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6 kyu
Two Sum
89,273wthit56
Arrays
Fundamentals
Algorithms
6 kyu
Matrix Rotation
490cyril-lemaire
Matrix
Fundamentals
6 kyu
Longest palindrome
1,435georgesykes86
Arrays
Strings
Algorithms
6 kyu
Linked Lists - Insert Nth Node
2,896JDeBolt
Linked Lists
Data Structures
Fundamentals
6 kyu
Linked Lists - Iterative Reverse
588JDeBolt
Linked Lists
Data Structures
Algorithms
6 kyu
Linked Lists - Remove Duplicates
2,385JDeBolt
Linked Lists
Data Structures
Fundamentals
7 kyu
Find the K-th last element of a singly linked list
434SergiuB
Linked Lists
Lists
Data Structures
Fundamentals
7 kyu
Linked Lists - Get Nth Node
6,138JDeBolt
Linked Lists
Data Structures
Fundamentals
6 kyu
Linked Lists - Length & Count
10,487JDeBolt
Linked Lists
Data Structures
Fundamentals
7 kyu
Merge two arrays
4,796billfero
Fundamentals
Arrays
7 kyu
Reverse a Number
14,441MattWatt
Algorithms
Fundamentals
5 kyu
Binary search tree validation
1,010plastic
Trees
Recursion
Data Structures
Algorithms
6 kyu
Is a number prime?
118,003arithmetric
Mathematics
Algorithms
6 kyu
Group Anagrams
1,367dulaccc
Algorithms
Data Structures
5 kyu
Conway's Game of Life
2,357ssineriz
Games
Graphics
Puzzles
Cellular Automata
7 kyu
Fizz / Buzz
4,219ztbrown
Mathematics
Algorithms
6 kyu
Fizz Buzz Reloaded
359the_Hamster
Fundamentals
6 kyu
Singly Linked List - Swap Nodes
119cyril-lemaire
Linked Lists
Fundamentals
Algorithms
6 kyu
Vending Machine
878adrian.eyre
Arrays
Fundamentals
6 kyu
Maze Runner
7,872adrian.eyre
Arrays
Fundamentals
5 kyu
Binary Tree Traversal
2,288Ban-Ath
Binary Trees
Trees
Recursion
Data Structures
Algorithms
5 kyu
Human Readable Time
151,830BattleRattle
Date Time
Mathematics
Algorithms
4 kyu
Snail
80,559stevenbarragan
Arrays
Algorithms
5 kyu
Vector class
8,869eugene-bulkin
Object-oriented Programming
Algorithms
Linear Algebra
6 kyu
Prime Word
563sazzadshopno
Fundamentals
5 kyu
Find the smallest
5,927g964
Fundamentals
6 kyu
Moves in squared strings (II)
5,070g964
Algorithms
Strings
6 kyu
Kata 2019: Combine Fruits
198myjinxin2015
Algorithms
Performance
5 kyu
Coding with Squared Strings
2,134g964
Fundamentals
Strings
Ciphers
Cryptography
5 kyu
Topological Sort
65brickshot
Algorithms
Graph Theory
Sorting
6 kyu
Word Mesh
1,710rt-hawk
Regular Expressions
Arrays
Strings
Fundamentals
6 kyu
Simple Web Framework #1: Create a basic router
1,628int3_0xcc
Object-oriented Programming
Arrays
Fundamentals