HackerRank

My HackerRank solutions and challenges

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30 Days of Code ✅

No	Question Name	Difficulty	Score	Solution(s)	Subject	HR Link
0	Day 0 : Hello, World	Easy	30	1	str	link
1	Day 1 : Data Types	Easy	30	1	str, int, float, data types	link
2	Day 2 : Operators	Easy	30	3	int, float, variables, arithmetic	link
3	Day 3 : Intro to Conditional Statements	Easy	30	4	if-elif-else, conditionals, logicals	link
4	Day 4 : Class vs. Instance	Easy	30	2	class	link
5	Day 5 : Loops	Easy	30	4	for, loops	link
6	Day 6 : Let's Review	Easy	30	3	str, manipulations	link
7	Day 7 : Arrays	Easy	30	3	array, list, sorting, data structures	link
8	Day 8 : Dictionaries and Maps	Easy	30	4	dict, mapping, hash tables data structures	link
9	Day 9 : Recursion 3	Easy	30	2	recursion, math, operators	link
10	Day 10 : Binary Numbers	Easy	30	3	bin, int	link
11	Day 11 : 2D Arrays	Easy	30	3	array, list, matrix	link
12	Day 12 : Inheritance	Easy	30	1	class, oop	link
13	Day 13 : Abstract Classes	Easy	30	1	class, oop	link
14	Day 14 : Scope	Easy	30	1	function, scope	link
15	Day 15 : Linked List	Easy	30	1	linked list, class, oop	link
16	Day 16 : Exceptions - String to Integer	Easy	30	1	exception	link
17	Day 17 : More Exceptions	Easy	30	1	exception	link
18	Day 18 : Queues and Stacks	Easy	30	2	queue, stack, class, oop	link
19	Day 19 : Interfaces	Easy	30	1	interface, class, oop	link
20	Day 20 : Sorting	Easy	30	1	swap, sort, bubble sort	link
21	Day 21 : Generics	Easy	30		not available for python	link
22	Day 22 : Binary Search Trees	Easy	30	1	data structures, bst, binary search tree	link
23	Day 23 : BST Level-Order Traversal	Easy	30	1	data structures, bst, binary search tree	link
24	Day 24 : More Linked Lists	Easy	30	1	data structures, linked list, list	link
25	Day 25 : Running Time and Complexity	Medium	30	1	math, big-o, time complexity	link
26	Day 26 : Nested Logic	Easy	30	1	if-elif-else, conditionals, logicals, control flow	link
27	Day 27 : Testing	Easy	30	1	test	link
28	Day 28 : RegEx, Patterns, and Intro to Databases	Medium	30	1	test	link
29	Day 29 : Bitwise AND	Medium	30	1	bitwise, logicals	link

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The HackerRank Interview Preparation Kit

No	Question Name	Difficulty	Score	Solution(s)	Subject	HR Link
1	Warm-up Challenges
1.1.	Sock Merchant	Easy	10	3	hashmap, dict	link
1.2.	Counting Valleys	Easy	15	2	array, list	link
1.3.	Jumping on the Clouds	Easy	20	1	array, list,	link
1.4.	Repeated String	Easy	20	1	str	link
2	Arrays
2.1.	2D Array - DS	Easy	15	1	array, list, matrix	link
2.2.	Arrays: Left Rotation	Easy	20	1	array, list, sort	link
2.3.	New Year Chaos	Medium	40	1	array, list, swap	link
2.4.	Minimum Swaps 2	Medium	40	1	array, list, swap	link
3	Dictionaries and Hashmaps
3.1.	Hash Tables: Ransom Note	Easy	25	3	hashmap, dict	link
3.2.	Two Strings	Easy	25	2	hashmap, set	link
3.3.	Sherlock and Anagrams	Medium	50	1	hashmap, dict	link
3.4.	Count Triplets	Medium	35	2	hashmap, dict	link
3.5.	Frequency Queries	Medium	40	2	hashmap, dict	link

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Python Language Proficiency ⏳

No	Question Name	Difficulty	Score	Solution(s)	Subject	HR Link
1	Say "Hello, World!" With Python	Easy	5	1	str	link
2	Python If-Else	Easy	10	2	if-elif-else, conditionals, control flow	link
3	Arithmetic Operators	Easy	10	2	math, operators	link
4	Division	Easy	10	2	math, operators, data types	link
5	Loops	Easy	10	2	loops, for, while	link
6	Write a function	Medium	10	2	function	link
7	Print Function	Easy	20	5	array, list, loops	link
8	List Comprehensions	Easy	10	2	array, list, matrix, list comprehension, data types	link
9	Find the Runner-Up Score	Easy	10	1	array, list, sort, data types	link
10	Nested Lists	Easy	10	1	array, list, nested list, sort, data types	link
11	Finding The Percentage	Easy	10	1	hashmap, dict, data types	link
12	Lists	Easy	10	1	array, list, data types	link
13	Tuples	Easy	10	1	tuple, data types	link
14	sWAP cASE	Easy	10	1	str, swap	link
15	String Split and Join	Easy	10	1	array, list	link
16	What's Your Name?	Easy	10	1	str, format	link
17	Mutations	Easy	10	1	str, manipulations	link
18	Find a string	Easy	10	1	str	link
19	String Validators	Easy	10	1	str, validation	link
20	Text Alignment	Easy	10	1	str, format	link
21	Text Wrap	Easy	10	1	str, format	link
22	Designer Door Mat	Easy	10	1	str, format	link
23	String Formatting	Easy	10	2	str, format	link
24	Alphabet_Rangoli	Easy	20	1	str, format	link
25	Capitalize	Easy	20	1	str, format	link
26	The Minion Game	Medium	40	1	str	link
27	Merge the Tools!	Medium	40	2	str, format, data types	link
30	collections.Counter()	Easy	10	1	hashmap, dict, data types, collections	link
31	itertools.permutations()	Easy	10	1	hashmap, dict, data types, itertools, permutation	link
34	DefaultDict Tutorial	Easy	20	1	hashmap, dict, data types, collections, defaultdict	link
37	Collections.namedtuple()	Easy	20	1	hashmap, collections, namedtuple	link
41	Collections.OrderedDict()	Easy	20	1	hashmap, collections, orderecdict	link
47	Word Order	Medium	50	2	hashmap, dict, data types, sort, collections, orderecdict	link
49	Collections.deque()	Easy	20	1	array, queue, stack, list collections, deque	link
51	Company Logo	Medium	30	1	array, dict, hashmap, sort	link

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Contests ⏳

No	Question Name	Difficulty	Score	Solution(s)	Subject	HR Link
1	appSMART : Python One	Hard	50	1	str, array, list, sort	link
2	Pycode2015 : Dictionary-Assignment	Medium	100	2	hashmap, dict, str, format	link