1. Access First Element

2. Access Last Element

3. Add to Array-Form of Number

4. Alternating Bits in Binary

7. Attendance Award Eligibility

8. Base 7

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

29. Check String Length

30. Check Symmetric Tree

31. Common Elements

33. Compare String Lengths

34. Competition Ranking

35. Concatenate First and Last Characters

36. Concatenate First and Last Name

37. Concatenate Two Arrays

39. Convert Hours and Minutes to Seconds

40. Convert Number to Excel Column

41. Convert Timecode to Seconds

44. Count Matching Patterns

45. Count Occurrences

48. Count Vowels

49. Count Words

51. Digit Sum

52. Filter Outside Range

53. Find First and Last Position

54. Find Index

55. Find Largest Square

56. Find Minimum and Maximum

57. Find Pivot Index

58. Fizz Buzz

59. Flip and Invert Image

60. Flood Fill

63. Happy Number

64. Harmonious Subsequence

66. Identify Extra Character

68. Increment Array Elements

69. Indices for Two Sum

71. Insertion Sort

72. Insert Position

74. Invert Binary Tree

75. Is Average Whole Number

77. Is Palindrome

78. K Closest Numbers

80. Left Leaves

81. Lemonade Stand

82. Less than 42

83. Levels Sum

85. Longest Increasing Subsequence

90. Match Words Pattern

91. Max Avg Subarray

93. Maximum Product of Three Numbers

95. Maximum Subarray Sum

100. Max Sum of Subarray

103. Merge Trees

104. Merge Two Sorted Arrays

105. Merge Two Sorted Lists

106. Middle Node of Singly Linked List

111. Minutes to Seconds

112. Mismatch Array

114. Missing Numbers

115. Mountain Array

116. Nth Fibonacci Number

118. Number to Hexadecimal

119. Pair Array Sum

122. Pattern Index

123. Perfect Square

125. Power of Two

128. Rectangle Overlap Check

131. Remove Duplicates from List

132. Remove First N Characters

134. Remove Nth Node

135. Remove Vowels

137. Repeated Substring Pattern

138. Repeat String

139. Repetive Ones

140. Reshape Matrix

141. Return to Origin

142. Reverse Array Elements

143. Reverse Bits

144. Reverse Letter Cases

145. Reverse Linked List

147. Reverse Only English Letters

148. Reverse Words in Sentence