1. 38. Count and Say

  2. 443. String Compression

  3. 994. Rotting Oranges

  4. 114. Flatten Binary Tree to Linked List

  5. 62. Unique Paths

  6. 23. Merge k Sorted Lists

  7. 347. Top K Frequent Elements

  8. 3. Longest Substring Without Repeating Characters

  9. 731. My Calendar II

  10. 2. Add Two Numbers

  11. 692. Top K Frequent Words

  12. 946. Validate Stack Sequences

  13. 75. Sort Colors

  14. 729. My Calendar I

  15. 2264. Largest 3-Same-Digit Number in String

  16. 26. Remove Duplicates from Sorted Array

  17. 1. Two Sum

  18. 15. 3Sum

  19. 813. Largest Sum of Averages

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