DFS
DFS notesPermutation & Combination & SubsetsSubsetsBeautiful ArrangementPalindrome PartitioningCombination SumCombination Sum IICombination Sum IIICombination Sum IVPermutationsPermutations IINext PermutationGenerate ParenthesesRemove Invalid ParenthesesWord Break IIArray NestingLexicographical NumbersN-QueensNested List Weight Sum (easy)Letter Combinations of a Phone Number (Medium)Letter Case Permutation (Easy Facebook)Next Closest TimePartition Equal Subset SumPartition to K Equal Sum SubsetsWord SearchNumbers With Same Consecutive DifferencesThe Earliest and Latest Rounds Where Players CompeteMatchsticks to Square241. Different Ways to Add Parentheses