Backtracking

24 problems

• 22.Generate ParenthesesMedium
• 37.Sudoku SolverHard
• 40.Combination Sum IIMedium
• 51.N-QueensHard
• 52.N-Queens IIHard
• 113.Path Sum IIMedium
• 126.Word Ladder IIHard
• 212.Word Search IIHard
• 257.Binary Tree PathsEasy
• 386.Lexicographical NumbersMedium
• 401.Binary WatchEasy
• 494.Target SumMedium
• 679.24 GameHard
• 784.Letter Case PermutationMedium
• 1079.Letter Tile PossibilitiesMedium
• 1415.The k-th Lexicographical String of All Happy Strings of Length nUnknown
• 1593.Split a String Into the Max Number of Unique SubstringsMedium
• 1718.Construct the Lexicographically Largest Valid SequenceUnknown
• 1799.Maximize Score After N OperationsUnknown
• 1863.Sum of All Subset XOR TotalsUnknown
• 1980.Find Unique Binary StringMedium
• 2014.Longest Subsequence Repeated k TimesUnknown
• 2044.Count Number of Maximum Bitwise-OR SubsetsMedium
• 2698.Find the Punishment Number of an IntegerUnknown