⊣ 1358 Number of Substrings Containing All Three Characters
⊣ 1365 How Many Numbers Are Smaller Than the Current Number
⊣ 1366 Rank Teams by Votes
⊣ 1370 Increasing Decreasing String
⊣ 1371 Find the Longest Substring Containing Vowels in Even Counts
⊣ 1386 Cinema Seat Allocation
⊣ 1394 Find Lucky Integer in an Array
⊣ 1396 Design Underground System
⊣ 1399 Count Largest Group
⊣ 1400 Construct K Palindrome Strings
⊣ 1410 HTML Entity Parser
⊣ 1418 Display Table of Food Orders in a Restaurant
⊣ 1436 Destination City
⊣ 1442 Count Triplets That Can Form Two Arrays of Equal XOR
⊣ 1443 Minimum Time to Collect All Apples in a Tree
⊣ 1452 People Whose List of Favorite Companies Is Not a Subset of Another List
⊣ 1460 Make Two Arrays Equal by Reversing Subarrays
⊣ 1461 Check If a String Contains All Binary Codes of Size K
⊣ 1477 Find Two Non-overlapping Sub-arrays Each With Target Sum
⊣ 1481 Least Number of Unique Integers after K Removals
⊣ 1487 Making File Names Unique
⊣ 1488 Avoid Flood in The City
⊣ 1496 Path Crossing
⊣ 1497 Check If Array Pairs Are Divisible by k
⊣ 1512 Number of Good Pairs
⊣ 1519 Number of Nodes in the Sub-Tree With the Same Label (PRO)
⊣ 1520 Maximum Number of Non-Overlapping Substrings
⊣ 1525 Number of Good Ways to Split a String
⊣ 1540 Can Convert String in K Moves
⊣ 1542 Find Longest Awesome Substring
⊣ 1546 Maximum Number of Non-Overlapping Subarrays With Sum Equals Target
⊣ 1562 Find Latest Group of Size M
⊣ 1577 Number of Ways Where Square of Number Is Equal to Product of Two Numbers
⊣ 1590 Make Sum Divisible by P (PRO)
⊣ 1593 Split a String Into the Max Number of Unique Substrings
⊣ 1600 Throne Inheritance
⊣ 1604 Alert Using Same Key-Card Three or More Times in a One Hour Period
⊣ 1624 Largest Substring Between Two Equal Characters
⊣ 1630 Arithmetic Subarrays
⊣ 1636 Sort Array by Increasing Frequency
⊣ 1638 Count Substrings That Differ by One Character (PRO)
⊣ 1640 Check Array Formation Through Concatenation
⊣ 1647 Minimum Deletions to Make Character Frequencies Unique
⊣ 1654 Minimum Jumps to Reach Home
⊣ 1655 Distribute Repeating Integers
⊣ 1656 Design an Ordered Stream
⊣ 1657 Determine if Two Strings Are Close
⊣ 1658 Minimum Operations to Reduce X to Zero
⊣ 1674 Minimum Moves to Make Array Complementary
⊣ 1679 Max Number of K-Sum Pairs
⊣ 1681 Minimum Incompatibility
⊣ 1684 Count the Number of Consistent Strings (PRO)
⊣ 1695 Maximum Erasure Value
⊣ 1711 Count Good Meals (PRO)
⊣ 1713 Minimum Operations to Make a Subsequence
⊣ 1719 Number Of Ways To Reconstruct A Tree
⊣ 1726 Tuple with Same Product
⊣ 1733 Minimum Number of People to Teach
⊣ 1737 Change Minimum Characters to Satisfy One of Three Conditions
⊣ 1742 Maximum Number of Balls in a Box
⊣ 1743 Restore the Array From Adjacent Pairs
⊣ 1748 Sum of Unique Elements (PRO)
⊣ 1763 Longest Nice Substring (PRO)
⊣ 1775 Equal Sum Arrays With Minimum Number of Operations
⊣ 1781 Sum of Beauty of All Substrings (PRO)
⊣ 1782 Count Pairs Of Nodes
⊣ 1787 Make the XOR of All Segments Equal to Zero
⊣ 1790 Check if One String Swap Can Make Strings Equal
⊣ 1796 Second Largest Digit in a String
⊣ 1797 Design Authentication Manager
⊣ 1805 Number of Different Integers in a String
⊣ 1807 Evaluate the Bracket Pairs of a String (PRO)
⊣ 1814 Count Nice Pairs in an Array (PRO)
⊣ 1817 Finding the Users Active Minutes (PRO)
⊣ 1830 Minimum Number of Operations to Make String Sorted
⊣ 1832 Check if the Sentence Is Pangram
⊣ 1857 Largest Color Value in a Directed Graph
⊣ 1865 Finding Pairs With a Certain Sum
⊣ 1876 Substrings of Size Three with Distinct Characters (PRO)
⊣ 1893 Check if All the Integers in a Range Are Covered
⊣ 1897 Redistribute Characters to Make All Strings Equal
⊣ 1912 Design Movie Rental System
⊣ 1915 Number of Wonderful Substrings
⊣ 1930 Unique Length-3 Palindromic Subsequences (PRO)
⊣ 1932 Merge BSTs to Create Single BST
⊣ 1935 Maximum Number of Words You Can Type (PRO)
⊣ 1938 Maximum Genetic Difference Query (PRO)
⊣ 1941 Check if All Characters Have Equal Number of Occurrences (PRO)
⊣ 1942 The Number of the Smallest Unoccupied Chair
⊣ 1943 Describe the Painting
⊣ 1948 Delete Duplicate Folders in System (PRO)
⊣ 1980 Find Unique Binary String
⊣ 1993 Operations on Tree
⊣ 1994 The Number of Good Subsets
⊣ 1995 Count Special Quadruplets (PRO)
⊣ 2001 Number of Pairs of Interchangeable Rectangles
⊣ 2006 Count Number of Pairs With Absolute Difference K
⊣ 2007 Find Original Array From Doubled Array
⊣ 2008 Maximum Earnings From Taxi
⊣ 2009 Minimum Number of Operations to Make Array Continuous
⊣ 2013 Detect Squares
⊣ 2014 Longest Subsequence Repeated k Times
⊣ 2019 The Score of Students Solving Math Expression
⊣ 2023 Number of Pairs of Strings With Concatenation Equal to Target
⊣ 2025 Maximum Number of Ways to Partition an Array
⊣ 2032 Two Out of Three
⊣ 2034 Stock Price Fluctuation
⊣ 2043 Simple Bank System
⊣ 2048 Next Greater Numerically Balanced Number
⊣ 2053 Kth Distinct String in an Array
⊣ 2062 Count Vowel Substrings of a String
⊣ 2068 Check Whether Two Strings are Almost Equivalent
⊣ 2080 Range Frequency Queries
⊣ 2085 Count Common Words With One Occurrence
⊣ 2094 Finding 3-Digit Even Numbers
⊣ 2099 Find Subsequence of Length K With the Largest Sum
⊣ 2103 Rings and Rods
⊣ 2115 Find All Possible Recipes from Given Supplies
⊣ 2121 Intervals Between Identical Elements
⊣ 2122 Recover the Original Array
⊣ 2131 Longest Palindrome by Concatenating Two Letter Words
⊣ 2133 Check if Every Row and Column Contains All Numbers
⊣ 2135 Count Words Obtained After Adding a Letter
⊣ 2150 Find All Lonely Numbers in the Array
⊣ 2154 Keep Multiplying Found Values by Two
⊣ 2157 Groups of Strings (PRO)
⊣ 2166 Design Bitset
⊣ 2170 Minimum Operations to Make the Array Alternating
⊣ 2182 Construct String With Repeat Limit
⊣ 2183 Count Array Pairs Divisible by K
⊣ 2186 Minimum Number of Steps to Make Two Strings Anagram II
⊣ 2190 Most Frequent Number Following Key In an Array
⊣ 2196 Create Binary Tree From Descriptions
⊣ 2201 Count Artifacts That Can Be Extracted
⊣ 2206 Divide Array Into Equal Pairs
⊣ 2215 Find the Difference of Two Arrays
⊣ 2225 Find Players With Zero or One Losses
⊣ 2227 Encrypt and Decrypt Strings
⊣ 2244 Minimum Rounds to Complete All Tasks
⊣ 2248 Intersection of Multiple Arrays
⊣ 2249 Count Lattice Points Inside a Circle
⊣ 2250 Count Number of Rectangles Containing Each Point
⊣ 2251 Number of Flowers in Full Bloom
⊣ 2260 Minimum Consecutive Cards to Pick Up
⊣ 2261 K Divisible Elements Subarrays (PRO)
⊣ 2262 Total Appeal of A String
⊣ 2266 Count Number of Texts
⊣ 2272 Substring With Largest Variance
⊣ 2273 Find Resultant Array After Removing Anagrams
⊣ 2275 Largest Combination With Bitwise AND Greater Than Zero
⊣ 2283 Check if Number Has Equal Digit Count and Digit Value
⊣ 2284 Sender With Largest Word Count
⊣ 2287 Rearrange Characters to Make Target String
⊣ 2295 Replace Elements in an Array
⊣ 2301 Match Substring After Replacement (PRO)
⊣ 2306 Naming a Company
⊣ 2309 Greatest English Letter in Upper and Lower Case
⊣ 2325 Decode the Message
⊣ 2336 Smallest Number in Infinite Set
⊣ 2341 Maximum Number of Pairs in Array
⊣ 2342 Max Sum of a Pair With Equal Sum of Digits
⊣ 2347 Best Poker Hand
⊣ 2349 Design a Number Container System
⊣ 2350 Shortest Impossible Sequence of Rolls
⊣ 2351 First Letter to Appear Twice
⊣ 2352 Equal Row and Column Pairs
⊣ 2353 Design a Food Rating System
⊣ 2354 Number of Excellent Pairs
⊣ 2357 Make Array Zero by Subtracting Equal Amounts
⊣ 2363 Merge Similar Items
⊣ 2364 Count Number of Bad Pairs
⊣ 2365 Task Scheduler II
⊣ 2367 Number of Arithmetic Triplets
⊣ 2368 Reachable Nodes With Restrictions
⊣ 2370 Longest Ideal Subsequence
⊣ 2374 Node With Highest Edge Score
⊣ 2384 Largest Palindromic Number
⊣ 2385 Amount of Time for Binary Tree to Be Infected
⊣ 2395 Find Subarrays With Equal Sum
⊣ 2399 Check Distances Between Same Letters
⊣ 2402 Meeting Rooms III
⊣ 2404 Most Frequent Even Element
⊣ 2405 Optimal Partition of String
⊣ 2418 Sort the People
⊣ 2421 Number of Good Paths
⊣ 2423 Remove Letter To Equalize Frequency
⊣ 2424 Longest Uploaded Prefix
⊣ 2434 Using a Robot to Print the Lexicographically Smallest String
⊣ 2441 Largest Positive Integer That Exists With Its Negative
⊣ 2442 Count Number of Distinct Integers After Reverse Operations
⊣ 2451 Odd String Difference
⊣ 2453 Destroy Sequential Targets
⊣ 2456 Most Popular Video Creator
⊣ 2461 Maximum Sum of Distinct Subarrays With Length K
⊣ 2465 Number of Distinct Averages
⊣ 2475 Number of Unequal Triplets in Array
⊣ 2488 Count Subarrays With Median K
⊣ 2491 Divide Players Into Teams of Equal Skill
⊣ 2499 Minimum Total Cost to Make Arrays Unequal
⊣ 2501 Longest Square Streak in an Array
⊣ 2502 Design Memory Allocator
⊣ 2506 Count Pairs Of Similar Strings
⊣ 2508 Add Edges to Make Degrees of All Nodes Even
⊣ 2512 Reward Top K Students
⊣ 2514 Count Anagrams
⊣ 2516 Take K of Each Character From Left and Right
⊣ 2521 Distinct Prime Factors of Product of Array
⊣ 2526 Find Consecutive Integers from a Data Stream
⊣ 2531 Make Number of Distinct Characters Equal (PRO)
⊣ 2537 Count the Number of Good Subarrays
⊣ 2540 Minimum Common Value
⊣ 2547 Minimum Cost to Split an Array
⊣ 2549 Count Distinct Numbers on Board
⊣ 2554 Maximum Number of Integers to Choose From a Range I
⊣ 2561 Rearranging Fruits
⊣ 2564 Substring XOR Queries (PRO)
⊣ 2570 Merge Two 2D Arrays by Summing Values
⊣ 2581 Count Number of Possible Root Nodes
⊣ 2584 Split the Array to Make Coprime Products
⊣ 2588 Count the Number of Beautiful Subarrays
⊣ 2593 Find Score of an Array After Marking All Elements
⊣ 2597 The Number of Beautiful Subsets
⊣ 2598 Smallest Missing Non-negative Integer After Operations (PRO)
⊣ 2605 Form Smallest Number From Two Digit Arrays
⊣ 2606 Find the Substring With Maximum Cost
⊣ 2610 Convert an Array Into a 2D Array With Conditions
⊣ 2612 Minimum Reverse Operations
⊣ 2615 Sum of Distances
⊣ 2641 Cousins in Binary Tree II
⊣ 2653 Sliding Subarray Beauty
⊣ 2657 Find the Prefix Common Array of Two Arrays
⊣ 2661 First Completely Painted Row or Column
⊣ 2670 Find the Distinct Difference Array
⊣ 2671 Frequency Tracker
⊣ 2682 Find the Losers of the Circular Game
⊣ 2707 Extra Characters in a String
⊣ 2711 Difference of Number of Distinct Values on Diagonals
⊣ 2713 Maximum Strictly Increasing Cells in a Matrix
⊣ 2716 Minimize String Length
⊣ 2718 Sum of Matrix After Queries
⊣ 2729 Check if The Number is Fascinating (PRO)
⊣ 2732 Find a Good Subset of the Matrix
⊣ 2744 Find Maximum Number of String Pairs
⊣ 2747 Count Zero Request Servers
⊣ 2748 Number of Beautiful Pairs
⊣ 2763 Sum of Imbalance Numbers of All Subarrays
⊣ 2766 Relocate Marbles
⊣ 2767 Partition String Into Minimum Beautiful Substrings
⊣ 2768 Number of Black Blocks
⊣ 2780 Minimum Index of a Valid Split
⊣ 2781 Length of the Longest Valid Substring
⊣ 2784 Check if Array is Good
⊣ 2799 Count Complete Subarrays in an Array
⊣ 2808 Minimum Seconds to Equalize a Circular Array
⊣ 2813 Maximum Elegance of a K-Length Subsequence
⊣ 2815 Max Pair Sum in an Array
⊣ 2830 Maximize the Profit as the Salesman
⊣ 2831 Find the Longest Equal Subarray
⊣ 2840 Check if Strings Can be Made Equal With Operations II
⊣ 2841 Maximum Sum of Almost Unique Subarray
⊣ 2842 Count K-Subsequences of a String With Maximum Beauty
⊣ 2845 Count of Interesting Subarrays
⊣ 2848 Points That Intersect With Cars
⊣ 2856 Minimum Array Length After Pair Removals
⊣ 2857 Count Pairs of Points With Distance k
⊣ 2869 Minimum Operations to Collect Elements
⊣ 2870 Minimum Number of Operations to Make Array Empty
⊣ 2875 Minimum Size Subarray in Infinite Array
⊣ 2897 Apply Operations on Array to Maximize Sum of Squares
⊣ 2902 Count of Sub-Multisets With Bounded Sum
⊣ 2910 Minimum Number of Groups to Create a Valid Assignment
⊣ 2913 Subarrays Distinct Element Sum of Squares I
⊣ 2932 Maximum Strong Pair XOR I
⊣ 2933 High-Access Employees
⊣ 2935 Maximum Strong Pair XOR II
⊣ 2947 Count Beautiful Substrings I
⊣ 2949 Count Beautiful Substrings II
⊣ 2953 Count Complete Substrings
⊣ 2956 Find Common Elements Between Two Arrays
⊣ 2958 Length of Longest Subarray With at Most K Frequency
⊣ 2963 Count the Number of Good Partitions
⊣ 2965 Find Missing and Repeated Values
⊣ 2975 Maximum Square Area by Removing Fences From a Field
⊣ 2981 Find Longest Special Substring That Occurs Thrice I
⊣ 2982 Find Longest Special Substring That Occurs Thrice II
⊣ 2983 Palindrome Rearrangement Queries
⊣ 2996 Smallest Missing Integer Greater Than Sequential Prefix Sum
⊣ 3002 Maximum Size of a Set After Removals
⊣ 3005 Count Elements With Maximum Frequency
⊣ 3013 Divide an Array Into Subarrays With Minimum Cost II
⊣ 3016 Minimum Number of Pushes to Type Word II
⊣ 3020 Find the Maximum Number of Elements in Subset
⊣ 3026 Maximum Good Subarray Sum
⊣ 3035 Maximum Palindromes After Operations
⊣ 3039 Apply Operations to Make String Empty
⊣ 3043 Find the Length of the Longest Common Prefix
⊣ 3044 Most Frequent Prime
⊣ 3046 Split the Array
⊣ 3071 Minimum Operations to Write the Letter Y on a Grid
⊣ 3076 Shortest Uncommon Substring in an Array
⊣ 3080 Mark Elements on Array by Performing Queries
⊣ 3081 Replace Question Marks in String to Minimize Its Value
⊣ 3083 Existence of a Substring in a String and Its Reverse
⊣ 3085 Minimum Deletions to Make String K-Special
⊣ 3090 Maximum Length Substring With Two Occurrences
⊣ 3092 Most Frequent IDs
⊣ 3120 Count the Number of Special Characters I
⊣ 3121 Count the Number of Special Characters II
⊣ 3128 Right Triangles
⊣ 3134 Find the Median of the Uniqueness Array
⊣ 3137 Minimum Number of Operations to Make Word K-Periodic
⊣ 3138 Minimum Length of Anagram Concatenation
⊣ 3143 Maximum Points Inside the Square
⊣ 3144 Minimum Substring Partition of Equal Character Frequency
⊣ 3146 Permutation Difference between Two Strings
⊣ 3153 Sum of Digit Differences of All Pairs
⊣ 3158 Find the XOR of Numbers Which Appear Twice
⊣ 3159 Find Occurrences of an Element in an Array
⊣ 3160 Find the Number of Distinct Colors Among the Balls
⊣ 3162 Find the Number of Good Pairs I
⊣ 3164 Find the Number of Good Pairs II
⊣ 3170 Lexicographically Minimum String After Removing Stars
⊣ 3176 Find the Maximum Length of a Good Subsequence I
⊣ 3177 Find the Maximum Length of a Good Subsequence II
⊣ 3184 Count Pairs That Form a Complete Day I
⊣ 3185 Count Pairs That Form a Complete Day II
⊣ 3186 Maximum Total Damage With Spell Casting
⊣ 3217 Delete Nodes From Linked List Present in Array (PRO)
⊣ 3223 Minimum Length of String After Operations
⊣ 3224 Minimum Array Changes to Make Differences Equal
⊣ 3238 Find the Number of Winning Players
⊣ 3242 Design Neighbor Sum Service
⊣ 3265 Count Almost Equal Pairs I
⊣ 3267 Count Almost Equal Pairs II
⊣ 3272 Find the Count of Good Integers
⊣ 3289 The Two Sneaky Numbers of Digitville
⊣ 3295 Report Spam Message
⊣ 3297 Count Substrings That Can Be Rearranged to Contain a String I
⊣ 3298 Count Substrings That Can Be Rearranged to Contain a String II
⊣ 3305 Count of Substrings Containing Every Vowel and K Consonants I
⊣ 3306 Count of Substrings Containing Every Vowel and K Consonants II
⊣ 3311 Construct 2D Grid Matching Graph Layout
⊣ 3312 Sorted GCD Pair Queries (PRO)
⊣ 3316 Find Maximum Removals From Source String
⊣ 3318 Find X-Sum of All K-Long Subarrays I
⊣ 3321 Find X-Sum of All K-Long Subarrays II
⊣ 3325 Count Substrings With K-Frequency Characters I
⊣ 3327 Check if DFS Strings Are Palindromes
⊣ 3331 Find Subtree Sizes After Changes
⊣ 3335 Total Characters in String After Transformations I
⊣ 3337 Total Characters in String After Transformations II
⊣ 3351 Sum of Good Subsequences
⊣ 3365 Rearrange K Substrings to Form Target String
⊣ 3371 Identify the Largest Outlier in an Array
⊣ 3375 Minimum Operations to Make Array Values Equal to K
⊣ 3378 Count Connected Components in LCM Graph
⊣ 3381 Maximum Subarray Sum With Length Divisible by K
⊣ 3389 Minimum Operations to Make Character Frequencies Equal
⊣ 3395 Subsequences with a Unique Middle Mode I
⊣ 3396 Minimum Number of Operations to Make Elements in Array Distinct
⊣ 3404 Count Special Subsequences
⊣ 3408 Design Task Manager
⊣ 3412 Find Mirror Score of a String
⊣ 3425 Longest Special Path
⊣ 3434 Maximum Frequency After Subarray Operation
⊣ 3438 Find Valid Pair of Adjacent Digits in String
⊣ 3442 Maximum Difference Between Even and Odd Frequency I (PRO)
⊣ 3443 Maximum Manhattan Distance After K Changes (PRO)
⊣ 3447 Assign Elements to Groups with Constraints
⊣ 3458 Select K Disjoint Special Substrings
⊣ 3471 Find the Largest Almost Missing Integer
⊣ 3483 Unique 3-Digit Even Numbers
⊣ 3484 Design Spreadsheet
⊣ 3486 Longest Special Path II
⊣ 3487 Maximum Unique Subarray Sum After Deletion
⊣ 3488 Closest Equal Element Queries
⊣ 3493 Properties Graph
⊣ 3505 Minimum Operations to Make Elements Within K Subarrays Equal
⊣ 3507 Minimum Pair Removal to Sort Array I
⊣ 3508 Implement Router
⊣ 3509 Maximum Product of Subsequences With an Alternating Sum Equal to K
⊣ 3510 Minimum Pair Removal to Sort Array II
⊣ 3518 Smallest Palindromic Rearrangement II
⊣ 3522 Calculate Score After Performing Instructions
⊣ 3527 Find the Most Common Response
⊣ 3531 Count Covered Buildings
⊣ 3532 Path Existence Queries in a Graph I
⊣ 3541 Find Most Frequent Vowel and Consonant
⊣ 3542 Minimum Operations to Convert All Elements to Zero
⊣ 3543 Maximum Weighted K-Edge Path
⊣ 3545 Minimum Deletions for At Most K Distinct Characters
⊣ 3548 Equal Sum Grid Partition II
⊣ 3551 Minimum Swaps to Sort by Digit Sum
⊣ 3552 Grid Teleportation Traversal
⊣ 3556 Sum of Largest Prime Substrings
⊣ 3557 Find Maximum Number of Non Intersecting Substrings
⊣ 3568 Minimum Moves to Clean the Classroom
⊣ 3572 Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values
⊣ 3583 Count Special Triplets
⊣ 3588 Find Maximum Area of a Triangle
⊣ 3591 Check if Any Element Has Prime Frequency
⊣ 3597 Partition String
⊣ 3606 Coupon Code Validator (PRO)
⊣ 3607 Power Grid Maintenance
⊣ 3623 Count Number of Trapezoids I
⊣ 3625 Count Number of Trapezoids II
⊣ 3629 Minimum Jumps to Reach End via Prime Teleportation
⊣ 3636 Threshold Majority Queries
⊣ 3654 Minimum Sum After Divisible Sum Deletions
⊣ 3659 Partition Array Into K-Distinct Groups
⊣ 3663 Find The Least Frequent Digit
⊣ 3664 Two-Letter Card Game
⊣ 3668 Restore Finishing Order
⊣ 3678 Smallest Absent Positive Greater Than Average
⊣ 3679 Minimum Discards to Balance Inventory
⊣ 3684 Maximize Sum of At Most K Distinct Elements
⊣ 3690 Split and Merge Array Transformation
⊣ 3692 Majority Frequency Characters
⊣ 3694 Distinct Points Reachable After Substring Removal
⊣ 3712 Sum of Elements With Frequency Divisible by K
⊣ 3713 Longest Balanced Substring I
⊣ 3714 Longest Balanced Substring II
⊣ 3715 Sum of Perfect Square Ancestors
⊣ 3718 Smallest Missing Multiple of K
⊣ 3719 Longest Balanced Subarray I
⊣ 3720 Lexicographically Smallest Permutation Greater Than Target
⊣ 3721 Longest Balanced Subarray II
⊣ 3728 Stable Subarrays With Equal Boundary and Interior Sum
⊣ 3729 Count Distinct Subarrays Divisible by K in Sorted Array
⊣ 3731 Find Missing Elements
⊣ 3737 Count Subarrays With Majority Element I
⊣ 3739 Count Subarrays With Majority Element II
⊣ 3740 Minimum Distance Between Three Equal Elements I
⊣ 3741 Minimum Distance Between Three Equal Elements II
⊣ 3755 Find Maximum Balanced XOR Subarray Length
⊣ 3760 Maximum Substrings With Distinct Start
⊣ 3761 Minimum Absolute Distance Between Mirror Pairs
⊣ 3779 Minimum Number of Operations to Have Distinct Elements
⊣ 3784 Minimum Deletion Cost to Make All Characters Equal
⊣ 3785 Minimum Swaps to Avoid Forbidden Values
⊣ 3790 Smallest All-Ones Multiple
⊣ 3795 Minimum Subarray Length With Distinct Sum At Least K
⊣ 3803 Count Residue Prefixes
⊣ 3804 Number of Centered Subarrays
⊣ 3805 Count Caesar Cipher Pairs
⊣ 3810 Minimum Operations to Reach Target Array
⊣ 3811 Number of Alternating XOR Partitions
⊣ 3815 Design Auction System
⊣ 3816 Lexicographically Smallest String After Deleting Duplicate Characters
⊣ 3829 Design Ride Sharing System
⊣ 3839 Number of Prefix Connected Groups
⊣ 3842 Toggle Light Bulbs
⊣ 3843 First Element with Unique Frequency