39 Combination Sum

11-19

47 Permutations II

11-16

46 Permutations

11-16

49 Group Anagrams

11-16

148 Sort List

11-10

147 Insertion Sort List

11-10

121 Best Time to Buy and Sell Stock

11-09

120 Triangle

11-08

143 Reorder List

11-08

87 Scramble String

11-06