There are my solutions of HackerRank challenges.

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Problem solving

Algorithms

#Warmup

Easy

1. Solve Me First | Problem | Solution | Score: 1
2. Simple Array | Problem | Solution | Score: 10
3. Compare the Triplets | Problem | Solution | Score: 10
4. A Very Big Sum | Problem | Solution | Score: 10
5. Diagonal Difference | Problem | Solution | Score: 10
6. Plus Minus | Problem | Solution | Score: 10
7. Staircase | Problem | Solution | Score: 10
8. Mini-Max Sum | Problem | Solution | Score: 10
9. Birthday Cake Candles | Problem | Solution | Score: 10
10. Time Conversion | Problem | Solution | Score: 15

#Implementation

Easy

1. Grading Students | Problem | Solution | Score: 10
2. Apple and Orange | Problem | Solution | Score: 10
3. Number Line Jumps | Problem | Solution | Score: 10
4. Between Two Sets | Problem | Solution | Score: 10
5. Breaking the Records | Problem | Solution | Score: 10
6. Sub-array Division | Problem | Solution | Score: 10
7. Divisible Sum Pairs | Problem | Solution | Score: 10
8. Migratory Birds | Problem | Solution | Score: 10
9. Day of the Programmer | Problem | Solution | Score: 15
10. Bill Division | Problem | Solution | Score: 10
11. Sales by Match | Problem | Solution | Score: 10
12. Drawing Book | Problem | Solution | Score: 10
13. Counting Valleys | Problem | Solution | Score: 15
14. Electronics Shop | Problem | Solution | Score: 15
15. Cats and a Mouse | Problem | Solution | Score: 15
16. Picking Numbers | Problem | Solution | Score: 20
17. The Hurdle Race | Problem | Solution | Score: 15
18. Designer PDF Viewer | Problem | Solution | Score: 20
19. Utopian Tree | Problem | Solution | Score: 20
20. Angry Professor | Problem | Solution | Score: 20
21. Beautiful Days at the Movies | Problem | Solution | Score: 15
22. Viral Advertising | Problem | Solution | Score: 15
23. Save the Prisoner | Problem | Solution | Score: 15
24. Circular Array Rotation | Problem | Solution | Score: 20
25. Sequence Equation | Problem | Solution | Score: 20
26. Jumping on the Clouds: Revisited | Problem | Solution | Score: 15
27. Find Digits | Problem | Solution | Score: 25
28. Append and Delete | Problem | Solution | Score: 20
29. Sherlock and Squares | Problem | Solution | Score: 20
30. Library Fine | Problem | Solution | Score: 15
31. Cut the sticks | Problem | Solution | Score: 25
32. Repeated String | Problem | Solution | Score: 20
33. Jumping on the Clouds | Problem | Solution | Score: 20
34. Equalize the Array | Problem | Solution | Score: 20
35. ACM ICPC Team | Problem | Solution | Score: 25
36. Taum and B'day | Problem | Solution | Score: 25
37. Modified Kaprekar Numbers | Problem | Solution | Score: 30
38. Beautiful Triplets | Problem | Solution | Score: 20
39. Minimum Distances | Problem | Solution | Score: 20
40. Halloween Sale | Problem | Solution | Score: 20
41. Chocolate Feast | Problem | Solution | Score: 25
42. Service Lane | Problem | Solution | Score: 20
43. Lisa's Workbook | Problem | Solution | Score: 25
44. Flatland Space Stations | Problem | Solution | Score: 25
45. Fair Rations | Problem | Solution | Score: 25
46. Cavity Map | Problem | Solution | Score: 30
47. Manasa and Stones | Problem | Solution | Score: 30
48. Happy Ladybugs | Problem | Solution | Score: 30
49. Strange Counter | Problem | Solution | Score: 30

#Strings

Easy

1. Super Reduced String | Problem | Solution | Score: 10
2. CamelCase | Problem | Solution | Score: 15
3. Strong Password | Problem | Solution | Score: 15
4. Two Characters | Problem | Solution | Score: 20
5. Caesar Cipher | Problem | Solution | Score: 15
6. Mars Exploration | Problem | Solution | Score: 15
7. HackerRank in a String! | Problem | Solution | Score: 20
8. Pangrams | Problem | Solution | Score: 20
9. Weighted Uniform Strings | Problem | Solution | Score: 20
10. Separate the Numbers | Problem | Solution | Score: 20
11. Funny String | Problem | Solution | Score: 25
12. Gemstones | Problem | Solution | Score: 20
13. Alternating Characters | Problem | Solution | Score: 20
14. Beautiful Binary String | Problem | Solution | Score: 20
15. The Love-Letter Mystery | Problem | Solution | Score: 20
16. Palindrome Index | Problem | Solution | Score: 25
17. Anagram | Problem | Solution | Score: 25
18. Making Anagrams | Problem | Solution | Score: 30
19. Game of Thrones - I | Problem | Solution | Score: 30
20. Two Strings | Problem | Solution | Score: 25
21. String Construction | Problem | Solution | Score: 25

#Sorting

Easy

1. Big Sorting | Problem | Solution | Score: 20
2. Intro to Tutorial Challenges | Problem | Solution | Score: 30
3. Insertion Sort - Part 1 | Problem | Solution | Score: 30
4. Insertion Sort - Part 2 | Problem | Solution | Score: 30
5. Correctness and the Loop Invariant | Problem | Solution | Score: 30
6. Running Time of Algorithms | Problem | Solution | Score: 30
7. Quicksort 1 - Partition | Problem | Solution | Score: 10
8. Counting Sort 1 | Problem | Solution | Score: 30
9. Counting Sort 2 | Problem | Solution | Score: 30
10. Closest Numbers | Problem | Solution | Score: 35
11. Find the Median | Problem | Solution | Score: 35

#Search

Easy

1. Ice Cream Parlor | Problem | Solution | Score: 30
2. Missing Numbers | Problem | Solution | Score: 45
3. Sherlock and Array | Problem | Solution | Score: 40

#Greedy

Easy

1. Beautiful Pairs | Problem | [Solution] | Score: 30
2. Priyanka and Toys | Problem | Solution | Score: 30
3. Largest Permutation | Problem | [Solution] | Score: 30
4. Minimum Absolute Difference in an Array | Problem | Solution | Score: 15
5. Marc's Cakewalk | Problem | Solution | Score: 15
6. Grid Challenge | Problem | Solution | Score: 20
7. Luck Balance | Problem | Solution | Score: 20
8. Maximum Perimeter Triangle | Problem | Solution | Score: 20
9. Sherlock and The Beast | Problem | Solution | Score: 30
10. Mark and Toys | Problem | Solution | Score: 35
11. Jim and the Orders | Problem | Solution | Score: 40
12. Permuting Two Arrays | Problem | Solution | Score: 40