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Pattern147 DSA SheetSolve

1User input and outputFoundationsLanguage basicsEasyGFGGFG

2Data typesFoundationsLanguage basicsEasyGFGGFG

3If-else statementsFoundationsLanguage basicsEasyGFGGFG

4Switch statementsFoundationsLanguage basicsEasyGFGGFG

5Square of starsFoundationsLoops through pattern printingEasySolve

6Right triangle of starsFoundationsLoops through pattern printingEasySolve

7Right triangle of numbersFoundationsLoops through pattern printingEasySolve

8Triangle of repeated numbersFoundationsLoops through pattern printingEasySolve

9Inverted right triangle of starsFoundationsLoops through pattern printingEasySolve

10Inverted right triangle of numbersFoundationsLoops through pattern printingEasySolve

11Star pyramidFoundationsLoops through pattern printingEasySolve

12Inverted star pyramidFoundationsLoops through pattern printingEasySolve

13Star diamondFoundationsLoops through pattern printingEasySolve

14Half diamondFoundationsLoops through pattern printingEasySolve

15Triangle of alternating 1s and 0sFoundationsLoops through pattern printingEasySolve

16Number crownFoundationsLoops through pattern printingEasySolve

17Increasing number triangleFoundationsLoops through pattern printingEasySolve

18Increasing letter triangleFoundationsLoops through pattern printingEasySolve

19Reverse letter triangleFoundationsLoops through pattern printingEasySolve

20Letter rampFoundationsLoops through pattern printingEasySolve

21Letter pyramidFoundationsLoops through pattern printingEasySolve

22Letter triangle from the endFoundationsLoops through pattern printingEasySolve

23Symmetric voidFoundationsLoops through pattern printingMediumSolve

24Symmetric butterflyFoundationsLoops through pattern printingMediumSolve

25Hollow squareFoundationsLoops through pattern printingMediumSolve

26Concentric number squaresFoundationsLoops through pattern printingMediumSolve

27Count the digits of a numberFoundationsWorking with digits and divisorsEasySolve

28Count the odd digits of a numberFoundationsWorking with digits and divisorsEasySolve

29Largest digit of a numberFoundationsWorking with digits and divisorsEasySolve

30Palindrome NumberFoundationsWorking with digits and divisorsEasySolve

31Armstrong NumberFoundationsWorking with digits and divisorsEasySolve

32Perfect NumberFoundationsWorking with digits and divisorsEasySolve

33All divisors of a numberFoundationsWorking with digits and divisorsMediumSolve

34Check whether a number is primeFoundationsWorking with digits and divisorsMediumSolve

35GCD of two numbersFoundationsWorking with digits and divisorsMediumSolve

36LCM of two numbersFoundationsWorking with digits and divisorsMediumSolve

37Print something N times with recursionFoundationsRecursion basicsEasyGFGGFG

38Sum of the first N numbersFoundationsRecursion basicsEasySolve

39Factorial of NFoundationsRecursion basicsEasySolve

40Sum of the digits of a numberFoundationsRecursion basicsEasySolve

41Fibonacci NumberFoundationsRecursion basics147 DSA SheetEasySolve

42Count the frequency of each elementFoundationsCounting with arrays and mapsEasySolve

43Most frequent elementFoundationsCounting with arrays and mapsMediumSolve

44Second most frequent elementFoundationsCounting with arrays and mapsMediumSolve

45Sum of the highest and lowest frequencyFoundationsCounting with arrays and mapsMediumSolve

46Linear searchArrays and HashingArray basicsEasySolve

47Largest elementArrays and HashingArray basicsEasySolve

48Second largest elementArrays and HashingArray basicsEasySolve

49Sum of array elementsArrays and HashingArray basicsEasySolve

50Count the odd numbers in an arrayArrays and HashingArray basicsEasySolve

51Reverse an arrayArrays and HashingArray basicsEasySolve

52Check whether an array is sortedArrays and HashingArray basicsEasySolve

53Max Consecutive OnesArrays and HashingArray basicsEasySolve

54Find All Numbers Disappeared in an ArrayArrays and HashingArray basicsEasySolve

55Left rotate an array by oneArrays and HashingArray basicsEasySolve

56Rotate ArrayArrays and HashingArray basicsMediumSolve

57Leaders in an arrayArrays and HashingArray basicsMediumSolve

58Two SumArrays and HashingHash map lookups147 DSA SheetEasySolve

59Contains DuplicateArrays and HashingHash map lookups147 DSA SheetEasySolve

60Valid AnagramArrays and HashingHash map lookups147 DSA SheetEasySolve

61Group AnagramsArrays and HashingHash map lookups147 DSA SheetMediumSolve

62Longest Consecutive SequenceArrays and HashingHash map lookups147 DSA SheetMediumSolve

63Valid SudokuArrays and HashingHash map lookupsMediumSolve

64Encode and Decode StringsArrays and HashingHash map lookupsMediumSolve

65First Unique Character in a StringArrays and HashingHash map lookupsEasySolve

66First Missing PositiveArrays and HashingHash map lookupsHardSolve

67Top K Frequent ElementsArrays and HashingCounting and voting147 DSA SheetMediumSolve

68Majority ElementArrays and HashingCounting and voting147 DSA SheetEasySolve

69Majority Element IIArrays and HashingCounting and votingMediumSolve

94Detect SquaresArrays and HashingCounting and votingMediumSolve

70Best Time to Buy and Sell StockArrays and HashingOne pass with running state147 DSA SheetEasySolve

71Maximum SubarrayArrays and HashingOne pass with running state147 DSA SheetMediumSolve

72Maximum Product SubarrayArrays and HashingOne pass with running state147 DSA SheetMediumSolve

73Product of Array Except SelfArrays and HashingPrefix sums147 DSA SheetMediumSolve

74Subarray Sum Equals KArrays and HashingPrefix sums147 DSA SheetMediumSolve

75Maximum Size Subarray Sum Equals kArrays and HashingPrefix sumsMediumSolve

76Range Sum Query - ImmutableArrays and HashingPrefix sumsEasySolve

77Range Sum Query 2D - ImmutableArrays and HashingPrefix sumsMediumSolve

78Contiguous ArrayArrays and HashingPrefix sumsMediumSolve

79Subarray Sums Divisible by KArrays and HashingPrefix sumsMediumSolve

80Continuous Subarray SumArrays and HashingPrefix sumsMediumSolve

81Longest subarray with sum 0Arrays and HashingPrefix sumsMediumSolve

82Count subarrays with given xor KArrays and HashingPrefix sumsMediumSolve

83Spiral MatrixArrays and HashingWalking a matrix147 DSA SheetMediumSolve

84Rotate ImageArrays and HashingWalking a matrixMediumSolve

85Set Matrix ZeroesArrays and HashingWalking a matrixMediumSolve

86Reverse PairsArrays and HashingCounting during merge sortHardSolve

87Count InversionsArrays and HashingCounting during merge sortMediumSolve

88Plus OneMathNumber tricks147 DSA SheetEasySolve

89Happy NumberMathNumber tricksEasySolve

90Pow(x, n)MathNumber tricks147 DSA SheetMediumSolve

91Reverse IntegerMathNumber tricksMediumSolve

92Multiply StringsMathNumber tricksMediumSolve

93Count PrimesMathNumber tricksMediumSolve

95Ugly NumberMathNumber tricksEasySolve

96Nim GameMathNumber tricksEasySolve

97Count primes in a rangeMathPrimes and the sieveHardSolve

98Prime factorisationMathPrimes and the sieveMediumSolve

99Count Good NumbersMathFast power and modular arithmeticMediumSolve

100Pascal's TriangleMathPascal's triangle and combinationsEasySolve

101Pascal's Triangle IIMathPascal's triangle and combinationsEasySolve

102Pascal's triangle: a single valueMathPascal's triangle and combinationsMediumSolve

103Is the i-th bit setBit ManipulationBit basicsEasySolve

104Is a number odd, with bitsBit ManipulationBit basicsEasySolve

105Power of TwoBit ManipulationBit basicsEasySolve

106Set the rightmost unset bitBit ManipulationBit basicsEasySolve

107Swap two numbers without a third variableBit ManipulationBit basicsEasySolve

108Hamming DistanceBit ManipulationBit basicsEasySolve

109Minimum Bit Flips to Convert NumberBit ManipulationBit basicsEasySolve

110Single NumberBit ManipulationXOR tricks147 DSA SheetEasySolve

111Missing NumberBit ManipulationXOR tricks147 DSA SheetEasySolve

112Single Number IIBit ManipulationXOR tricksMediumSolve

113Single Number IIIBit ManipulationXOR tricksMediumSolve

114Set MismatchBit ManipulationXOR tricksEasySolve

115XOR of all numbers in a rangeBit ManipulationXOR tricksMediumSolve

116Number of 1 BitsBit ManipulationCounting and shifting bits147 DSA SheetEasySolve

117Counting BitsBit ManipulationCounting and shifting bits147 DSA SheetEasySolve

118Reverse BitsBit ManipulationCounting and shifting bits147 DSA SheetEasySolve

119Sum of Two IntegersBit ManipulationCounting and shifting bitsMediumSolve

120Divide Two IntegersBit ManipulationCounting and shifting bitsMediumSolve

121Bitwise AND of Numbers RangeBit ManipulationCounting and shifting bitsMediumSolve

122All subsets with a bitmaskBit ManipulationBitmasksMediumSolve

123Reverse StringStringsString basicsEasySolve

124Valid Palindrome IIStringsString basicsEasySolve

125Largest Odd Number in StringStringsString basicsEasySolve

126Longest Common PrefixStringsString basics147 DSA SheetEasySolve

127Isomorphic StringsStringsString basicsEasySolve

128Rotate StringStringsString basicsEasySolve

129Longest PalindromeStringsString basicsEasySolve

130Reverse Words in a StringStringsString basicsMediumSolve

131String CompressionStringsString basicsMediumSolve

132Count and SayStringsString basicsMediumSolve

133Remove Outermost ParenthesesStringsParentheses and nestingEasySolve

134Maximum Nesting Depth of the ParenthesesStringsParentheses and nestingEasySolve

135Minimum Add to Make Parentheses ValidStringsParentheses and nestingMediumSolve

136Minimum bracket reversals to balance an expressionStringsParentheses and nestingMediumSolve

137Roman to IntegerStringsParsing and conversionEasySolve

138String to Integer (atoi)StringsParsing and conversionMediumSolve

139Implement atoi with recursionStringsParsing and conversionMediumSolve

140Sort Characters By FrequencyStringsCounting over substringsMediumSolve

141Sum of Beauty of All SubstringsStringsCounting over substringsMediumSolve

142Count substrings with exactly K distinct charactersStringsCounting over substringsMediumSolve

143Selection sortSortingSimple sortsMediumSolve

144Bubble sortSortingSimple sortsMediumSolve

145Insertion sortSortingSimple sortsMediumSolve

146Bubble sort with recursionSortingSimple sortsMediumSolve

147Insertion sort with recursionSortingSimple sortsMediumSolve

148Merge sortSortingDivide-and-conquer sortsMediumSolve

149Quick sortSortingDivide-and-conquer sortsMediumSolve

150Sort an ArraySortingDivide-and-conquer sorts147 DSA SheetMediumSolve

151Largest NumberSortingDivide-and-conquer sortsMediumSolve

152Valid PalindromeTwo PointersPointers from both ends147 DSA SheetEasySolve

153Two Sum II - Input Array Is SortedTwo PointersPointers from both ends147 DSA SheetMediumSolve

1543SumTwo PointersPointers from both ends147 DSA SheetMediumSolve

155Container With Most WaterTwo PointersPointers from both ends147 DSA SheetMediumSolve

1564SumTwo PointersPointers from both endsMediumSolve

157Trapping Rain WaterTwo PointersPointers from both ends147 DSA SheetHardSolve

158Squares of a Sorted ArrayTwo PointersPointers from both endsEasySolve

1593Sum ClosestTwo PointersPointers from both endsMediumSolve

160Boats to Save PeopleTwo PointersPointers from both endsMediumSolve

161Sort ColorsTwo PointersRearranging in place147 DSA SheetMediumSolve

162Next PermutationTwo PointersRearranging in place147 DSA SheetMediumSolve

163Move ZeroesTwo PointersRearranging in placeEasySolve

164Remove Duplicates from Sorted ArrayTwo PointersRearranging in placeEasySolve

165Rearrange Array Elements by SignTwo PointersRearranging in placeMediumSolve

166Union of two sorted arraysTwo PointersMerging sorted arraysMediumSolve

167Intersection of two sorted arraysTwo PointersMerging sorted arraysMediumSolve

168Merge Sorted ArrayTwo PointersMerging sorted arraysEasyLeetCodeLC

169Merge two sorted arrays without extra spaceTwo PointersMerging sorted arraysHardGFGGFG

170Longest Substring Without Repeating CharactersSliding WindowLongest or shortest window147 DSA SheetMediumSolve

171Max Consecutive Ones IIISliding WindowLongest or shortest window147 DSA SheetMediumSolve

172Longest Repeating Character ReplacementSliding WindowLongest or shortest window147 DSA SheetMediumSolve

173Longest Substring with At Most K Distinct CharactersSliding WindowLongest or shortest windowMediumLeetCodeLC

174Minimum Window SubstringSliding WindowLongest or shortest window147 DSA SheetHardSolve

175Minimum Size Subarray SumSliding WindowLongest or shortest windowMediumLeetCodeLC

176Fruit Into BasketsSliding WindowLongest or shortest windowMediumLeetCodeLC

177Minimum Window SubsequenceSliding WindowLongest or shortest windowHardLeetCodeLC

178Permutation in StringSliding WindowFixed-size window147 DSA SheetMediumSolve

179Maximum Points You Can Obtain from CardsSliding WindowFixed-size window147 DSA SheetMediumSolve

180Maximum Average Subarray ISliding WindowFixed-size windowEasyLeetCodeLC

181Find All Anagrams in a StringSliding WindowFixed-size windowMediumLeetCodeLC

182Binary Subarrays With SumSliding WindowCounting windows147 DSA SheetMediumSolve

183Count Number of Nice SubarraysSliding WindowCounting windowsMediumLeetCodeLC

184Number of Substrings Containing All Three CharactersSliding WindowCounting windowsMediumLeetCodeLC

185Subarrays with K Different IntegersSliding WindowCounting windowsHardLeetCodeLC

186Implement a stack with an arrayStacks and QueuesBuilding stacks and queuesMediumGFGGFG

187Implement a queue with an arrayStacks and QueuesBuilding stacks and queuesMediumGFGGFG

188Implement a stack with a linked listStacks and QueuesBuilding stacks and queuesMediumGFGGFG

189Implement a queue with a linked listStacks and QueuesBuilding stacks and queuesMediumGFGGFG

190Implement Stack using QueuesStacks and QueuesBuilding stacks and queuesEasyLeetCodeLC

191Implement Queue using StacksStacks and QueuesBuilding stacks and queuesEasyLeetCodeLC

192Design Circular QueueStacks and QueuesBuilding stacks and queuesMediumLeetCodeLC

193Design Circular DequeStacks and QueuesBuilding stacks and queuesMediumLeetCodeLC

194Valid ParenthesesStacks and QueuesMatching and cancelling147 DSA SheetEasySolve

195Min StackStacks and QueuesMatching and cancelling147 DSA SheetMediumSolve

196Evaluate Reverse Polish NotationStacks and QueuesMatching and cancelling147 DSA SheetMediumSolve

197Asteroid CollisionStacks and QueuesMatching and cancellingMediumLeetCodeLC

198Find the CelebrityStacks and QueuesMatching and cancellingMediumLeetCodeLC

199Baseball GameStacks and QueuesMatching and cancellingEasyLeetCodeLC

200Backspace String CompareStacks and QueuesMatching and cancellingEasyLeetCodeLC

201Simplify PathStacks and QueuesMatching and cancellingMediumLeetCodeLC

202Decode StringStacks and QueuesMatching and cancellingMediumLeetCodeLC

203Basic Calculator IIStacks and QueuesMatching and cancellingMediumLeetCodeLC

204Infix to postfixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

205Infix to prefixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

206Postfix to infixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

207Prefix to infixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

208Prefix to postfixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

209Postfix to prefixStacks and QueuesInfix, prefix and postfixMediumGFGGFG

210Next Greater Element IStacks and QueuesMonotonic stack147 DSA SheetEasySolve

211Daily TemperaturesStacks and QueuesMonotonic stack147 DSA SheetMediumSolve

212Next Greater Element IIStacks and QueuesMonotonic stackMediumLeetCodeLC

213Online Stock SpanStacks and QueuesMonotonic stackMediumLeetCodeLC

214Car FleetStacks and QueuesMonotonic stack147 DSA SheetMediumSolve

215Remove K DigitsStacks and QueuesMonotonic stackMediumLeetCodeLC

216Sum of Subarray MinimumsStacks and QueuesMonotonic stackMediumLeetCodeLC

217Sum of Subarray RangesStacks and QueuesMonotonic stackMediumLeetCodeLC

218Largest Rectangle in HistogramStacks and QueuesMonotonic stack147 DSA SheetHardSolve

219Maximal RectangleStacks and QueuesMonotonic stackHardLeetCodeLC

220Next smaller elementStacks and QueuesMonotonic stackMediumGFGGFG

221Number of greater elements to the rightStacks and QueuesMonotonic stackMediumGFGGFG

222132 PatternStacks and QueuesMonotonic stackMediumLeetCodeLC

223Sliding Window MaximumStacks and QueuesMonotonic queue147 DSA SheetHardSolve

224Sliding Window MedianStacks and QueuesMonotonic queueHardLeetCodeLC

225Lower boundBinary SearchLower and upper boundsMediumGFGGFG

226Upper boundBinary SearchLower and upper boundsMediumGFGGFG

227Search Insert PositionBinary SearchLower and upper boundsEasyLeetCodeLC

228Floor and ceil in a sorted arrayBinary SearchLower and upper boundsMediumComing soonSoon

229Find First and Last Position of Element in Sorted ArrayBinary SearchLower and upper boundsMediumLeetCodeLC

230Count occurrences in a sorted arrayBinary SearchLower and upper boundsMediumGFGGFG

231How many times is a sorted array rotatedBinary SearchLower and upper boundsMediumGFGGFG

232Peak Index in a Mountain ArrayBinary SearchLower and upper boundsMediumLeetCodeLC

233Binary SearchBinary SearchSearching a sorted array147 DSA SheetEasySolve

234Search in Rotated Sorted ArrayBinary SearchSearching a sorted array147 DSA SheetMediumSolve

235Find Minimum in Rotated Sorted ArrayBinary SearchSearching a sorted array147 DSA SheetMediumSolve

236Search in Rotated Sorted Array IIBinary SearchSearching a sorted arrayMediumLeetCodeLC

237Single Element in a Sorted ArrayBinary SearchSearching a sorted arrayMediumLeetCodeLC

238Find Peak ElementBinary SearchSearching a sorted array147 DSA SheetMediumSolve

239Time Based Key-Value StoreBinary SearchSearching a sorted arrayMediumLeetCodeLC

240Sqrt(x)Binary SearchSearching the answer147 DSA SheetEasySolve

241Koko Eating BananasBinary SearchSearching the answer147 DSA SheetMediumSolve

242Magnetic Force Between Two BallsBinary SearchSearching the answer147 DSA SheetMediumSolve

243Split Array Largest SumBinary SearchSearching the answer147 DSA SheetHardSolve

244Nth root of a numberBinary SearchSearching the answerMediumGFGGFG

245Find the Smallest Divisor Given a ThresholdBinary SearchSearching the answerMediumLeetCodeLC

246Minimum Number of Days to Make m BouquetsBinary SearchSearching the answerMediumLeetCodeLC

247Capacity To Ship Packages Within D DaysBinary SearchSearching the answerMediumLeetCodeLC

248Kth Missing Positive NumberBinary SearchSearching the answerEasyLeetCodeLC

249Aggressive cowsBinary SearchSearching the answerHardGFGGFG

250Book allocationBinary SearchSearching the answerHardGFGGFG

251Painter's partitionBinary SearchSearching the answerHardGFGGFG

252Minimize Max Distance to Gas StationBinary SearchSearching the answerHardLeetCodeLC

253Search a 2D MatrixBinary SearchSearching a matrixMediumLeetCodeLC

254Search a 2D Matrix IIBinary SearchSearching a matrixMediumLeetCodeLC

255Kth Smallest Element in a Sorted MatrixBinary SearchSearching a matrixMediumLeetCodeLC

256Row with the most 1sBinary SearchSearching a matrixMediumGFGGFG

257Find a Peak Element IIBinary SearchSearching a matrixMediumLeetCodeLC

258Median of a Row Wise Sorted MatrixBinary SearchSearching a matrixMediumLeetCodeLC

259Median of Two Sorted ArraysBinary SearchPartition search147 DSA SheetHardSolve

260K-th element of two sorted arraysBinary SearchPartition searchHardGFGGFG

261Traverse a linked listLinked ListsSingly linked list basicsEasyGFGGFG

262Length of a linked listLinked ListsSingly linked list basicsEasyGFGGFG

263Search in a linked listLinked ListsSingly linked list basicsEasyGFGGFG

264Insert at the headLinked ListsSingly linked list basicsMediumGFGGFG

265Insert at the tailLinked ListsSingly linked list basicsMediumGFGGFG

266Insert at position KLinked ListsSingly linked list basicsMediumComing soonSoon

267Insert before the value XLinked ListsSingly linked list basicsMediumComing soonSoon

268Delete the headLinked ListsSingly linked list basicsMediumGFGGFG

269Delete the tailLinked ListsSingly linked list basicsMediumGFGGFG

270Delete the K-th nodeLinked ListsSingly linked list basicsMediumComing soonSoon

271Delete the node with value XLinked ListsSingly linked list basicsMediumComing soonSoon

272Delete Node in a Linked ListLinked ListsSingly linked list basicsMediumLeetCodeLC

273Remove Linked List ElementsLinked ListsSingly linked list basicsEasyLeetCodeLC

274Design Linked ListLinked ListsSingly linked list basicsMediumLeetCodeLC

275Build a doubly linked list from an arrayLinked ListsDoubly linked listsMediumGFGGFG

276Insert before the headLinked ListsDoubly linked listsMediumGFGGFG

277Insert before the tailLinked ListsDoubly linked listsMediumComing soonSoon

278Insert before the K-th nodeLinked ListsDoubly linked listsMediumComing soonSoon

279Insert before a given nodeLinked ListsDoubly linked listsMediumComing soonSoon

280Delete the headLinked ListsDoubly linked listsMediumGFGGFG

281Delete the tailLinked ListsDoubly linked listsMediumComing soonSoon

282Delete the K-th nodeLinked ListsDoubly linked listsMediumComing soonSoon

283Delete a given nodeLinked ListsDoubly linked listsMediumComing soonSoon

284Reverse a doubly linked listLinked ListsDoubly linked listsMediumGFGGFG

285Delete every occurrence of a keyLinked ListsDoubly linked listsMediumGFGGFG

286Remove duplicates from a sorted doubly linked listLinked ListsDoubly linked listsMediumGFGGFG

287Pairs with a given sum in a doubly linked listLinked ListsDoubly linked listsMediumGFGGFG

288Middle of the Linked ListLinked ListsFast and slow pointers147 DSA SheetEasySolve

289Linked List CycleLinked ListsFast and slow pointers147 DSA SheetEasySolve

290Remove Nth Node From End of ListLinked ListsFast and slow pointers147 DSA SheetMediumSolve

291Palindrome Linked ListLinked ListsFast and slow pointersEasyLeetCodeLC

292Intersection of Two Linked ListsLinked ListsFast and slow pointersEasyLeetCodeLC

293Linked List Cycle IILinked ListsFast and slow pointers147 DSA SheetMediumSolve

294Find the Duplicate NumberLinked ListsFast and slow pointersMediumLeetCodeLC

295Delete the Middle Node of a Linked ListLinked ListsFast and slow pointersMediumLeetCodeLC

296Length of the loop in a linked listLinked ListsFast and slow pointersEasyGFGGFG

297Reverse Linked ListLinked ListsReversing and rewiring147 DSA SheetEasySolve

298Merge Two Sorted ListsLinked ListsReversing and rewiring147 DSA SheetEasySolve

299Reorder ListLinked ListsReversing and rewiring147 DSA SheetMediumSolve

300Add Two NumbersLinked ListsReversing and rewiring147 DSA SheetMediumSolve

301Rotate ListLinked ListsReversing and rewiringMediumLeetCodeLC

302Sort ListLinked ListsReversing and rewiringMediumLeetCodeLC

303Copy List with Random PointerLinked ListsReversing and rewiring147 DSA SheetMediumSolve

304Reverse Nodes in k-GroupLinked ListsReversing and rewiring147 DSA SheetHardSolve

305Odd Even Linked ListLinked ListsReversing and rewiringMediumLeetCodeLC

306Reverse Linked List IILinked ListsReversing and rewiringMediumLeetCodeLC

307Plus One Linked ListLinked ListsReversing and rewiringMediumLeetCodeLC

308Next Greater Node In Linked ListLinked ListsReversing and rewiringMediumLeetCodeLC

309Sort a linked list of 0s, 1s and 2sLinked ListsReversing and rewiringMediumGFGGFG

310Flatten a linked listLinked ListsReversing and rewiringHardGFGGFG

311LRU CacheLinked ListsA list and a map together147 DSA SheetMediumSolve

312LFU CacheLinked ListsA list and a map togetherHardLeetCodeLC

313Does a subsequence with sum K existRecursion and BacktrackingPick or skipMediumComing soonSoon

314Count subsequences with sum KRecursion and BacktrackingPick or skipMediumGFGGFG

315Binary strings without consecutive 1sRecursion and BacktrackingPick or skipMediumGFGGFG

316Reverse a stack with recursionRecursion and BacktrackingRecursion on a stackMediumGFGGFG

317Sort a stack with recursionRecursion and BacktrackingRecursion on a stackMediumGFGGFG

318SubsetsRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

319PermutationsRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

320Subsets IIRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

321Combination SumRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

322Combination Sum IIRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

323Letter Combinations of a Phone NumberRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

324Generate ParenthesesRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

325Palindrome PartitioningRecursion and BacktrackingGenerating every choice147 DSA SheetMediumSolve

326CombinationsRecursion and BacktrackingGenerating every choiceMediumLeetCodeLC

327Permutations IIRecursion and BacktrackingGenerating every choiceMediumLeetCodeLC

328Combination Sum IIIRecursion and BacktrackingGenerating every choiceMediumLeetCodeLC

329Gray CodeRecursion and BacktrackingGenerating every choiceMediumLeetCodeLC

330Word SearchRecursion and BacktrackingSearching with constraints147 DSA SheetMediumSolve

331N-QueensRecursion and BacktrackingSearching with constraints147 DSA SheetHardSolve

332Sudoku SolverRecursion and BacktrackingSearching with constraintsHardLeetCodeLC

333Rat in a mazeRecursion and BacktrackingSearching with constraintsHardGFGGFG

334M-coloringRecursion and BacktrackingSearching with constraintsHardGFGGFG

335Beautiful ArrangementRecursion and BacktrackingSearching with constraintsMediumLeetCodeLC

336Word Break IIRecursion and BacktrackingSearching with constraintsHardLeetCodeLC

337Expression Add OperatorsRecursion and BacktrackingSearching with constraintsHardLeetCodeLC

338Binary Tree Preorder TraversalBinary TreesTraversalsEasyLeetCodeLC

339Binary Tree Inorder TraversalBinary TreesTraversalsEasyLeetCodeLC

340Binary Tree Postorder TraversalBinary TreesTraversalsEasyLeetCodeLC

341Preorder, inorder and postorder in one passBinary TreesTraversalsMediumGFGGFG

342Morris inorder traversalBinary TreesTraversalsHardGFGGFG

343Morris preorder traversalBinary TreesTraversalsHardGFGGFG

344Maximum Depth of Binary TreeBinary TreesDepth first: return a value up147 DSA SheetEasySolve

345Invert Binary TreeBinary TreesDepth first: return a value up147 DSA SheetEasySolve

346Same TreeBinary TreesDepth first: return a value up147 DSA SheetEasySolve

347Subtree of Another TreeBinary TreesDepth first: return a value up147 DSA SheetEasySolve

348Balanced Binary TreeBinary TreesDepth first: return a value upEasyLeetCodeLC

349Diameter of Binary TreeBinary TreesDepth first: return a value up147 DSA SheetEasySolve

350Count Good Nodes in Binary TreeBinary TreesDepth first: return a value upMediumLeetCodeLC

351Binary Tree PathsBinary TreesDepth first: return a value upEasyLeetCodeLC

352Lowest Common Ancestor of a Binary TreeBinary TreesDepth first: return a value up147 DSA SheetMediumSolve

353Binary Tree Maximum Path SumBinary TreesDepth first: return a value up147 DSA SheetHardSolve

354Boundary of Binary TreeBinary TreesDepth first: return a value upMediumLeetCodeLC

355Minimum Depth of Binary TreeBinary TreesDepth first: return a value upEasyLeetCodeLC

356Symmetric TreeBinary TreesDepth first: return a value upEasyLeetCodeLC

357Merge Two Binary TreesBinary TreesDepth first: return a value upEasyLeetCodeLC

358Path SumBinary TreesDepth first: return a value upEasyLeetCodeLC

359Path Sum IIBinary TreesDepth first: return a value upMediumLeetCodeLC

360Sum Root to Leaf NumbersBinary TreesDepth first: return a value upMediumLeetCodeLC

361Path Sum IIIBinary TreesDepth first: return a value upMediumLeetCodeLC

362Children sum propertyBinary TreesDepth first: return a value upMediumGFGGFG

363Path from the root to a nodeBinary TreesDepth first: return a value upMediumGFGGFG

364Count Complete Tree NodesBinary TreesDepth first: return a value upMediumLeetCodeLC

365Flatten Binary Tree to Linked ListBinary TreesDepth first: return a value upMediumLeetCodeLC

366House Robber IIIBinary TreesDepth first: return a value upMediumLeetCodeLC

367Binary Tree Level Order TraversalBinary TreesBreadth first: level by level147 DSA SheetMediumSolve

368Binary Tree Right Side ViewBinary TreesBreadth first: level by level147 DSA SheetMediumSolve

369Maximum Width of Binary TreeBinary TreesBreadth first: level by levelMediumLeetCodeLC

370All Nodes Distance K in Binary TreeBinary TreesBreadth first: level by level147 DSA SheetMediumSolve

371Amount of Time for Binary Tree to Be InfectedBinary TreesBreadth first: level by levelMediumLeetCodeLC

372Vertical Order Traversal of a Binary TreeBinary TreesBreadth first: level by levelHardLeetCodeLC

373Binary Tree Zigzag Level Order TraversalBinary TreesBreadth first: level by levelMediumLeetCodeLC

374Binary Tree Level Order Traversal IIBinary TreesBreadth first: level by levelMediumLeetCodeLC

375Average of Levels in Binary TreeBinary TreesBreadth first: level by levelEasyLeetCodeLC

376Populating Next Right Pointers in Each NodeBinary TreesBreadth first: level by levelMediumLeetCodeLC

377Top view of a binary treeBinary TreesBreadth first: level by levelMediumGFGGFG

378Bottom view of a binary treeBinary TreesBreadth first: level by levelMediumGFGGFG

379Construct Binary Tree from Preorder and Inorder TraversalBinary TreesBuilding and serializing147 DSA SheetMediumSolve

380Serialize and Deserialize Binary TreeBinary TreesBuilding and serializing147 DSA SheetHardSolve

381Construct Binary Tree from Inorder and Postorder TraversalBinary TreesBuilding and serializingMediumLeetCodeLC

382Search in a Binary Search TreeBinary Search TreesBST basicsEasyLeetCodeLC

383Minimum and maximum in a BSTBinary Search TreesBST basicsEasyGFGGFG

384Floor and ceil in a BSTBinary Search TreesBST basicsMediumGFGGFG

385Range Sum of BSTBinary Search TreesBST basicsEasyLeetCodeLC

386Convert Sorted Array to Binary Search TreeBinary Search TreesBST basicsEasyLeetCodeLC

387Validate Binary Search TreeBinary Search TreesUsing the ordering147 DSA SheetMediumSolve

388Kth Smallest Element in a BSTBinary Search TreesUsing the ordering147 DSA SheetMediumSolve

389Lowest Common Ancestor of a Binary Search TreeBinary Search TreesUsing the ordering147 DSA SheetMediumSolve

390Insert into a Binary Search TreeBinary Search TreesUsing the orderingMediumLeetCodeLC

391Delete Node in a BSTBinary Search TreesUsing the ordering147 DSA SheetMediumSolve

392Construct Binary Search Tree from Preorder TraversalBinary Search TreesUsing the orderingMediumLeetCodeLC

393Two Sum IV - Input is a BSTBinary Search TreesUsing the orderingEasyLeetCodeLC

394Recover Binary Search TreeBinary Search TreesUsing the ordering147 DSA SheetMediumSolve

395Largest BST SubtreeBinary Search TreesUsing the orderingMediumLeetCodeLC

396Trim a Binary Search TreeBinary Search TreesUsing the orderingMediumLeetCodeLC

397Inorder Successor in BSTBinary Search TreesUsing the orderingMediumLeetCodeLC

398Binary Search Tree IteratorBinary Search TreesUsing the orderingMediumLeetCodeLC

399Maximum Sum BST in Binary TreeBinary Search TreesUsing the orderingHardLeetCodeLC

400Implement Min HeapHeapsBuilding a heapMediumGFGGFG

401Implement a max heapHeapsBuilding a heapMediumGFGGFG

402Build a heap from an arrayHeapsBuilding a heapEasyGFGGFG

403Does an array represent a min heapHeapsBuilding a heapMediumGFGGFG

404Convert a min heap to a max heapHeapsBuilding a heapMediumGFGGFG

405Heap sortHeapsBuilding a heapHardGFGGFG

406Kth Largest Element in a StreamHeapsTop K147 DSA SheetEasySolve

407Kth Largest Element in an ArrayHeapsTop K147 DSA SheetMediumSolve

408K Closest Points to OriginHeapsTop K147 DSA SheetMediumSolve

409K-th smallest element with a heapHeapsTop KMediumGFGGFG

410Find K Closest ElementsHeapsTop KMediumLeetCodeLC

411Sort a nearly sorted arrayHeapsTop KMediumGFGGFG

412Rank Transform of an ArrayHeapsTop KEasyLeetCodeLC

413Maximum sum combinationsHeapsTop KMediumGFGGFG

414Last Stone WeightHeapsSimulating with a heap147 DSA SheetEasySolve

415Task SchedulerHeapsSimulating with a heap147 DSA SheetMediumSolve

416Design TwitterHeapsSimulating with a heapMediumLeetCodeLC

417Connect ropes at minimum costHeapsSimulating with a heapEasyGFGGFG

418Reorganize StringHeapsSimulating with a heapMediumLeetCodeLC

419IPOHeapsSimulating with a heapHardLeetCodeLC

420Find Median from Data StreamHeapsTwo heaps147 DSA SheetHardSolve

421Merge k Sorted ListsHeapsMerging k sorted lists147 DSA SheetHardSolve

422Implement Trie (Prefix Tree)TriesPrefix trees147 DSA SheetMediumSolve

423Design Add and Search Words Data StructureTriesPrefix trees147 DSA SheetMediumSolve

424Longest Word in DictionaryTriesPrefix treesMediumLeetCodeLC

425Implement Trie II (Prefix Tree)TriesPrefix treesMediumLeetCodeLC

426Word Search IITriesPrefix trees147 DSA SheetHardSolve

427Number of Distinct Substrings in a StringTriesPrefix treesMediumLeetCodeLC

428Longest Word With All PrefixesTriesPrefix treesMediumLeetCodeLC

429Maximum XOR of Two Numbers in an ArrayTriesTries over bitsMediumLeetCodeLC

430Maximum XOR With an Element From ArrayTriesTries over bitsHardLeetCodeLC

431BFS and DFS of a graphGraphsGraph basicsEasyGFGGFG

432Keys and RoomsGraphsGraph basicsMediumLeetCodeLC

433All Paths From Source to TargetGraphsGraph basicsMediumLeetCodeLC

434Flood FillGraphsGrids as graphs147 DSA SheetEasySolve

435Number of IslandsGraphsGrids as graphs147 DSA SheetMediumSolve

436Max Area of IslandGraphsGrids as graphsMediumLeetCodeLC

437Surrounded RegionsGraphsGrids as graphs147 DSA SheetMediumSolve

438Pacific Atlantic Water FlowGraphsGrids as graphs147 DSA SheetMediumSolve

439Number of Distinct IslandsGraphsGrids as graphsMediumLeetCodeLC

440Number of EnclavesGraphsGrids as graphsMediumLeetCodeLC

441Number of Closed IslandsGraphsGrids as graphsMediumLeetCodeLC

442Rotting OrangesGraphsFewest steps with BFS147 DSA SheetMediumSolve

44301 MatrixGraphsFewest steps with BFS147 DSA SheetMediumSolve

444Walls and GatesGraphsFewest steps with BFSMediumLeetCodeLC

445Shortest Path in Binary MatrixGraphsFewest steps with BFSMediumLeetCodeLC

446Word LadderGraphsFewest steps with BFS147 DSA SheetHardSolve

447Shortest path with unit weightsGraphsFewest steps with BFSMediumGFGGFG

448Clone GraphGraphsTraversing a graph147 DSA SheetMediumSolve

449Is Graph Bipartite?GraphsTraversing a graphMediumLeetCodeLC

450Number of Connected Components in an Undirected GraphGraphsTraversing a graphMediumLeetCodeLC

451Graph Valid TreeGraphsTraversing a graphMediumLeetCodeLC

452Number of ProvincesGraphsTraversing a graphMediumLeetCodeLC

453Cycle in an undirected graphGraphsCycle detectionMediumGFGGFG

454Cycle in a directed graphGraphsCycle detectionMediumGFGGFG

455Course ScheduleGraphsTopological sort147 DSA SheetMediumSolve

456Course Schedule IIGraphsTopological sort147 DSA SheetMediumSolve

457Alien DictionaryGraphsTopological sortHardLeetCodeLC

458Topological sort (Kahn's algorithm)GraphsTopological sortMediumGFGGFG

459Find Eventual Safe StatesGraphsTopological sortMediumLeetCodeLC

460Course Schedule IVGraphsTopological sortMediumLeetCodeLC

461Minimum Height TreesGraphsTopological sortMediumLeetCodeLC

462Redundant ConnectionGraphsUnion-find147 DSA SheetMediumSolve

463Number of Operations to Make Network ConnectedGraphsUnion-findMediumLeetCodeLC

464Making A Large IslandGraphsUnion-findHardLeetCodeLC

465Number of Islands IIGraphsUnion-findHardLeetCodeLC

466Disjoint set unionGraphsUnion-findMediumGFGGFG

467Accounts MergeGraphsUnion-findMediumLeetCodeLC

468Most Stones Removed with Same Row or ColumnGraphsUnion-findMediumLeetCodeLC

469Satisfiability of Equality EquationsGraphsUnion-findMediumLeetCodeLC

470Redundant Connection IIGraphsUnion-findHardLeetCodeLC

471Network Delay TimeAdvanced GraphsWeighted shortest paths147 DSA SheetMediumSolve

472Path With Minimum EffortAdvanced GraphsWeighted shortest paths147 DSA SheetMediumSolve

473Cheapest Flights Within K StopsAdvanced GraphsWeighted shortest paths147 DSA SheetMediumSolve

474Swim in Rising WaterAdvanced GraphsWeighted shortest paths147 DSA SheetHardSolve

475Find the City With the Smallest Number of Neighbors at a Threshold DistanceAdvanced GraphsWeighted shortest pathsMediumLeetCodeLC

476Word Ladder IIAdvanced GraphsWeighted shortest pathsHardLeetCodeLC

477Shortest path in a DAGAdvanced GraphsWeighted shortest pathsMediumGFGGFG

478Dijkstra's algorithmAdvanced GraphsWeighted shortest pathsMediumGFGGFG

479Print the shortest pathAdvanced GraphsWeighted shortest pathsMediumGFGGFG

480Number of Ways to Arrive at DestinationAdvanced GraphsWeighted shortest pathsMediumLeetCodeLC

481Path with Maximum ProbabilityAdvanced GraphsWeighted shortest pathsMediumLeetCodeLC

482Minimum multiplications to reach the endAdvanced GraphsWeighted shortest pathsHardGFGGFG

483Bellman-Ford algorithmAdvanced GraphsWeighted shortest pathsMediumGFGGFG

484Floyd-Warshall algorithmAdvanced GraphsWeighted shortest pathsHardGFGGFG

485Min Cost to Connect All PointsAdvanced GraphsMinimum spanning trees147 DSA SheetMediumSolve

486Minimum spanning tree weightAdvanced GraphsMinimum spanning treesMediumGFGGFG

487Reconstruct ItineraryAdvanced GraphsSpecial edges and pathsHardLeetCodeLC

488Critical Connections in a NetworkAdvanced GraphsSpecial edges and pathsHardLeetCodeLC

489Strongly connected components (Kosaraju)Advanced GraphsSpecial edges and pathsHardGFGGFG

490Articulation pointsAdvanced GraphsSpecial edges and pathsHardGFGGFG

491Jump GameGreedyThe best choice now147 DSA SheetMediumSolve

492Jump Game IIGreedyThe best choice now147 DSA SheetMediumSolve

493Gas StationGreedyThe best choice now147 DSA SheetMediumSolve

494Partition LabelsGreedyThe best choice now147 DSA SheetMediumSolve

495Hand of StraightsGreedyThe best choice nowMediumLeetCodeLC

496Merge Triplets to Form Target TripletGreedyThe best choice nowMediumLeetCodeLC

497Valid Parenthesis StringGreedyThe best choice now147 DSA SheetMediumSolve

498CandyGreedyThe best choice now147 DSA SheetHardSolve

499Assign CookiesGreedyThe best choice nowEasyLeetCodeLC

500Lemonade ChangeGreedyThe best choice nowEasyLeetCodeLC

501Fractional knapsackGreedyThe best choice nowMediumGFGGFG

502Fewest coins with greedyGreedyThe best choice nowEasyGFGGFG

503Shortest job firstGreedyThe best choice nowMediumGFGGFG

504Job sequencingGreedyThe best choice nowMediumGFGGFG

505Minimum Number of Arrows to Burst BalloonsGreedyThe best choice nowMediumLeetCodeLC

506Merge IntervalsIntervalsMerging and scheduling147 DSA SheetMediumSolve

507Insert IntervalIntervalsMerging and scheduling147 DSA SheetMediumSolve

508Non-overlapping IntervalsIntervalsMerging and scheduling147 DSA SheetMediumSolve

509Meeting RoomsIntervalsMerging and schedulingEasyLeetCodeLC

510Meeting Rooms IIIntervalsMerging and schedulingMediumLeetCodeLC

511Minimum Interval to Include Each QueryIntervalsMerging and scheduling147 DSA SheetHardSolve

512Most meetings in one roomIntervalsMerging and schedulingEasyGFGGFG

513Minimum platformsIntervalsMerging and schedulingMediumGFGGFG

514Climbing Stairs1-D Dynamic ProgrammingTake it or skip it147 DSA SheetEasySolve

515Min Cost Climbing Stairs1-D Dynamic ProgrammingTake it or skip itEasyLeetCodeLC

516House Robber1-D Dynamic ProgrammingTake it or skip it147 DSA SheetMediumSolve

517House Robber II1-D Dynamic ProgrammingTake it or skip it147 DSA SheetMediumSolve

518Decode Ways1-D Dynamic ProgrammingTake it or skip it147 DSA SheetMediumSolve

519Word Break1-D Dynamic ProgrammingTake it or skip it147 DSA SheetMediumSolve

520N-th Tribonacci Number1-D Dynamic ProgrammingTake it or skip itEasyLeetCodeLC

521Frog jump with K steps1-D Dynamic ProgrammingTake it or skip itEasyGFGGFG

522Perfect Squares1-D Dynamic ProgrammingTake it or skip itMediumLeetCodeLC

523Minimum Cost For Tickets1-D Dynamic ProgrammingTake it or skip itMediumLeetCodeLC

524Training schedule with no repeated activity1-D Dynamic ProgrammingTake it or skip itMediumGFGGFG

525Longest Palindromic Substring1-D Dynamic ProgrammingPalindromes147 DSA SheetMediumSolve

526Palindromic Substrings1-D Dynamic ProgrammingPalindromes147 DSA SheetMediumSolve

527Longest Increasing Subsequence1-D Dynamic ProgrammingIncreasing subsequences147 DSA SheetMediumSolve

528Number of Longest Increasing Subsequence1-D Dynamic ProgrammingIncreasing subsequencesMediumLeetCodeLC

529Print a longest increasing subsequence1-D Dynamic ProgrammingIncreasing subsequencesHardGFGGFG

530Largest Divisible Subset1-D Dynamic ProgrammingIncreasing subsequencesMediumLeetCodeLC

531Longest String Chain1-D Dynamic ProgrammingIncreasing subsequencesMediumLeetCodeLC

532Longest bitonic subsequence1-D Dynamic ProgrammingIncreasing subsequencesMediumGFGGFG

533Best Time to Buy and Sell Stock with Cooldown1-D Dynamic ProgrammingBuying and selling with states147 DSA SheetMediumSolve

534Best Time to Buy and Sell Stock with Transaction Fee1-D Dynamic ProgrammingBuying and selling with statesMediumLeetCodeLC

535Best Time to Buy and Sell Stock IV1-D Dynamic ProgrammingBuying and selling with statesHardLeetCodeLC

536Best Time to Buy and Sell Stock II1-D Dynamic ProgrammingBuying and selling with statesMediumLeetCodeLC

537Best Time to Buy and Sell Stock III1-D Dynamic ProgrammingBuying and selling with statesHardLeetCodeLC

538Unique Paths2-D Dynamic ProgrammingPaths in a grid147 DSA SheetMediumSolve

539Unique Paths II2-D Dynamic ProgrammingPaths in a gridMediumLeetCodeLC

540Longest Increasing Path in a Matrix2-D Dynamic ProgrammingPaths in a grid147 DSA SheetHardSolve

541Minimum Path Sum2-D Dynamic ProgrammingPaths in a gridMediumLeetCodeLC

542Triangle2-D Dynamic ProgrammingPaths in a gridMediumLeetCodeLC

543Minimum Falling Path Sum2-D Dynamic ProgrammingPaths in a gridMediumLeetCodeLC

544Count Square Submatrices with All Ones2-D Dynamic ProgrammingPaths in a gridMediumLeetCodeLC

545Cherry Pickup II2-D Dynamic ProgrammingPaths in a gridHardLeetCodeLC

5460/1 knapsack2-D Dynamic ProgrammingKnapsackMediumGFGGFG

547Partition Equal Subset Sum2-D Dynamic ProgrammingKnapsack147 DSA SheetMediumSolve

548Coin Change2-D Dynamic ProgrammingKnapsack147 DSA SheetMediumSolve

549Coin Change II2-D Dynamic ProgrammingKnapsack147 DSA SheetMediumSolve

550Target Sum2-D Dynamic ProgrammingKnapsack147 DSA SheetMediumSolve

551Last Stone Weight II2-D Dynamic ProgrammingKnapsackMediumLeetCodeLC

552Subset sum2-D Dynamic ProgrammingKnapsackMediumGFGGFG

553Count subsets with sum K2-D Dynamic ProgrammingKnapsackMediumGFGGFG

554Count partitions with a given difference2-D Dynamic ProgrammingKnapsackMediumGFGGFG

555Unbounded knapsack2-D Dynamic ProgrammingKnapsackMediumGFGGFG

556Rod cutting2-D Dynamic ProgrammingKnapsackHardGFGGFG

557Partition Array Into Two Arrays to Minimize Sum Difference2-D Dynamic ProgrammingKnapsackHardLeetCodeLC

558Longest Common Subsequence2-D Dynamic ProgrammingTwo strings147 DSA SheetMediumSolve

559Maximum Length of Repeated Subarray2-D Dynamic ProgrammingTwo stringsMediumLeetCodeLC

560Edit Distance2-D Dynamic ProgrammingTwo strings147 DSA SheetMediumSolve

561Longest Palindromic Subsequence2-D Dynamic ProgrammingTwo stringsMediumLeetCodeLC

562Distinct Subsequences2-D Dynamic ProgrammingTwo stringsHardLeetCodeLC

563Interleaving String2-D Dynamic ProgrammingTwo stringsMediumLeetCodeLC

564Wildcard Matching2-D Dynamic ProgrammingTwo stringsHardLeetCodeLC

565Regular Expression Matching2-D Dynamic ProgrammingTwo stringsHardLeetCodeLC

566Print a longest common subsequence2-D Dynamic ProgrammingTwo stringsMediumGFGGFG

567Delete Operation for Two Strings2-D Dynamic ProgrammingTwo stringsMediumLeetCodeLC

568Minimum Insertion Steps to Make a String Palindrome2-D Dynamic ProgrammingTwo stringsHardLeetCodeLC

569Shortest Common Supersequence 2-D Dynamic ProgrammingTwo stringsHardLeetCodeLC

570Count palindromic subsequences2-D Dynamic ProgrammingTwo stringsHardGFGGFG

571Minimum ASCII Delete Sum for Two Strings2-D Dynamic ProgrammingTwo stringsMediumLeetCodeLC

572Burst Balloons2-D Dynamic ProgrammingSplitting a range147 DSA SheetHardSolve

573Palindrome Partitioning II2-D Dynamic ProgrammingSplitting a rangeHardLeetCodeLC

574Matrix chain multiplication2-D Dynamic ProgrammingSplitting a rangeHardGFGGFG

575Minimum Cost to Cut a Stick2-D Dynamic ProgrammingSplitting a rangeHardLeetCodeLC

576Partition Array for Maximum Sum2-D Dynamic ProgrammingSplitting a rangeMediumLeetCodeLC

577Ways to evaluate a boolean expression to true2-D Dynamic ProgrammingSplitting a rangeHardGFGGFG

578Find the Index of the First Occurrence in a StringString MatchingPattern matching147 DSA SheetEasySolve

579Shortest PalindromeString MatchingPattern matchingHardLeetCodeLC

580Rabin-KarpString MatchingPattern matchingMediumGFGGFG

581Z-functionString MatchingPattern matchingMediumGFGGFG

582Repeated String MatchString MatchingPattern matchingMediumLeetCodeLC

583Longest Happy PrefixString MatchingPattern matchingHardLeetCodeLC