Employers: discover CodinGame for tech hiring
EVENTS
UPCOMING
PAST
PRIVATE EVENTS
SOLO
PUZZLES
CODE GOLF
OPTIMIZATION
MULTI
LEADERBOARDS
CLASH OF CODE
BOT PROGRAMMING
CODING ESCAPE
COMMUNITY
CONTRIBUTIONS
LEARN
DISCORD
FORUM
LIVE STREAMS
1
Log In
Sign Up
Puzzles
Classic Puzzle - Hard
To start
The Labyrinth
XP
+250 XP
Completed by 8,198 CodinGamers
0
done
Death First Search - Episode 2
Death First Search - Episode 2
XP
+250 XP
Completed by 6,941 CodinGamers
0
done
The Bridge
XP
+375 XP
Completed by 3,646 CodinGamers
0
done
Winamax Sponsored Contest
XP
+250 XP
Completed by 2,065 CodinGamers
0
done
Don't Panic - Episode 2
XP
+250 XP
Completed by 1,572 CodinGamers
0
done
Vox Codei - Episode 1
XP
+250 XP
Completed by 2,495 CodinGamers
0
done
Super Computer
XP
+250 XP
Completed by 5,162 CodinGamers
0
done
Roller Coaster
XP
+375 XP
Completed by 6,973 CodinGamers
0
done
Surface
XP
+250 XP
Completed by 4,860 CodinGamers
0
done
CGX Formatter
XP
+250 XP
Completed by 4,321 CodinGamers
0
done
Power of Thor - Episode 2
XP
+250 XP
Completed by 1,844 CodinGamers
0
done
There is no Spoon - Episode 2
XP
+250 XP
Completed by 1,526 CodinGamers
0
done
The Fall - Episode 2
The Fall - Episode 2
XP
+250 XP
Completed by 1,260 CodinGamers
0
done
TAN Network
XP
+250 XP
Completed by 2,563 CodinGamers
0
done
Genome Sequencing
XP
+250 XP
Completed by 4,062 CodinGamers
0
done
Blunder - Episode 2
Blunder - Episode 2
XP
+250 XP
Completed by 3,383 CodinGamers
0
done
Blunder - Episode 3
Blunder - Episode 3
XP
+250 XP
Completed by 2,113 CodinGamers
0
done
Puzzle of the Week
Let's make a cheap ASCII 3D engine!
by pardouin
Let's make a cheap ASCII 3D engine!
XP
+50 XP
Completed by 142 CodinGamers
0
done
Rummikub 2
by jddingemanse
Rummikub 2
XP
+50 XP
Completed by 19 CodinGamers
0
done
Tetris Floor
by cedricdd
Tetris Floor
XP
+50 XP
Completed by 19 CodinGamers
0
done
Mrs. Knuth - Part III
by Timinator
Mrs. Knuth - Part III
XP
+50 XP
Completed by 11 CodinGamers
0
done
Fold and cut
by NicknamedTwice
Fold and cut
XP
+50 XP
Completed by 16 CodinGamers
0
done
Simple Pascal (PL/0) Compiler
by JDOnline
Simple Pascal (PL/0) Compiler
XP
+50 XP
Completed by 13 CodinGamers
0
done
Breaking Bifid
by therealbeef
Breaking Bifid
XP
+50 XP
Completed by 40 CodinGamers
0
done
Mind Cracker
by Humanosaure
Mind Cracker
XP
+50 XP
Completed by 31 CodinGamers
0
done
Sokoban
by eulerscheZahl
Sokoban
XP
+50 XP
Completed by 131 CodinGamers
0
done
Derivative time !!! - part2
by pluieciel
Derivative time !!! - part2
XP
+50 XP
Completed by 44 CodinGamers
0
done
Advertisements
by jddingemanse
Advertisements
XP
+50 XP
Completed by 26 CodinGamers
0
done
Solve for X
by Timinator
Solve for X
XP
+50 XP
Completed by 28 CodinGamers
0
done
Picture Puzzle
by Teiglin
Picture Puzzle
XP
+50 XP
Completed by 49 CodinGamers
0
done
String Balls II
by Timinator
String Balls II
XP
+50 XP
Completed by 25 CodinGamers
0
done
Kakuro Solver
by Q12
Kakuro Solver
XP
+50 XP
Completed by 86 CodinGamers
0
done
Killer Sudoku Extreme Challenge
by Timinator
Killer Sudoku Extreme Challenge
XP
+50 XP
Completed by 29 CodinGamers
0
done
The flight of birds
by Sirios
The flight of birds
XP
+50 XP
Completed by 13 CodinGamers
0
done
M.A.R.I. and the crazy factory
by nicola
M.A.R.I. and the crazy factory
XP
+50 XP
Completed by 26 CodinGamers
0
done
Conditional probabilities
by nicola
Conditional probabilities
XP
+50 XP
Completed by 57 CodinGamers
0
done
Nonogram inversor
by LaurentBouvier
Nonogram inversor
XP
+50 XP
Completed by 129 CodinGamers
0
done
The Hidden Fortress
by pardouin
The Hidden Fortress
XP
+50 XP
Completed by 292 CodinGamers
0
done
The Burglar's Dilemna
by [CG]Keelhaul
The Burglar's Dilemna
XP
+50 XP
Completed by 248 CodinGamers
0
done
Map Colorations
by DPAmar
Map Colorations
XP
+50 XP
Completed by 67 CodinGamers
0
done
Obsolete Programming
by Zorg1
Obsolete Programming
XP
+50 XP
Completed by 368 CodinGamers
0
done
Who Dunnit?
by David Augusto Villa
Who Dunnit?
XP
+50 XP
Completed by 17 CodinGamers
0
done
8086 Assembler, part I
by JDOnline
8086 Assembler, part I
XP
+50 XP
Completed by 20 CodinGamers
0
done
Takuzu Solver
by vinc-r
Takuzu Solver
XP
+50 XP
Completed by 101 CodinGamers
0
done
DAWG
by Westicles
DAWG
XP
+50 XP
Completed by 62 CodinGamers
0
done
Strobogrammatic Numbers
by undefined
Strobogrammatic Numbers
XP
+50 XP
Completed by 46 CodinGamers
0
done
Einstein's riddle solver
by OroshiX
Einstein's riddle solver
XP
+50 XP
Completed by 210 CodinGamers
0
done
ASCII Art QR code
by Eulero314
ASCII Art QR code
XP
+50 XP
Completed by 72 CodinGamers
0
done
Can you save the forest - Episode 2
by chabes
Can you save the forest - Episode 2
XP
+50 XP
Completed by 12 CodinGamers
0
done
Factorials of primes decomposition
by nicola
Factorials of primes decomposition
XP
+50 XP
Completed by 221 CodinGamers
0
done
Hexagonal Maze - part2
by Remi.
Hexagonal Maze - part2
XP
+50 XP
Completed by 81 CodinGamers
0
done
Her Majesty's well shared secret
by Niako
Her Majesty's well shared secret
XP
+50 XP
Completed by 99 CodinGamers
0
done
Thomas and the Freight Cars
by java_coffee_cup
Thomas and the Freight Cars
XP
+50 XP
Completed by 278 CodinGamers
0
done
11-puzzle
by [CG]Maxime
11-puzzle
XP
+50 XP
Completed by 194 CodinGamers
0
done
Zergling rush
by ValNykol
Zergling rush
XP
+50 XP
Completed by 677 CodinGamers
0
done
24: The Long Game
by jddingemanse
24: The Long Game
XP
+50 XP
Completed by 27 CodinGamers
0
done
Simon's Oracle
by David Augusto Villa
Simon's Oracle
XP
+50 XP
Completed by 12 CodinGamers
0
done
Mars Colonization
by java_coffee_cup
Mars Colonization
XP
+50 XP
Completed by 198 CodinGamers
0
done
Chess cavalry
by Arglanir
Chess cavalry
XP
+50 XP
Completed by 712 CodinGamers
0
done
Blockout
by eulerscheZahl
Blockout
XP
+50 XP
Completed by 14 CodinGamers
0
done
N Pearls Necklace
by pardouin
N Pearls Necklace
XP
+50 XP
Completed by 25 CodinGamers
0
done
Turing machine
by ValNykol
Turing machine
XP
+50 XP
Completed by 693 CodinGamers
0
done
Cubax Folding
by masterglob
Cubax Folding
XP
+50 XP
Completed by 90 CodinGamers
0
done
Magic count of numbers
by InstouT94
Magic count of numbers
XP
+50 XP
Completed by 483 CodinGamers
0
done
The Total is Right - Weird edition
by Alain-Delpuch
The Total is Right - Weird edition
XP
+50 XP
Completed by 285 CodinGamers
0
done
Fractal Carpet
by Sethius
Fractal Carpet
XP
+50 XP
Completed by 558 CodinGamers
0
done
Paper-folding curve
by java_coffee_cup
Paper-folding curve
XP
+50 XP
Completed by 510 CodinGamers
0
done
SHA-256 Hash
by schachmatt
SHA-256 Hash
XP
+50 XP
Completed by 157 CodinGamers
0
done
The Empire Enigma
by ReMoD
The Empire Enigma
XP
+50 XP
Completed by 245 CodinGamers
0
done
Detective Pikaptcha EP4
by java_coffee_cup
Detective Pikaptcha EP4
XP
+50 XP
Completed by 203 CodinGamers
0
done
Doubly solved Rubik's cube
by icecuber
Doubly solved Rubik's cube
XP
+50 XP
Completed by 114 CodinGamers
0
done
Breakout
by player_one
Breakout
XP
+50 XP
Completed by 84 CodinGamers
0
done
A Man with a Plan
by undefined
A Man with a Plan
XP
+50 XP
Completed by 84 CodinGamers
0
done
Cloudy Weather
by Niako
Cloudy Weather
XP
+50 XP
Completed by 73 CodinGamers
0
done
Chess board analyzer
by Di_Masta
Chess board analyzer
XP
+50 XP
Completed by 461 CodinGamers
0
done
Apple tree
by input.txt
Apple tree
XP
+50 XP
Completed by 797 CodinGamers
0
done
A Game of Go
by Tux4711
A Game of Go
XP
+50 XP
Completed by 237 CodinGamers
0
done
Grid climbing
by Rafarafa
Grid climbing
XP
+50 XP
Completed by 58 CodinGamers
0
done
The Balanced Centrifuge Problem
by magaiti
The Balanced Centrifuge Problem
XP
+50 XP
Completed by 130 CodinGamers
0
done
Encounter surface
by BLANC
Encounter surface
XP
+50 XP
Completed by 144 CodinGamers
0
done
X egg problem
by Romario
X egg problem
XP
+50 XP
Completed by 225 CodinGamers
0
done
Jump Point Search - Preprocessing
by aCat
Jump Point Search - Preprocessing
XP
+50 XP
Completed by 102 CodinGamers
0
done
Laser and mirrors
by Arglanir
Laser and mirrors
XP
+50 XP
Completed by 369 CodinGamers
0
done
Misère Nim
by magaiti
Misère Nim
XP
+50 XP
Completed by 159 CodinGamers
0
done
The hungry duck - part 2
by schubc
The hungry duck - part 2
XP
+50 XP
Completed by 843 CodinGamers
0
done
Neighbor-Sum Grids
by Niako
Neighbor-Sum Grids
XP
+50 XP
Completed by 93 CodinGamers
0
done
Harmless Rooks
by Niako
Harmless Rooks
XP
+50 XP
Completed by 98 CodinGamers
0
done
Mini sudoku solver
by nicola
Mini sudoku solver
XP
+50 XP
Completed by 1,028 CodinGamers
0
done
Maximising integers
by SubwayMan
Maximising integers
XP
+50 XP
Completed by 157 CodinGamers
0
done
Dumbbells solver
by VilBoub
Dumbbells solver
XP
+50 XP
Completed by 158 CodinGamers
0
done
Cryptarithm
by Bob
Cryptarithm
XP
+50 XP
Completed by 498 CodinGamers
0
done
Gerrymandering
by MathisHammel
Gerrymandering
XP
+50 XP
Completed by 255 CodinGamers
0
done
Counter Attack
by The Capra Aegagrus Hircus 2000
Counter Attack
XP
+50 XP
Completed by 20 CodinGamers
0
done
Sliding Maze Puzzle
by pardouin
Sliding Maze Puzzle
XP
+50 XP
Completed by 20 CodinGamers
0
done
Max Rect
by java_coffee_cup
Max Rect
XP
+50 XP
Completed by 401 CodinGamers
0
done
Closest Number
by Nagrarok
Closest Number
XP
+50 XP
Completed by 138 CodinGamers
0
done
Boggle
by Bob
Boggle
XP
+50 XP
Completed by 549 CodinGamers
0
done
Cheat Solving
by JBM
Cheat Solving
XP
+50 XP
Completed by 222 CodinGamers
0
done
Binary neural network - Part 1
by player_one
Binary neural network - Part 1
XP
+50 XP
Completed by 182 CodinGamers
0
done
To Sky's Edge
by [CG]Keelhaul
To Sky's Edge
XP
+50 XP
Completed by 365 CodinGamers
0
done
Staircases
by sampriti
Staircases
XP
+50 XP
Completed by 655 CodinGamers
0
done
Erdős Number
by Delgan
Erdős Number
XP
+50 XP
Completed by 213 CodinGamers
0
done
Vortex
by MadKnight
Vortex
XP
+50 XP
Completed by 419 CodinGamers
0
done
Binary Extension
by mouton5000
Binary Extension
XP
+50 XP
Completed by 66 CodinGamers
0
done
Order of Oopserations!
by Stashio
Order of Oopserations!
XP
+50 XP
Completed by 272 CodinGamers
0
done
Three little piggies
by nicola
Three little piggies
XP
+50 XP
Completed by 48 CodinGamers
0
done
Binary Permutations
by TheNinja
Binary Permutations
XP
+50 XP
Completed by 325 CodinGamers
0
done
Monte Carlo Tree Search exercise
by aCat
Monte Carlo Tree Search exercise
XP
+50 XP
Completed by 209 CodinGamers
0
done
Castle Siege
by TheNinja
Castle Siege
XP
+50 XP
Completed by 336 CodinGamers
0
done
Discrete Log Problem
by Maurice_Moss
Discrete Log Problem
XP
+50 XP
Completed by 108 CodinGamers
0
done
Hitori solver
by VilBoub
Hitori solver
XP
+50 XP
Completed by 141 CodinGamers
0
done
Kolakoski Sequence
by Orabig
Kolakoski Sequence
XP
+50 XP
Completed by 787 CodinGamers
0
done
MAGICAL FROG
by berqiamouad
MAGICAL FROG
XP
+50 XP
Completed by 22 CodinGamers
0
done
Flower beds
by Fluxor
Flower beds
XP
+50 XP
Completed by 133 CodinGamers
0
done
Longest Palindrome
by Maurice_Moss
Longest Palindrome
XP
+50 XP
Completed by 833 CodinGamers
0
done
Electrical grid
by qsantos
Electrical grid
XP
+50 XP
Completed by 312 CodinGamers
0
done
Dominoes solver
by VilBoub
Dominoes solver
XP
+50 XP
Completed by 154 CodinGamers
0
done
Parsing context-free grammar
by aCat
Parsing context-free grammar
XP
+50 XP
Completed by 117 CodinGamers
0
done
Connect four
by Bob
Connect four
XP
+50 XP
Completed by 415 CodinGamers
0
done
Execution Circle
by Skreamly
Execution Circle
XP
+50 XP
Completed by 286 CodinGamers
0
done
Hill Notation and Hill Order
by btharper
Hill Notation and Hill Order
XP
+50 XP
Completed by 265 CodinGamers
0
done
The hungry duck - part 1
by schubc
The hungry duck - part 1
XP
+50 XP
Completed by 1,079 CodinGamers
0
done
Sum of odd
by dwarfie
Sum of odd
XP
+50 XP
Completed by 238 CodinGamers
0
done
Hit the road
by mouton5000
Hit the road
XP
+50 XP
Completed by 197 CodinGamers
0
done
The Beautiful sequence
by dogther
The Beautiful sequence
XP
+50 XP
Completed by 249 CodinGamers
0
done
Legendary Archer Octavius
by UnicornP
Legendary Archer Octavius
XP
+50 XP
Completed by 23 CodinGamers
0
done
The Holy Grail
by Blem
The Holy Grail
XP
+50 XP
Completed by 506 CodinGamers
0
done
CG Chat Interpreter
by player_one
CG Chat Interpreter
XP
+50 XP
Completed by 118 CodinGamers
0
done
Chess moves on FEN position
by scrauler
Chess moves on FEN position
XP
+50 XP
Completed by 322 CodinGamers
0
done
Spreadsheet Labels
by Porthos3
Spreadsheet Labels
XP
+50 XP
Completed by 689 CodinGamers
0
done
Pascal Trapezoid
by player_one
Pascal Trapezoid
XP
+50 XP
Completed by 140 CodinGamers
0
done
Mystery sums
by Neonox
Mystery sums
XP
+50 XP
Completed by 550 CodinGamers
0
done
Levenshtein distance
by Steuh
Levenshtein distance
XP
+50 XP
Completed by 642 CodinGamers
0
done
Wave Function Collapse (sans Shannon)
by Wontonimo
Wave Function Collapse (sans Shannon)
XP
+50 XP
Completed by 28 CodinGamers
0
done
Elevator
by dimpopo
Elevator
XP
+50 XP
Completed by 1,161 CodinGamers
0
done
Simple CPU Emulation 1
by SunMan
Simple CPU Emulation 1
XP
+50 XP
Completed by 696 CodinGamers
0
done
Horn-SAT solver
by ludowsky
Horn-SAT solver
XP
+50 XP
Completed by 115 CodinGamers
0
done
Balanced Levers
by java_coffee_cup
Balanced Levers
XP
+50 XP
Completed by 25 CodinGamers
0
done
Symbolic system of equations
by izanbf
Symbolic system of equations
XP
+50 XP
Completed by 97 CodinGamers
0
done
Jump Point Search - Runtime
by aCat
Jump Point Search - Runtime
XP
+50 XP
Completed by 66 CodinGamers
0
done
Hanoi tower
by Bob
Hanoi tower
XP
+50 XP
Completed by 527 CodinGamers
0
done
TXT2HTML
by Merome
TXT2HTML
XP
+50 XP
Completed by 419 CodinGamers
0
done
Hangman
by [CPC]glau
Hangman
XP
+50 XP
Completed by 791 CodinGamers
0
done
n Queens
by VilBoub
n Queens
XP
+50 XP
Completed by 589 CodinGamers
0
done
Simple safecracking
by Shomz
Simple safecracking
XP
+50 XP
Completed by 1,488 CodinGamers
0
done
Universe Conquest
by Enygma
Universe Conquest
XP
+50 XP
Completed by 138 CodinGamers
0
done
Candies
by Elliot
Candies
XP
+50 XP
Completed by 586 CodinGamers
0
done
Google Interview - The Two Egg Problem
by [CG]OlogN
Google Interview - The Two Egg Problem
XP
+50 XP
Completed by 2,055 CodinGamers
0
done
KGood
by _NikJ
KGood
XP
+50 XP
Completed by 584 CodinGamers
0
done
Breaking Apart
by Gorbit99
Breaking Apart
XP
+50 XP
Completed by 69 CodinGamers
0
done
Code your own Automaton2000, step 1
by Magus
Code your own Automaton2000, step 1
XP
+50 XP
Completed by 189 CodinGamers
0
done
Rocket mice
by player_one
Rocket mice
XP
+50 XP
Completed by 96 CodinGamers
0
done
Simplify Selection Ranges
by xmetrix
Simplify Selection Ranges
XP
+50 XP
Completed by 1,906 CodinGamers
0
done
Divisibility of Fibonacci numbers sum
by OPi
Divisibility of Fibonacci numbers sum
XP
+50 XP
Completed by 113 CodinGamers
0
done
Alternative vote
by [CG]Maxime
Alternative vote
XP
+50 XP
Completed by 487 CodinGamers
0
done
Inertia ride
by [CG]Keelhaul
Inertia ride
XP
+50 XP
Completed by 414 CodinGamers
0
done
Expand the polynomial
by nicola
Expand the polynomial
XP
+50 XP
Completed by 681 CodinGamers
0
done
The max surface box
by VinceKanabo
The max surface box
XP
+50 XP
Completed by 553 CodinGamers
0
done
Nuggets numbers
by Thib34
Nuggets numbers
XP
+50 XP
Completed by 256 CodinGamers
0
done
Bailey–Borwein–Plouffe Pi
by Zenoscave
Bailey–Borwein–Plouffe Pi
XP
+50 XP
Completed by 70 CodinGamers
0
done
Drawing Polygons
by PauloVilela
Drawing Polygons
XP
+50 XP
Completed by 417 CodinGamers
0
done
7-segment display
by scrauler
7-segment display
XP
+50 XP
Completed by 1,016 CodinGamers
0
done
Adversarial Mate with Rook
by aCat
Adversarial Mate with Rook
XP
+50 XP
Completed by 18 CodinGamers
0
done
The Highest Building
by Konrad_Wer
The Highest Building
XP
+50 XP
Completed by 421 CodinGamers
0
done
CG's Next Top Model
by Wontonimo
CG's Next Top Model
XP
+50 XP
Completed by 35 CodinGamers
0
done
Tetris
by Bob
Tetris
XP
+50 XP
Completed by 216 CodinGamers
0
done
The greatest number
by Magus
The greatest number
XP
+50 XP
Completed by 3,556 CodinGamers
0
done
Egyptian multiplication
by MoonCoder
Egyptian multiplication
XP
+50 XP
Completed by 901 CodinGamers
0
done
Musical Intervals
by JBM
Musical Intervals
XP
+50 XP
Completed by 143 CodinGamers
0
done
Snooker Ball Collision
by Loufouh
Snooker Ball Collision
XP
+50 XP
Completed by 36 CodinGamers
0
done
🃏 FreeCell 🃏
by JBM
🃏 FreeCell 🃏
XP
+50 XP
Completed by 6 CodinGamers
0
done
Wall Street
by MasterJos
Wall Street
XP
+50 XP
Completed by 168 CodinGamers
0
done
Pedestrian Traffic
by tobakudan
Pedestrian Traffic
XP
+50 XP
Completed by 27 CodinGamers
0
done
Test before Validate!
by bloublou
Test before Validate!
XP
+50 XP
Completed by 410 CodinGamers
0
done
Secret Message Decoding
by csKingBabar
Secret Message Decoding
XP
+50 XP
Completed by 14 CodinGamers
0
done
Basic Decision Tree - 1
by Wei-1
Basic Decision Tree - 1
XP
+50 XP
Completed by 93 CodinGamers
0
done
Basic Decision Tree - 2
by Wei-1
Basic Decision Tree - 2
XP
+50 XP
Completed by 39 CodinGamers
0
done
ABOUT US
CAREERS
PRIVACY
FAQ
BLOG
ABOUT US
CAREERS
PRIVACY
FAQ
BLOG
The #1 tech hiring platform
SCREENING
INTERVIEWING
Facebook
YouTube
Twitter
LinkedIn
FR
EN
