Questions

Medium

• 17. Letter Combinations of a Phone Number
• 18. 4Sum
• 46. Permutations
• 47. Permutations II
• 77. Combinations
• 78. Subsets
• 90. Subsets II
• 216. Combination Sum III
• 254. Factor Combinations
• 291. Word Pattern II
• 339. Nested List Weight Sum
• 694. Number of Distinct Islands
• 695. Max Area of Island
• 784. Letter Case Permutation
• 797. All Paths From Source to Target
• 1849. Splitting a String Into Descending Consecutive Values

Hard

• 37. Sudoku Solver