Algorithms Programming Fun

Solutions to coding challenges from Hacker Rank and Hacker Earth.

Hacker Rank

Algorithms

#	Problem	Solutions	Difficulty	Points
	Warmup
1.	Solve Me First	Kotlin	Easy	1
2.	Simple Array Sum	Java Scala	Easy	10
3.	Compare The Triplets	Java	Easy	10
4.	A Very Big Sum	Java	Easy	10
5.	Diagonal Difference	Java	Easy	10
6.	Plus Minus	Java	Easy	10
7.	Staircase	Java	Easy	10
8.	Mini-Max Sum	Haskell Kotlin	Easy	10
9.	Birthday Cake Candles	Java	Easy	10
10.	Time Conversion	Java	Easy	15
	Implementation
11.	Grading Students	Kotlin	Easy	10
12.	Apple and Orange	Kotlin	Easy	10
13.	Kangaroo	Kotlin	Easy	10
14.	Between Two Sets	Kotlin	Easy	10
15.	Breaking the Records	Java	Easy	10
16.	Birthday Chocolate	Kotlin	Easy	10
17.	Migratory Birds	Java	Easy	10
18.	Stock Merchant	Java	Easy	10
19.	Counting Valleys	Java	Easy	15
20.	Electronic Shop	Java	Easy	15
21.	Cat and A Mouse	Java	Easy	15
22.	Forming a Magic Square	Kotlin	Easy	20
23.	Picking Numbers	Kotlin	Easy	20
24.	Climbing the Leaderboard	Java Kotlin	Easy	20
25.	The Hurdle Race	Java	Easy	15
26.	Designer PDF Viewer	Kotlin	Easy	20
27.	Utopian Tree	Java	Easy	20
28.	Angry Professor	Java	Easy	20
29.	Beautiful Days at the Movies	Java	Easy	15
30.	Viral Advertising	Java	Easy	15
31.	Save the Prisoner!	Kotlin	Easy	15
32.	Circular Array Rotation	Java	Easy	20
33.	Sequence Equation	Kotlin	Easy	20
34.	Jumping on the Clouds: Revisited	Java	Easy	15
35.	Find Digits	Java	Easy	25
36.	Extra Long Factorials	Java	Medium	20
37.	Append and Delete	Kotlin	Easy	20
38.	Sherlock and Squares	Kotlin	Easy	20
39.	Library Fine	Java	Easy	15
40.	Cut the Sticks	Java	Easy	25
41.	Repeated String	Java	Easy	20
42.	Jumping on the Clouds	Java	Easy	20
43.	Equalize the Array	Java	Easy	20
44.	Taum and B'day	Java	Easy	25
45.	Encryption	Java	Medium	30
46.	Bigger is Greater	Java	Medium	35
47.	Minimum Distances	Java	Medium	20
48.	The Time in Words	Java	Medium	25
49.	Chocolate Feast	Java	Easy	25
50.	Cavity Map	Java	Easy	30
51.	Manasa and Stones	Java	Easy	30
52.	The Grid Search	Java	Medium	30
	Strings
53.	Super Reduced String	Java	Easy	10
54.	Camel Case	Java	Easy	15
55.	Mars Exploration	Java	Easy	15
56.	Pangrams	Java	Easy	20
57.	Funny String	Java	Easy	25
58.	Alternating Characters	Java	Easy	20
59.	Sherlock and the Valid String	Java	Easy	35
60.	Sherlock and Anagrams	Java	Medium	50
	Sorting
61.	Big Sorting	Java	Easy	20
62.	Intro to Tutorial Challenges	Java	Easy	30
63.	Insertion Sort - Part 1	Java	Easy	30
64.	Insertion Sort - Part 2	Java	Easy	30
	Search
65.	Ice Cream Parlor	Java	Easy	30
66.	Missing Numbers	Java	Easy	45
67.	Sherlock and Array	Java	Easy	40
68.	Connected Cells in a Grid	Kotlin	Medium	50
	Graph Theory
69.	Breadth First Search: Shortest Reach	Java	Medium	55
70.	Even Tree	Java	Medium	50
	Greedy
71.	LuckBalance	Java	Easy	20
72.	BeautifulPairs	Java	Easy	30
73.	SherlockAndTheBeast	Java	Easy	30
	Dynamic Programming
74.	Fibonacci Modified	Java	Medium	45
75.	The Maximum Subarray	Java	Medium	50
	Bit Manipulation
76.	Lonely Integer	Java	Easy	20

Functional Programming

#	Problem	Solution	Difficulty	Points
	Introduction
1.	List Replication	Scala	Easy	10
2.	Filter Array	Scala	Easy	10
3.	Filter Positions in a List	Scala	Easy	10
4.	Array Of N Elements	Scala	Easy	10
5.	Reverse a List	Scala	Easy	10
6.	Sum of Odd Elements	Haskell	Easy	10
7.	List Length	Haskell	Easy	10

Hacker Earth

Algorithms

#	Problem	Solutions	Difficulty
	Graphs
1.	Monk at the Graph Factory	Java	Easy