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HomeLeetCode ProblemsBacktracking

Backtracking Problems

88 Backtracking LeetCode problems · Solve with AI-powered hints & step-by-step explanations.

17Letter Combinations of a Phone NumberMedium22Generate ParenthesesMedium37Sudoku SolverHard39Combination SumMedium40Combination Sum IIMedium46PermutationsMedium47Permutations IIMedium51N-QueensHard52N-Queens IIHard77CombinationsMedium78SubsetsMedium79Word SearchMedium89Gray CodeMedium90Subsets IIMedium93Restore IP AddressesMedium95Unique Binary Search Trees IIMedium113Path Sum IIMedium126Word Ladder IIHard131Palindrome PartitioningMedium140Word Break IIHard212Word Search IIHard216Combination Sum IIIMedium257Binary Tree PathsEasy282Expression Add OperatorsHard301Remove Invalid ParenthesesHard306Additive NumberMedium357Count Numbers with Unique DigitsMedium401Binary WatchEasy473Matchsticks to SquareMedium491Non-decreasing SubsequencesMedium494Target SumMedium526Beautiful ArrangementMedium638Shopping OffersMedium67924 GameHard691Stickers to Spell WordHard698Partition to K Equal Sum SubsetsMedium773Sliding PuzzleHard784Letter Case PermutationMedium797All Paths From Source to TargetMedium816Ambiguous CoordinatesMedium842Split Array into Fibonacci SequenceMedium949Largest Time for Given DigitsMedium967Numbers With Same Consecutive DifferencesMedium980Unique Paths IIIHard988Smallest String Starting From LeafMedium996Number of Squareful ArraysHard1079Letter Tile PossibilitiesMedium1096Brace Expansion IIHard1219Path with Maximum GoldMedium1238Circular Permutation in Binary RepresentationMedium1239Maximum Length of a Concatenated String with Unique CharactersMedium1240Tiling a Rectangle with the Fewest SquaresHard1255Maximum Score Words Formed by LettersHard1286Iterator for CombinationMedium1307Verbal Arithmetic PuzzleHard1415The k-th Lexicographical String of All Happy Strings of Length nMedium1467Probability of a Two Boxes Having The Same Number of Distinct BallsHard1593Split a String Into the Max Number of Unique SubstringsMedium1601Maximum Number of Achievable Transfer RequestsHard1655Distribute Repeating IntegersHard1718Construct the Lexicographically Largest Valid SequenceMedium1723Find Minimum Time to Finish All JobsHard1774Closest Dessert CostMedium1799Maximize Score After N OperationsHard1849Splitting a String Into Descending Consecutive ValuesMedium1863Sum of All Subset XOR TotalsEasy1947Maximum Compatibility Score SumMedium1980Find Unique Binary StringMedium1986Minimum Number of Work Sessions to Finish the TasksMedium2002Maximum Product of the Length of Two Palindromic SubsequencesMedium2014Longest Subsequence Repeated k TimesHard2044Count Number of Maximum Bitwise-OR SubsetsMedium2048Next Greater Numerically Balanced NumberMedium2056Number of Valid Move Combinations On ChessboardHard2065Maximum Path Quality of a GraphHard2151Maximum Good People Based on StatementsHard2178Maximum Split of Positive Even IntegersMedium2212Maximum Points in an Archery CompetitionMedium2305Fair Distribution of CookiesMedium2375Construct Smallest Number From DI StringMedium2397Maximum Rows Covered by ColumnsMedium2597The Number of Beautiful SubsetsMedium2698Find the Punishment Number of an IntegerMedium2708Maximum Strength of a GroupMedium2767Partition String Into Minimum Beautiful SubstringsMedium3211Generate Binary Strings Without Adjacent ZerosMedium3348Smallest Divisible Digit Product IIHard3376Minimum Time to Break Locks IMedium
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