use Catch2 as test framework.
- Binary Tree: Sequential to linked list
- Tree to Binary Tree
- Forest to Binary Tree
- Quick Sort
- 1. Two Sum
- 2. Add Two Numbers
- 3. Longest Substring withour Repeating Characters
- 4. Median of Two Sorted Arrays
- 5. Longest Palindromic Substring
- 6. ZigZag Conversion
- 7. Reverse Integer
- 8. atoi
- 9. Palindrome Number
- 10. Regular Expression Matching
- 11. Container With Most Water
- 12. Integer to Roman
- 13. Roman to Integer
- 14. Longest Common Prefix
- 15. 3Sum