HackerRank

My solutions to HackerRank challenges.

JavaScript, Python and Go.

You can see my profile here: https://www.hackerrank.com/AminadavG.

All solution here created by me. I have tried to make the most optimal solutions. All of them are less than O(n^2). Most of them are O(n) / O(log n) or even O(1).

Table of Content:

Easy
Data Structure
Data Structure - Array
Data Structure - Linked List
Data Structure - Doubly Linked List
Data Structure - Tree
Medium
Hard

Algorithms

Easy

Data Structure

Array:

Array [Go]

Problem - https://www.hackerrank.com/challenges/arrays-ds
Solution - arrays-ds.go

2D Array [Go]

Problem - https://www.hackerrank.com/challenges/2d-array
Solution - 2d-array.go

Dynamic Array [Go]

Problem - https://www.hackerrank.com/challenges/dynamic-array
Solution - dynamic-array.go

Array Left Rotation [Go]

Problem - https://www.hackerrank.com/challenges/array-left-rotation
Solution - array-left-rotation.go

Sparse Arrays [Go]

Problem - https://www.hackerrank.com/challenges/sparse-arrays
Solution - sparse-arrays.go

Crush [JavaScript]

Problem - https://www.hackerrank.com/challenges/crush
Solution - crush.js

Linked List:

Linked List: Print the Elements [JavaScript]

Problem - https://www.hackerrank.com/challenges/print-the-elements-of-a-linked-list
Solution - print-the-elements-of-a-linked-list.js

Linked Lists: Insert element at the tall [JavaScript]

Problem - https://www.hackerrank.com/challenges/insert-a-node-at-the-tail-of-a-linked-list
Solution - insert-a-node-at-the-tail-of-a-linked-list.js

Linked List: Inesrt Element at the Head [JavaScript]

Problem - https://www.hackerrank.com/challenges/insert-a-node-at-the-head-of-a-linked-list
Solution - insert-a-node-at-the-head-of-a-linked-list.js

Linked List: Insert Element at Specific Position [JavaScript]

Linked List: Delete A Node [JavaScript]

Problem - https://www.hackerrank.com/challenges/delete-a-node-from-a-linked-list
Solution - delete-a-node-from-a-linked-list.js

Linked List: Print in reverse [JavaScript]

Linked List: Reverse [JavaScript]

Problem - https://www.hackerrank.com/challenges/reverse-a-linked-list
Solution - reverse-a-linked-list.js

Linked List: Compare [JavaScript]

Problem - https://www.hackerrank.com/challenges/compare-two-linked-lists
Solution - compare-two-linked-lists.js

Linked List: Merge two sorted Linked List [JavaScript]

Problem - https://www.hackerrank.com/challenges/merge-two-sorted-linked-lists
Solution - merge-two-sorted-linked-lists.js

Linked List: Get value at specific position from the tail [JavaScript]

Linked List: Delete Duplicated Value from a sorted linked list [JavaScript]

Linked List: Detect Whether a Linked List Contains a Cycle [C++]

Linked List: Find Merge Point [C++]

Doubly Linked List:

Doubly Linked List: Insert a Node [JavaScript]

Doubly Linked List: Reverse [Python]

Problem - https://www.hackerrank.com/challenges/reverse-a-doubly-linked-list
Solution - reverse-a-doubly-linked-list.js

Tree:

Tree: Preorder Travelsal [Python]

Problem - https://www.hackerrank.com/challenges/tree-preorder-traversal
Solution - tree-preorder-traversal

Tree: Inorder Travelsal [Python]

Problem - https://www.hackerrank.com/challenges/tree-inorder-traversal
Solution - tree-inorder-traversal.py

Tree: Height of Binary Tree [Python]

Problem - https://www.hackerrank.com/challenges/tree-height-of-a-binary-tree
Solution - tree-height-of-a-binary-tree.py

Medium

Sparse Arrays [Go]

Problem - https://www.hackerrank.com/challenges/sparse-arrays
Solution - sparse-arrays.go

Detect Whether a Linked List Contains a Cycle [C++]

Non Divisible Subset [JavaScript]

Problem - https://www.hackerrank.com/challenges/non-divisible-subset
Solution - non-divisible-subset.js

Extra Long Factoriqal [Go]

Problem - https://www.hackerrank.com/challenges/extra-long-factorials
Solution - extra-long-factorials.go

Forming a Magic Square [JavaScript]

Problem - https://www.hackerrank.com/challenges/magic-square-forming/problem
Solution - magic-square-forming.js

Climbing The Leaderboard [JavaSCript]

Problem - https://www.hackerrank.com/challenges/climbing-the-leaderboard
Solution - climbing-the-leaderboard.js

Organizing Containers of Balls [Python]

Problem - https://www.hackerrank.com/challenges/organizing-containers-of-balls/submissions/code/86847139

Organizing Containers of Balls [Python]

Problem - https://www.hackerrank.com/challenges/organizing-containers-of-balls/problem)
Solution - organizing-containers-of-balls.py

Encryption [Python]

Problem - https://www.hackerrank.com/challenges/encryption/problem
Solution - encryption.py

Queen's Attack II [Python]

Problem - https://www.hackerrank.com/challenges/queens-attack-2/problem
Solution - queens-attack-2.py

Hard

Crush [JavaScript]

Problem - https://www.hackerrank.com/challenges/crush
Solution - crush.js

Name		Name	Last commit message	Last commit date
Latest commit History 14 Commits
2d-array.go		2d-array.go
README.md		README.md
a-very-big-sum.js		a-very-big-sum.js
array-left-rotation.go		array-left-rotation.go
arrays-ds.go		arrays-ds.go
circular-array-rotation.go		circular-array-rotation.go
climbing-the-leaderboard.js		climbing-the-leaderboard.js
compare-the-triplets.js		compare-the-triplets.js
compare-two-linked-lists.js		compare-two-linked-lists.js
crush.js		crush.js
delete-a-node-from-a-linked-list.js		delete-a-node-from-a-linked-list.js
delete-duplicate-value-nodes-from-a-sorted-linked-list.js		delete-duplicate-value-nodes-from-a-sorted-linked-list.js
designer-pdf-viewer.go		designer-pdf-viewer.go
detect-whether-a-linked-list-contains-a-cycle.cpp		detect-whether-a-linked-list-contains-a-cycle.cpp
dynamic-array.go		dynamic-array.go
encryption.py		encryption.py
extra-long-factorials.go		extra-long-factorials.go
find-the-merge-point-of-two-joined-linked-lists.cpp		find-the-merge-point-of-two-joined-linked-lists.cpp
get-the-value-of-the-node-at-a-specific-position-from-the-tail.js		get-the-value-of-the-node-at-a-specific-position-from-the-tail.js
insert-a-node-at-a-specific-position-in-a-linked-list.js		insert-a-node-at-a-specific-position-in-a-linked-list.js
insert-a-node-at-the-head-of-a-linked-list.js		insert-a-node-at-the-head-of-a-linked-list.js
insert-a-node-at-the-tail-of-a-linked-list.js		insert-a-node-at-the-tail-of-a-linked-list.js
insert-a-node-into-a-sorted-doubly-linked-list.js		insert-a-node-into-a-sorted-doubly-linked-list.js
insertionsort1.js		insertionsort1.js
insertionsort2.js		insertionsort2.js
magic-square-forming.js		magic-square-forming.js
merge-two-sorted-linked-lists.js		merge-two-sorted-linked-lists.js
mini-max-sum.go		mini-max-sum.go
non-divisible-subset.js		non-divisible-subset.js
organizing-containers-of-balls.py		organizing-containers-of-balls.py
package main.go		package main.go
plus-minus.go		plus-minus.go
print-the-elements-of-a-linked-list-in-reverse.js		print-the-elements-of-a-linked-list-in-reverse.js
print-the-elements-of-a-linked-list.js		print-the-elements-of-a-linked-list.js
queens-attack-2.py		queens-attack-2.py
quicksort1.js		quicksort1.js
reverse-a-doubly-linked-list.js		reverse-a-doubly-linked-list.js
reverse-a-linked-list.js		reverse-a-linked-list.js
runningtime.js		runningtime.js
simple-array-sum.js		simple-array-sum.js
sparse-arrays.go		sparse-arrays.go
staircase.go		staircase.go
time-conversion.go		time-conversion.go
tree-height-of-a-binary-tree.py		tree-height-of-a-binary-tree.py
tree-inorder-traversal.py		tree-inorder-traversal.py
tree-preorder-traversal.py		tree-preorder-traversal.py
tutorial-intro.go		tutorial-intro.go

Aminadav/HackerRank

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HackerRank

Algorithms

Easy

Simple Array Sum [JavaScript]

Compare the Triplets [JavaScript]

A Very Big Sum [JavaScript]

Diagonal Difference [Go]

Plus Minus [Go]

Staircase [Go]

Mini Max Sum [Go]

Time Conversion [Go]

Designer PDF Viewer [Go]

Circular Array Rotation [Go]

Tutorial Intro [Go]

Insertion Sort Part I [JavaScript]

Insertion Sort Part II [JavaScript]

Running time of Alogirthm [JavaScript]

Quicksort

Data Structure

Array:

Array [Go]

2D Array [Go]

Dynamic Array [Go]

Array Left Rotation [Go]

Sparse Arrays [Go]

Crush [JavaScript]

Linked List:

Linked List: Print the Elements [JavaScript]

Linked Lists: Insert element at the tall [JavaScript]

Linked List: Inesrt Element at the Head [JavaScript]

Linked List: Insert Element at Specific Position [JavaScript]

Linked List: Delete A Node [JavaScript]

Linked List: Print in reverse [JavaScript]

Linked List: Reverse [JavaScript]

Linked List: Compare [JavaScript]

Linked List: Merge two sorted Linked List [JavaScript]

Linked List: Get value at specific position from the tail [JavaScript]

Linked List: Delete Duplicated Value from a sorted linked list [JavaScript]

Linked List: Detect Whether a Linked List Contains a Cycle [C++]

Linked List: Find Merge Point [C++]

Doubly Linked List:

Doubly Linked List: Insert a Node [JavaScript]

Doubly Linked List: Reverse [Python]

Tree:

Tree: Preorder Travelsal [Python]

Tree: Inorder Travelsal [Python]