1. Access First Element

2. Access Last Element

3. Add to Array-Form of Number

4. Alternating Bits in Binary

5. Arrange Parentheses

6. Array Jumps

7. Attendance Award Eligibility

8. Base 7

9. Biggest Island

10. Binary Complement

11. Binary Substrings

12. Binary Tree Path Sum

13. BiTree Cousins

14. Boat Docking Availability

15. Bubble Sort

16. Calculate Absolute Value

17. Calculate Factorial

18. Calculate Fuel for Advanced Spaceship

19. Calculate Median Value

20. Check Anagram

21. Check for Spaces

22. Check Identical Trees

23. Check if Array Contains Number

24. Check if Binary Tree is Uni-valued

25. Check Isomorphic Strings

26. Check Last Character

27. Check Power of Three

28. Check Specific Difference

29. Check String Length

30. Check Symmetric Tree