HackerRank

My solutions to exercises at https://hackerrank.com.

This is my profile there: https://www.hackerrank.com/jonasraoni :)

These are my own implementations, everything should be running fast enough to pass through all tests. As I enjoy small and concise codes, whatever doesn't fit in this rule means that I've suffered or didn't have enough knowledge 😂

Note: Few codes were solved in C# (I've written them a long time ago), I'll convert to JS when I get some free time, just to keep the repository uniform.

Algorithms

Bit Manipulation

• Flipping Bits
• Lonely Integer

Constructive Algorithms

• New Year Chaos

Graph Theory

• Snakes and Ladders: The Quickest Way Up

Greedy

• Greedy Florist
• Luck Balance
• Max Min
• Mark And Toys
• Minimum Absolute Difference In An Array
• Reverse Shuffle Merge
• Sherlock and The Beast

Implementation

• Counting Valleys
• Grading Students
• Jumping On The Clouds
• Repeated String
• Sales By Match

Sorting

• Connected Cells in a Grid
• Ice Cream Parlor
• Pairs
• Sherlock and Array

Sorting

• Fraudulent Activity Notifications

Strings

• Alternating Characters
• Circular Palindromes
• Common Child
• Sherlock And The Valid String
• Sherlock And Anagrams
• Two Strings

Warmup

• A Very Big Sum
• Birthday Cake Candles
• Compare The Triplets
• Diagonal Difference
• Mini-Max Sum
• Plus Minus
• Simple Array Sum
• Staircase
• Time Conversion

Challenges

• Count Triplets
• Frequency Queries
• Friend Circle Queries
• Max Array Sum
• Minimum Swaps 2
• Minimum Time Required
• Special String Again
• Triple Sum

Data Structures

Arrays

• Arrays - DS
• 2D Array - DS
• Array Manipulation
• Dynamic Array
• Left Rotation
• Sparse Arrays

Linked Lists

• Find Merge Point Of Two Lists
• Insert A Node At A Specific Position In A Linked List
• Inserting a Node Into a Sorted Doubly Linked List
• Reverse A Doubly Linked List

Stacks

• Balanced Brackets
• Maximum Element

Trees

• Binary Search Tree : Lowest Common Ancestor
• Swap Nodes [Algo]
• Tree: Height of a Binary Tree

Functional Programming

• Solve Me First FP

Introduction

Mathematics

Fundamentals

• Army Game
• Best Divisor
• Connecting Towns
• Cutting Paper Squares
• Sherlock and Divisors
• Filling Jars
• Find the Point
• Halloween Party
• Handshake
• Is Fibo
• Leonardo's Prime Factors
• Maximum Draws
• Minimum Height Triangle
• Most Distant
• Restaurant
• Reverse Game
• Sherlock and Moving Tiles
• Sumar and the Floating Rocks
• Summing the N Series
• Strange Grid

Number Theory

• Constructing a Number
• Sherlock and GCD

Tutorials

Cracking The Code Interview

• Arrays: Left Rotation
• Hash Tables: Ice Cream Parlor
• Hash Tables: Ransom Note Solution
• Linked Lists: Detect a Cycle
• Merge Sort: Counting Inversions
• Recursion: Fibonacci Numbers
• Sorting: Bubble Sort
• Sorting: Comparator
• Strings: Making Anagrams
• Time Complexity: Primality