The following questions does not appear in NineChap, but they all worth reading.

Question List

  1. Longest Substring Without Repeating Characters

  2. Minimum Window Substring - very difficult

  3. Scramble String

  4. Recover Binary Search Tree

  5. Median of Two Sorted Arrays - difficult

  6. Sudoku Solver - difficult

  7. Word Search

  8. Simplify Path

  9. Regular Expression Matching - very difficult

  10. Wildcard Matching - difficult