HackerRankProblems

Practicing the Problem Solving Skills Using the Problems offered by HackerRank Platform,
starting from September 2021 till October 2021 in continuous 30 days,
with a gradual difficulty in different techniques of problems.

Problems Set

30 Days of Code and 1 Month Preparation Kit

Solutions

Day 1

1. Plus Minus 1 Month Preparation Kit
2. Mini-Max Sum 1 Month Preparation Kit
3. Hello, World. 30 Days of Code

Day 2

4. Time Conversion 1 Month Preparation Kit
5. Sparse Arrays 1 Month Preparation Kit
6. Data Types 30 Days of Code

Day 3

7. Lonely Integer 1 Month Preparation Kit
8. Flipping Bits 1 Month Preparation Kit
9. Operators 30 Days of Code

Day 4

10. Diagonal Difference 1 Month Preparation Kit
11. Counting Sort 1 1 Month Preparation Kit
12. Intro to Conditional Statements 30 Days of Code

Day 5

13. Pangrams 1 Month Preparation Kit
14. Permuting Two Arrays 1 Month Preparation Kit
15. Class vs. Instance 30 Days of Code

Day 6

16. Subarray Division 1 1 Month Preparation Kit
17. XOR Strings 2 1 Month Preparation Kit
18. Loops 30 Days of Code

Day 7

19. Sales by Match 1 Month Preparation Kit
20. Zig Zag Sequence 1 Month Preparation Kit
21. Let's Review 30 Days of Code

Day 8

22. Drawing Book 1 Month Preparation Kit
23. Tower Breakers 1 Month Preparation Kit
24. Arrays 30 Days of Code

Day 9

25. Max Min 1 Month Preparation Kit
26. Caesar Cipher 1 Month Preparation Kit
27. Dictionaries and Maps 30 Days of Code

Day 10

28. Prime Dates 1 Month Preparation Kit
29. Dynamic Array 1 Month Preparation Kit
30. Grid Challenge 1 Month Preparation Kit
31. Recursion 3 30 Days of Code

Day 11

32. Recursive Digit Sum 1 Month Preparation Kit
33. Sherlock and Array 1 Month Preparation Kit
34. Binary Numbers 30 Days of Code

Day 12

35. Counter game 1 Month Preparation Kit
36. Sum vs XOR 1 Month Preparation Kit
37. 2D Arrays 30 Days of Code

Day 13

38. The Bomberman Game 1 Month Preparation Kit
39. New Year Chaos 1 Month Preparation Kit
40. Inheritance 30 Days of Code

Day 14

41. Sherlock and the Valid String 1 Month Preparation Kit
42. Climbing the Leaderboard 1 Month Preparation Kit
43. Abstract Classes 30 Days of Code

Day 15

44. Reverse a linked list 1 Month Preparation Kit
45. Reverse a doubly linked list 1 Month Preparation Kit
46. Scope 30 Days of Code

Day 16

47. Insert a node at a specific position in a linked list 1 Month Preparation Kit
48. Merge two sorted linked lists 1 Month Preparation Kit
49. Linked List 30 Days of Code

Day 17

50. Ice Cream Parlor 1 Month Preparation Kit
51. Queue using Two Stacks 1 Month Preparation Kit
52. Exceptions - String to Integer 30 Days of Code

Day 18

53. Balanced Brackets 1 Month Preparation Kit
54. Waiter 1 Month Preparation Kit
55. More Exceptions 30 Days of Code

Day 19

56. Simple Text Editor 1 Month Preparation Kit
57. Queues and Stacks 30 Days of Code

Day 20

58. Equal Stacks 1 Month Preparation Kit
59. The Maximum Subarray 1 Month Preparation Kit
60. Interfaces 30 Days of Code

Day 21

61. Lego Blocks 1 Month Preparation Kit
62. QHEAP1 1 Month Preparation Kit
63. Sorting 30 Days of Code

Day 22

64. Jesse and Cookies 1 Month Preparation Kit
65. Hackerland Radio Transmitters 1 Month Preparation Kit
66. Generics 30 Days of Code

Day 23

67. Queries with Fixed Length 1 Month Preparation Kit
68. Array Manipulation 1 Month Preparation Kit
69. Binary Search Trees 30 Days of Code

Day 24

70. Highest Value Palindrome 1 Month Preparation Kit
71. Lily's Homework 1 Month Preparation Kit
72. BST Level-Order Traversal 30 Days of Code

Day 25

73. Tree: Preorder Traversal 1 Month Preparation Kit
74. Tree Huffman Decoding 1 Month Preparation Kit
75. More Linked Lists 30 Days of Code

Day 26

76. Binary Search Tree: Lowest Common Ancestor 1 Month Preparation Kit
77. Running Time and Complexity 30 Days of Code

Day 27

78. No Prefix Set 1 Month Preparation Kit
79. Nested Logic 30 Days of Code

Day 28

80. Castle on the Grid 1 Month Preparation Kit
81. Testing 30 Days of Code

Day 29

82. Roads and Libraries 1 Month Preparation Kit
83. RegEx, Patterns, and Intro to Databases 30 Days of Code

Day 30

84. Array Manipulation 1 Month Preparation Kit
85. Bitwise AND 30 Days of Code