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HomeLeetCode ProblemsTwo Pointers

Two Pointers Problems

182 Two Pointers LeetCode problems · Solve with AI-powered hints & step-by-step explanations.

5Longest Palindromic SubstringMedium11Container With Most WaterMedium153SumMedium163Sum ClosestMedium184SumMedium19Remove Nth Node From End of ListMedium26Remove Duplicates from Sorted ArrayEasy27Remove ElementEasy28Find the Index of the First Occurrence in a StringEasy31Next PermutationMedium42Trapping Rain WaterHard61Rotate ListMedium75Sort ColorsMedium80Remove Duplicates from Sorted Array IIMedium82Remove Duplicates from Sorted List IIMedium86Partition ListMedium88Merge Sorted ArrayEasy125Valid PalindromeEasy141Linked List CycleEasy142Linked List Cycle IIMedium143Reorder ListMedium148Sort ListMedium151Reverse Words in a StringMedium160Intersection of Two Linked ListsEasy165Compare Version NumbersMedium167Two Sum II - Input Array Is SortedMedium189Rotate ArrayMedium202Happy NumberEasy234Palindrome Linked ListEasy283Move ZeroesEasy287Find the Duplicate NumberMedium295Find Median from Data StreamHard321Create Maximum NumberHard344Reverse StringEasy345Reverse Vowels of a StringEasy349Intersection of Two ArraysEasy350Intersection of Two Arrays IIEasy392Is SubsequenceEasy443String CompressionMedium455Assign CookiesEasy457Circular Array LoopMedium475HeatersMedium481Magical StringMedium522Longest Uncommon Subsequence IIMedium524Longest Word in Dictionary through DeletingMedium532K-diff Pairs in an ArrayMedium541Reverse String IIEasy556Next Greater Element IIIMedium557Reverse Words in a String IIIEasy567Permutation in StringMedium581Shortest Unsorted Continuous SubarrayMedium611Valid Triangle NumberMedium633Sum of Square NumbersMedium647Palindromic SubstringsMedium653Two Sum IV - Input is a BSTEasy658Find K Closest ElementsMedium680Valid Palindrome IIEasy696Count Binary SubstringsEasy719Find K-th Smallest Pair DistanceHard763Partition LabelsMedium777Swap Adjacent in LR StringMedium786K-th Smallest Prime FractionMedium795Number of Subarrays with Bounded MaximumMedium809Expressive WordsMedium821Shortest Distance to a CharacterEasy825Friends Of Appropriate AgesMedium826Most Profit Assigning WorkMedium832Flipping an ImageEasy838Push DominoesMedium844Backspace String CompareEasy845Longest Mountain in ArrayMedium870Advantage ShuffleMedium876Middle of the Linked ListEasy881Boats to Save PeopleMedium905Sort Array By ParityEasy917Reverse Only LettersEasy922Sort Array By Parity IIEasy9233Sum With MultiplicityMedium925Long Pressed NameEasy942DI String MatchEasy948Bag of TokensMedium962Maximum Width RampMedium969Pancake SortingMedium977Squares of a Sorted ArrayEasy986Interval List IntersectionsMedium1023Camelcase MatchingMedium1048Longest String ChainMedium1089Duplicate ZerosEasy1147Longest Chunked Palindrome DecompositionHard1163Last Substring in Lexicographical OrderHard1237Find Positive Integer Solution for a Given EquationMedium1332Remove Palindromic SubsequencesEasy1346Check If N and Its Double ExistEasy1385Find the Distance Value Between Two ArraysEasy1455Check If a Word Occurs As a Prefix of Any Word in a SentenceEasy1471The k Strongest Values in an ArrayMedium1498Number of Subsequences That Satisfy the Given Sum ConditionMedium1508Range Sum of Sorted Subarray SumsMedium1537Get the Maximum ScoreHard1574Shortest Subarray to be Removed to Make Array SortedMedium1577Number of Ways Where Square of Number Is Equal to Product of Two NumbersMedium1616Split Two Strings to Make PalindromeMedium1679Max Number of K-Sum PairsMedium1697Checking Existence of Edge Length Limited PathsHard1712Ways to Split Array Into Three SubarraysMedium1721Swapping Nodes in a Linked ListMedium1750Minimum Length of String After Deleting Similar EndsMedium1754Largest Merge Of Two StringsMedium1755Closest Subsequence SumHard1764Form Array by Concatenating Subarrays of Another ArrayMedium1768Merge Strings AlternatelyEasy1782Count Pairs Of NodesHard1793Maximum Score of a Good SubarrayHard1813Sentence Similarity IIIMedium1850Minimum Adjacent Swaps to Reach the Kth Smallest NumberMedium1855Maximum Distance Between a Pair of ValuesMedium1861Rotating the BoxMedium1877Minimize Maximum Pair Sum in ArrayMedium1898Maximum Number of Removable CharactersMedium1961Check If String Is a Prefix of ArrayEasy1963Minimum Number of Swaps to Make the String BalancedMedium2000Reverse Prefix of WordEasy2035Partition Array Into Two Arrays to Minimize Sum DifferenceHard2071Maximum Number of Tasks You Can AssignHard2095Delete the Middle Node of a Linked ListMedium2105Watering Plants IIMedium2108Find First Palindromic String in the ArrayEasy2109Adding Spaces to a StringMedium2122Recover the Original ArrayHard2130Maximum Twin Sum of a Linked ListMedium2149Rearrange Array Elements by SignMedium2161Partition Array According to Given PivotMedium2193Minimum Number of Moves to Make PalindromeHard2200Find All K-Distant Indices in an ArrayEasy2234Maximum Total Beauty of the GardensHard2300Successful Pairs of Spells and PotionsMedium2332The Latest Time to Catch a BusMedium2337Move Pieces to Obtain a StringMedium2367Number of Arithmetic TripletsEasy2396Strictly Palindromic NumberMedium2406Divide Intervals Into Minimum Number of GroupsMedium2410Maximum Matching of Players With TrainersMedium2441Largest Positive Integer That Exists With Its NegativeEasy2460Apply Operations to an ArrayEasy2462Total Cost to Hire K WorkersMedium2465Number of Distinct AveragesEasy2472Maximum Number of Non-overlapping Palindrome SubstringsHard2486Append Characters to String to Make SubsequenceMedium2491Divide Players Into Teams of Equal SkillMedium2503Maximum Number of Points From Grid QueriesHard2511Maximum Enemy Forts That Can Be CapturedEasy2540Minimum Common ValueEasy2562Find the Array Concatenation ValueEasy2563Count the Number of Fair PairsMedium2565Subsequence With the Minimum ScoreHard2570Merge Two 2D Arrays by Summing ValuesEasy2576Find the Maximum Number of Marked IndicesMedium2592Maximize Greatness of an ArrayMedium2697Lexicographically Smallest PalindromeEasy2824Count Pairs Whose Sum is Less than TargetEasy2825Make String a Subsequence Using Cyclic IncrementsMedium2856Minimum Array Length After Pair RemovalsMedium2903Find Indices With Index and Value Difference IEasy2905Find Indices With Index and Value Difference IIMedium2911Minimum Changes to Make K Semi-palindromesHard2938Separate Black and White BallsMedium2970Count the Number of Incremovable Subarrays IEasy2972Count the Number of Incremovable Subarrays IIHard3006Find Beautiful Indices in the Given Array IMedium3008Find Beautiful Indices in the Given Array IIHard3132Find the Integer Added to Array IIMedium3186Maximum Total Damage With Spell CastingMedium3194Minimum Average of Smallest and Largest ElementsEasy3239Minimum Number of Flips to Make Binary Grid Palindromic IMedium3240Minimum Number of Flips to Make Binary Grid Palindromic IIMedium3302Find the Lexicographically Smallest Valid SequenceMedium3316Find Maximum Removals From Source StringMedium3403Find the Lexicographically Largest String From the Box IMedium3455Shortest Matching SubstringHard3503Longest Palindrome After Substring Concatenation IMedium3504Longest Palindrome After Substring Concatenation IIHard3584Maximum Product of First and Last Elements of a SubsequenceMedium
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