Codefights

A way to improve your programming skills.

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Arcade The Core

Intro Gates

  1. Add Two Digits
  2. Largest Number
  3. Candies
  4. Max Multiple
  5. Circle Of Numbers
  6. Late Ride
  7. Phone Call

At the Crossroads

  1. Reach Next Level
  2. Knapsack Light
  3. Extra Number
  4. Is Infinite Process
  5. Arithmetic Expression
  6. Tennis Set
  7. Will You?
  8. Metro Card

Corner of 0s and 1s

  1. Kill K-th Bit
  2. Array Packing
  3. Range Bit Count
  4. Mirror Bits
  5. Second-Rightmost Zero Bit
  6. Swap Adjacent Bits
  7. Different Rightmost Bit
  8. Equal Pair Of Bits

Loop Tunnel

  1. Least Factorial
  2. Count Sum Of Two Representations 2
  3. Magical Well
  4. Line Up
  5. Addition Without Carrying
  6. Apple Boxes
  7. Increase Number Roundness
  8. Rounders
  9. Candles
  10. Count Black Cells

List Forest Edge

  1. Create Array
  2. Array Replace
  3. First Reverse Try
  4. Concatenate Arrays
  5. Remove Array Part
  6. Is Smooth
  7. Replace Middle
  8. Make Array Consecutive 2

Labyrinth of Nested Loops

  1. Is Power
  2. Is Sum Of Consecutive 2
  3. Square Digits Sequence
  4. Pages Numbering With Ink
  5. Comfortable Numbers
  6. Weak Numbers
  7. Rectangle Rotation
  8. Crossword Formation

Book Market

  1. Enclose In Brackets
  2. Proper Noun Correction
  3. Is Tandem Repeat?
  4. Is Case-Insensitive Palindrome?
  5. Find Email Domain
  6. HTML End Tag By Start Tag
  7. Is MAC48 Address
  8. Is Unstable Pair?

Mirror Lake

  1. Strings Construction
  2. Is Substitution Cipher?
  3. Create Anagram
  4. Construct Square
  5. Numbers Grouping
  6. Different Squares
  7. Most Frequent Digit Sum
  8. Number Of Clans

Well of Integration

  1. House Numbers Sum
  2. All Longest Strings
  3. House Of Cats
  4. Alphabet Subsequence
  5. Minimal Number Of Coins
  6. Add Border
  7. Switch Lights
  8. Timed Reading
  9. Elections Winners
  10. Integer To String Of Fixed Width
  11. Are Similar
  12. Ada Number
  13. Three Split

Lab of Transformations

  1. Character Parity
  2. Reflect String
  3. New Numeral System
  4. Cipher 26
  5. Stolen Lunch
  6. Higher Version
  7. Decipher
  8. Alphanumeric Less

Spring of Integration

  1. Array Conversion
  2. Array Previous Less
  3. Pair Of Shoes
  4. Combs
  5. Strings Crossover
  6. Cyclic String
  7. Beautiful Text
  8. Runners Meetings
  9. Christmas Tree
  10. File Naming

List Backwoods

  1. Extract Matrix Column
  2. Are Isomorphic?
  3. Reverse On Diagonals
  4. Swap Diagonals
  5. Crossing Sum
  6. Draw Rectangle
  7. Volleyball Positions
  8. Star Rotation

Waterfall of Integration

  1. Sudoku
  2. Minesweeper
  3. Box Blur
  4. Contours Shifting
  5. Polygon Perimeter
  6. Gravitation
  7. Is Information Consistent
  8. Correct Nonogram

Sorting Outpost

  1. Shuffled Array
  2. Sort By Height
  3. Sort By Length
  4. Boxes Packing
  5. Maximum Sum
  6. Rows Rearranging
  7. Digit Difference Sort
  8. Unique Digit Products

Chess Tavern

  1. Bishop And Pawn
  2. Chess Knight Moves
  3. Bishop Diagonal
  4. Whose Turn
  5. Chess Bishop Dream
  6. Chess Triangle
  7. Amazon Checkmate
  8. Pawn Race

Time River

  1. Valid Time
  2. Video Part
  3. Day Of Week
  4. Curious Clock
  5. New Year Celebrations
  6. Regular Months
  7. Missed Classes
  8. Holiday