My collection of solutions for Codewars

1. Convert a string to an array - Solution
2. Convert a Number to a String! - Solution
3. altERnaTIng cAsE <=> ALTerNAtiNG CaSe - Solution
4. Sum of positive - Solution
5. Remove duplicates from list - Solution
6. Convert a String to a Number! - Solution
7. Do I get a bonus? - Solution
8. Total amount of points - Solution
9. Beginner - Lost Without a Map - Solution
10. Double Char - Solution
11. Reversed sequence - Solution
12. Fake Binary - Solution
13. Rock Paper Scissors! - Solution
14. Find Maximum and Minimum Values of a List - Solution
15. Reversed Strings - Solution
16. Square(n) Sum - Solution
17. Century From Year - Solution
18. Abbreviate a Two Word Name - Solution
19. Invert values - Solution
20. Calculate average - Solution
21. Jenny's secret message - Solution
22. Is n divisible by x and y? - Solution
23. Keep Hydrated! - Solution
24. A Needle in the Haystack - Solution
25. Sum without highest and lowest number - Solution
26. Convert number to reversed array of digits - Solution
27. Count of positives / sum of negatives - Solution
28. Convert boolean values to strings 'Yes' or 'No'. - Solution
29. Basic Mathematical Operations - Solution
30. Grasshopper - Summation - Solution
31. Counting sheep... - Solution
32. Remove String Spaces - Solution
33. Find the smallest integer in the array - Solution
34. Return Negative - Solution
35. String repeat - Solution
36. Remove First and Last Character - Solution
37. Opposite number - Solution
38. Multiply - Solution
39. Even or Odd - Solution
40. Online RPG: player to qualifying stage? - Solution
41. Who ate the cookie? - Solution
42. Miles per gallon to kilometers per liter - Solution
43. Enumerable Magic #3 - Does My List Include This? - Solution
44. Is this my tail? - Solution
45. Merge two sorted arrays into one - Solution
46. Count by X - Solution
47. Beginner - Reduce but Grow - Solution
48. Twice as old - Solution
49. Pillars - Solution
50. Sentence Smash - Solution
51. Sum Arrays - Solution
52. Volume of a Cuboid - Solution
53. Get Planet Name By ID - Solution
54. Sort and Star - Solution
55. Array plus array - Solution
56. Sum Mixed Array - Solution
57. Filter out the geese - Solution
58. To square(root) or not to square(root) - Solution
59. Removing Elements - Solution
60. Find numbers which are divisible by given number - Solution
61. I love you, a little , a lot, passionately ... not at all - Solution
62. My head is at the wrong end! - Solution
63. Count the Monkeys! - Solution
64. You only need one - Beginner - Solution
65. Get the mean of an array - Solution
66. Dollars and Cents - Solution
67. The 'if' function - Solution
68. Find out whether the shape is a cube - Solution
69. Greek Sort - Solution
70. Are You Playing Banjo? - Solution
71. You Can't Code Under Pressure #1 - Solution
72. Parse nice int from char problem - Solution
73. Opposites Attract - Solution
74. Is he gonna survive? - Solution
75. Geometry Basics: Distance between points in 2D - Solution
76. Points of Reflection - Solution
77. Geometry Basics: Circle Area in 2D - Solution
78. Geometry Basics: Circle Circumference in 2D - Solution
79. Surface Area and Volume of a Box - Solution
80. Generate user links - Solution
81. easy logs - Solution
82. Return Two Highest Values in List - Solution
83. Find the force of gravity between two objects - Solution
84. Enumerable Magic #30 - Split that Array! - Solution
85. Logical calculator - Solution
86. Is your period late? - Solution
87. A wolf in sheep's clothing - Solution
88. Crash Override - Solution
89. Sort My Textbooks - Solution
90. Multiplication table for number - Solution
91. Collatz Conjecture (3n+1) - Solution
92. Smallest unused ID - Solution
93. Parse float - Solution
94. Multiply the number - Solution
95. How good are you really? - Solution
96. Determine offspring sex based on genes XX and XY chromosomes - Solution
97. DNA to RNA Conversion - Solution
98. String cleaning - Solution
99. Beginner Series #1 School Paperwork - Solution
100. Beginner Series #4 Cockroach - Solution
101. Beginner Series #2 Clock - Solution
102. Invalid Login - Bug Fixing #11 - Solution
103. Switch/Case - Bug Fixing #6 - Solution
104. Bin to Decimal - Solution
105. Age Range Compatibility Equation - Solution
106. Heads and Legs - Solution
107. Who is going to pay for the wall? - Solution
108. Capitalization and Mutability - Solution
109. Returning Strings - Solution
110. 101 Dalmatians - squash the bugs, not the dogs! - Solution
111. Super Duper Easy - Solution
112. Training JS #32: methods of Math---round() ceil() and floor() - Solution
113. Thinkful - Number Drills: Pixelart planning - Solution
114. Thinkful - Logic Drills: Traffic light - Solution
115. Hello, Name or World! - Solution
116. Wilson primes - Solution
117. Exclamation marks series #6: Remove n exclamation marks in the sentence from left to right - Solution
118. How many stairs will Suzuki climb in 20 years? - Solution
119. A Strange Trip to the Market - Solution
120. Find the Integral - Solution
121. The Feast of Many Beasts - Solution
122. Remove exclamation marks - Solution
123. Reverse List Order - Solution
124. Function 2 - squaring an argument - Solution

1. Compare Strings by Sum of Chars - Solution
2. Recursive reverse string - Solution
3. Calculate mean and concatenate string - Solution
4. Partial Word Searching - Solution
5. SequenceSum - Solution
6. Highest and Lowest - Solution
7. Shortest Word - Solution
8. Complementary DNA - Solution
9. Convert a linked list to a string - Solution
10. Building Strings From a Hash - Solution
11. Return substring instance count - Solution
12. Fix string case - Solution
13. String Reversing, Changing case, etc. - Solution
14. Milk and Cookies for Santa - Solution
15. Square Every Digit - Solution
16. Disemvowel Trolls - Solution
17. You're a square! - Solution
18. Jaden Casing Strings - Solution
19. Beginner Series #3 Sum of Numbers - Solution
20. Growth of a Population - Solution
21. Find Duplicates - Solution
22. Sum of two lowest positive integers - Solution
23. Sums of consecutive integers - Solution
24. Sum of integers in string - Solution
25. Who's Online? - Solution
26. Largest 5 digit number in a series - Solution
27. Breaking chocolate problem - Solution
28. Odd or Even? - Solution
29. Find the stray number - Solution
30. Two fighters, one winner. - Solution
31. Don't give me five! - Solution
32. Sum of the first nth term of Series - Solution
33. Find the divisors! - Solution
34. Sum of odd numbers - Solution
35. Is this a triangle? - Solution
36. Credit Card Mask - Solution
37. List Filtering - Solution
38. Find the next perfect square! - Solution
39. Get the Middle Character - Solution
40. Mumbling - Solution
41. Vowel Count - Solution
42. Descending Order - Solution
43. Exes and Ohs - Solution
44. Averages of numbers - Solution
45. Summing a number's digits - Solution
46. Folding your way to the moon - Solution
47. Gauß needs help! (Sums of a lot of numbers). - Solution
48. Sorted? yes? no? how? - Solution
49. Triangular Treasure - Solution
50. Are the numbers in order? - Solution
51. Hero's root - Solution
52. Palindrome chain length - Solution
53. Make a function that does arithmetic! - Solution
54. Sort array by string length - Solution
55. Sum of a sequence - Solution
56. Two to One - Solution
57. Find divisors of a number - Solution
58. Find heavy ball - level: novice - Solution
59. Snail crawls up - Solution
60. Remove Duplicates - Solution
61. Remove duplicate words - Solution
62. Remove the minimum - Solution
63. Ones and Zeros - Solution
64. Strings: swap vowels' case - Solution
65. Weird words - Solution
66. Deletion in an array - Solution
67. A Rule of Divisibility by 7 - Solution
68. Is n divisible by (...)? - Solution
69. Calculate the resultant force - Solution
70. Simple consecutive pairs - Solution
71. Consecutive letters - Solution
72. Candy problem - Solution
73. Without the letter 'E' - Solution
74. Arithmetic sequence - sum of n elements - Solution
75. Printing Array elements with Comma delimiters - Solution
76. Two Oldest Ages - Solution
77. Find the middle element - Solution
78. Number Of Occurrences - Solution
79. Sum of numbers from 0 to N - Solution
80. Flatten - Solution
81. Figurate Numbers #2 - Pronic Number - Solution
82. Find the capitals - Solution
83. Determine if the poker hand is flush - Solution
84. Counting power sets - Solution
85. Debug the functions EASY - Solution
86. Regex validate PIN code - Solution
87. Functional Addition - Solution
88. Remove anchor from URL - Solution
89. Refactored Greeting - Solution
90. Digitize - Solution
91. Last - Solution
92. Sum of all arguments - Solution
93. Head, Tail, Init and Last - Solution
94. Unpacking Arguments - Solution
95. Monotone travel - Solution
96. List to Array - Solution
97. Find Count of Most Frequent Item in an Array - Solution
98. Simple string reversal II - Solution
99. String reverse slicing 101 - Solution
100. Principal Diagonal | VS | Secondary Diagonal - Solution
101. Find sum of top-left to bottom-right diagonals - Solution
102. Slope of a Line - Solution
103. Product of the main diagonal of a square matrix. - Solution
104. Holiday VIII - Duty Free - Solution
105. How Green Is My Valley? - Solution
106. Array Manipulation - Solution
107. Christmas baubles on the tree - Solution
108. Green Glass Door - Solution
109. Categorize New Member - Solution
110. Binary Addition - Solution
111. Printer Errors - Solution
112. Vowel remover - Solution
113. Simple remove duplicates - Solution
114. Sum of array singles - Solution
115. Isograms - Solution
116. The highest profit wins! - Solution
117. The Coins of Ter | Round to the Next N - Solution
118. A function within a function - Solution
119. Find the nth Digit of a Number - Solution
120. Nth Root of a Number - Solution
121. Simple beads count - Solution
122. Odd-Even String Sort - Solution
123. Even odd disparity - Solution
124. FIXME: Get Full Name - Solution
125. Float Precision - Solution

1. Linked Lists - Length & Count - Solution
2. Irreducible Sum of Rationals - Solution
3. Banker's Plan - Solution
4. Reducing by rules to get the result - Solution
5. Simple Encryption #1 - Alternating Split - Solution
6. longest_palindrome - Solution
7. Calculate String Rotation - Solution
8. Duplicate Encoder - Solution
9. Counting Duplicates - Solution
10. Multiples of 3 or 5 - Solution
11. Decode the Morse code - Solution
12. Persistent Bugger. - Solution
13. Find The Parity Outlier - Solution
14. Sum of Digits / Digital Root - Solution
15. Equal Sides Of An Array - Solution
16. Tribonacci Sequence - Solution
17. Stop gninnipS My sdroW! - Solution
18. WeIrD StRiNg CaSe - Solution
19. Convert string to camel case - Solution
20. Format words into a sentence - Solution
21. Playing with digits - Solution
22. Take a Ten Minute Walk - Solution
23. IQ Test - Solution
24. Who likes it? - Solution
25. Find the odd int - Solution
26. Your order, please - Solution
27. Does my number look big in this? - Solution
28. Look and say numbers - Solution
29. Unique In Order - Solution
30. Which are in? - Solution
31. Odd/Even number of divisors - Solution
32. up AND down - Solution
33. Financing Plan on Planet XY140Z-n - Solution
34. Highest Scoring Word - Solution
35. Linked Lists - Remove Duplicates - Solution
36. Simple Sentences - Solution
37. Word a10n (abbreviation) - Solution
38. Sort the odd - Solution
39. Find the unique number - Solution
40. Create Phone Number - Solution
41. Array.diff - Solution
42. Case Reversal of Consecutive Duplicates - Solution
43. Prefill an Array - Solution
44. A Rule of Divisibility by 13 - Solution
45. Fold an array - Solution
46. Sort the columns of a csv-file - Solution
47. Sum consecutives - Solution
48. Consecutive strings - Solution
49. Delete occurrences of an element if it occurs more than n times - Solution
50. XOR string reduction - Solution
51. Possibilities of throwing a coin n times - Solution
52. Two Sum - Solution
53. Custom Array Filters - Solution
54. Mexican Wave - Solution
55. Bit Counting - Solution
56. Hamming Distance - Solution
57. The Supermarket Queue - Solution
58. Binding within the List Monad - Solution
59. String average - Solution
60. Running Average - Solution
61. Positions Average - Solution
62. Street Fighter 2 - Character Selection - Solution
63. Matrix Addition - Solution
64. Find the Mine! - Solution
65. The Freeway Game - Solution
66. Binary Tree Compare - Solution
67. Vasya - Clerk - Solution
68. Find the missing letter - Solution
69. Valid Braces - Solution
70. Format a string of names like 'Bart, Lisa & Maggie'. - Solution
71. Replace With Alphabet Position - Solution
72. Build a pile of Cubes - Solution
73. Build Tower - Solution
74. Roman Numerals Encoder - Solution
75. Bouncing Balls - Solution
76. Give me a Diamond - Solution
77. Tortoise racing - Solution
78. Reverse or rotate? - Solution
79. IP Validation - Solution
80. Base Conversion - Solution
81. Split Strings - Solution
82. Triple trouble - Solution
83. Help the bookseller ! - Solution
84. Checking Groups - Solution
85. Length of missing array - Solution
86. Maze Runner - Solution
87. Valid Phone Number - Solution
88. Two Joggers - Solution
89. Coordinates Validator - Solution
90. Srot the inner ctonnet in dsnnieedcg oredr - Solution
91. Function Composition - Solution
92. extract file name - Solution
93. IPv4 to int32 - Solution
94. +1 Array - Solution
95. Parse HTML/CSS Colors - Solution
96. Design a Simple Automaton (Finite State Machine) - Solution
97. Calculating Batting Average - Solution
98. HTML Complementary Color - Solution
99. Counting DNA Nucleotides - Solution
100. Routes in a square grid - Solution
101. Point in Polygon - Solution
102. Run-length encoding - Solution
103. Once - Solution
104. Walter's miraculous FizzBuzz factory - Solution
105. Frog jumping - Solution
106. Simple time difference - Solution
107. The maximum and minimum difference -- Simple version - Solution
108. Simple arithmetic progression - Solution
109. Simple frequency sort - Solution
110. Checkerboard Generation - Solution
111. Twisted Sum - Solution
112. Sorting on planet Twisted-3-7 - Solution
113. Coding Meetup #15 - Higher-Order Functions Series - Find the odd names - Solution
114. Kebabize - Solution
115. Linked Lists - Recursive Reverse - Solution
116. Longest 2-character substring - Solution
117. Linked Lists - Insert Nth Node - Solution
118. Linked Lists - Iterative Reverse - Solution
119. Reverse a singly-linked list - Solution
120. Linked Lists - Merge Sort - Solution
121. Linked Lists - Sorted Intersect - Solution
122. Linked Lists - Sorted Merge - Solution
123. Linked Lists - Shuffle Merge - Solution
124. Linked Lists - Insert Sort - Solution

1. Convert A Hex String To RGB - Solution
2. Square Matrix Multiplication - Solution
3. Directions Reduction - Solution
4. Greed is Good - Solution
5. Sort - one, three, two - Solution
6. k-Primes - Solution
7. Moving Zeros To The End - Solution
8. Rotate a square matrix like a vortex - Solution
9. Rotate a square matrix in place - Solution
10. Consecutive k-Primes - Solution
11. Some Egyptian fractions - Solution
12. Pick peaks - Solution
13. Going to zero or to infinity? - Solution
14. PaginationHelper - Solution
15. Simple digit code breaker - Solution
16. Escape the Mines ! - Solution
17. Conway's Game of Life - Solution
18. Knapsack Part 1 - The Greedy Solution - Solution
19. Complete Binary Tree - Solution
20. Radix Tree - Solution
21. Binary search tree validation - Solution
22. Tree to list - Solution
23. The Clockwise Spiral - Solution
24. Can you get the loop ? - Solution
25. Simple Time Bomb - Solution
26. First non-repeating character - Solution
27. Linked Lists - Alternating Split - Solution
28. Return substring instance count - 2 - Solution
29. The longest bracket substring in the string - Solution
30. Alphabet war - Wo lo loooooo priests join the war - Solution
31. Alphabet wars - nuclear strike - Solution
32. Sat Nav directions - Solution
33. Coding with Squared Strings - Solution
34. The Hashtag Generator - Solution
35. Secret knock - Solution
36. int32 to IPv4 - Solution
37. Extract the domain name from a URL - Solution
38. String incrementer - Solution
39. Sum of Pairs - Solution
40. Molecule to atoms - Solution
41. Count IP Addresses - Solution
42. Morse Encoding - Solution
43. All that is open must be closed... - Solution
44. Domain name validator - Solution
45. Ninety Nine Thousand Nine Hundred Ninety Nine - Solution
46. Count the Domain Names - Solution
47. Langton's Ant - Advanced Version - Solution
48. Translate DNA in 6 frames - Solution
49. Langton's ant - Solution
50. Prime Ant - Performance Version - Solution
51. Ant Bridge - Solution
52. Largest rectangle in background - Solution
53. Retirement Planning as a Service - Solution
54. My Very Own Python's Split Function - Solution
55. Video Digest - Solution
56. Python's Dynamic Classes #3 - Solution
57. Connect 4 - Solution
58. Snakes and Ladders - Solution
59. Mastermind - Solution
60. Solve For X - Solution
61. Write out numbers - Solution
62. Loose Change (Part 2) - Solution
63. Perimeter of squares in a rectangle - Solution
64. Generate Numbers From Digits #2 - Solution
65. Generating Numbers From Prime Factors I - Solution
66. Binary Genetic Algorithms - Solution
67. The Binary Binary Expansion - Solution
68. Find the smallest - Solution
69. @validate_args - Solution
70. Esolang: Stick - Solution
71. Esolang: InfiniTick - Solution
72. Esolang: Ticker - Solution
73. Esolang Interpreters #2 - Custom Smallfuck Interpreter - Solution
74. Vigenère Autokey Cipher Helper - Solution
75. Vector class - Solution
76. Geohashing - Solution
77. Caesar Cipher Helper - Solution
78. First Variation on Caesar Cipher - Solution
79. Closest Neighbouring Points I - Solution
80. Simple string expansion - Solution
81. Solve the Grid! Binary Toggling Puzzle - Solution
82. Counting the Webdesigns based on Used Colours - Solution
83. Max Collatz Sequence Length - Solution
84. Find the most adjacent integers of the same value in a grid - Solution
85. Chess Fun #7: Chess Triangle - Solution
86. Limited number of instances - Solution
87. Refactor a node-based calculator (DRY) - Solution
88. Mistaking a forest for a tree - Solution
89. Constructing polynomials - Solution
90. Diophantine Equation - Solution
91. Cryptic Cave: Episode 1 - Solution
92. What Would They Have in Common? - Solution
93. The Sum and The Rest of Certain Pairs of Numbers have to be Perfect Squares (more Challenging) - Solution
94. Rearrangement of Numbers to Have The Minimum Divisible by a Given Factor - Solution
95. A Chain adding function - Solution
96. Human Readable Time - Solution
97. Double Cola - Solution
98. Bulk up! - Solution
99. Ziggurat Ride of Fortune - Solution
100. Interlaced Spiral Cipher - Solution
101. Transposing Guitar Tabs - Solution
102. Haiku Checker - Solution
103. Merged String Checker - Solution
104. Help Suzuki pack his coal basket! - Solution
105. Simple Finite State Machine Compiler - Solution
106. Working With Coloured Numbers - Solution
107. Sequence of Power Digits Sum - Solution
108. self_converge - Solution
109. Mean without outliers - Solution
110. Equivalent Dice - Solution
111. Word Search Grid - Solution
112. Least Common Multiple - Solution
113. Binary Search Trees - Solution
114. Resistor Color Codes, Part 2 - Solution
115. Family Tree - Ancestors - Solution
116. Map and Filter to Get a Special Sequence of Integers - Solution
117. Shuffle It Up - Solution
118. Is my friend cheating? - Solution
119. Did I Finish my Sudoku? - Solution
120. What's a Perfect Power anyway? - Solution
121. Memoized Fibonacci - Solution
122. Compute the Largest Sum of all Contiguous Subsequences - Solution
123. Rule 30 - Solution
124. Josephus Permutation - Solution
125. Josephus Survivor - Solution

1. Snail - Solution
2. Twice linear - Solution
3. Sum by Factors - Solution
4. Pascal's Triangle - Solution
5. Hamming Numbers - Solution
6. Sums of Perfect Squares - Solution
7. Magnet particules in boxes - Solution
8. Matrix Determinant - Solution
9. Square into Squares. Protect trees! - Solution
10. Sort binary tree by levels - Solution
11. One Line Task: Squirrel And Tree - Solution
12. Strings Mix - Solution
13. How many numbers III? - Solution
14. BasE91 encoding & decoding - Solution
15. Regular expression for binary numbers divisible by 5 - Solution
16. Range Extraction - Solution
17. Most frequently used words in a text - Solution
18. parseInt() reloaded - Solution
19. Breadcrumb Generator - Solution
20. Simplifying multilinear polynomials - Solution
21. Decode the Morse code, advanced - Solution
22. Simplexer - Solution
23. Bridge Puzzle - Solution
24. Bribe the Guards of the Crown Jewels - Solution
25. Dynamic Connectivity - Solution
26. Connect Four - Solution
27. Mystery Function - Solution
28. The fusc function -- Part 2 - Solution
29. Factorial tail - Solution
30. Befunge Interpreter - Solution
31. Esolang Interpreters #3 - Custom Paintf**k Interpreter - Solution
32. Vigenère Cipher Helper - Solution
33. Social Golfer Problem Validator - Solution
34. Codewars style ranking system - Solution
35. Exponentials as fractions - Solution
36. Binary sXORe - Solution
37. Numbers with Collatz Starting Patterns - Solution
38. Count Squares In the Chess Board - Solution
39. Stack Arithmetic Machine - Solution
40. 4 By 4 Skyscrapers - Solution
41. Counting Change Combinations - Solution
42. Route Calculator - Solution
43. Boggle Word Checker - Solution
44. A Simplistic TCP Finite State Machine (FSM) - Solution
45. Find all possible number combos that sum to a number - Solution
46. Simple maze - Solution
47. The Greatest Warrior - Solution
48. Next smaller number with the same digits - Solution
49. Explosive Sum - Solution
50. Path Finder #1: can you reach the exit? - Solution
51. Next bigger number with the same digits - Solution
52. Sum of Intervals - Solution
53. Binary multiple of 3 - Solution
54. Permutations - Solution
55. Count ones in a segment - Solution
56. Differentiate a polynomial - Solution
57. Catching Car Mileage Numbers - Solution
58. NIM the game - Solution
59. Number of Proper Fractions with Denominator d - Solution
60. SKRZAT!!! - Solution
61. Shallowest path across the river - Solution
62. Roman Numerals Helper - Solution
63. Linear Equation Solver - Solution
64. 'Magic' recursion call depth number - Solution
65. Multiples of 3, you say? - Solution
66. Sudoku Solution Validator - Solution
67. Permutational Primes - Solution
68. Tournament Cross Table with Sonneborn-Berger Score - Solution
69. Sortable Poker Hands - Solution
70. Simple Fun #148: Exchange Sort - Solution
71. Ranking Poker Hands - Solution
72. Recover a secret string from random triplets - Solution
73. Dice rolls threshold - Solution
74. Getting along with Integer Partitions - Solution
75. Validate Sudoku with size NxN - Solution
76. Square and Cube of a Number Become Prime When Reversed - Solution
77. Memoized Log Cutting - Solution
78. We are Family - Solution
79. Helpers For a 3DGame I: Biggest Triangle in a Sphere - Solution
80. Counting String Subsequences - Solution
81. Counting inner calls in an unknown function. - Solution
82. Can you really count divisors? - Solution
83. Human readable duration format - Solution
84. Burrows-Wheeler-Transformation - Solution
85. Great Total Additions of All Possible Arrays from a List. - Solution
86. Coloured Lattice Points Forming Coloured Triangles - Solution
87. Unflatten a list (Harder than easy) - Solution
88. Pyramid Slide Down - Solution
89. Top Down Movement System - Solution
90. Bad Exception Handling - Solution
91. Decimal to any Rational or Irrational Base Converter - Solution
92. Path Finder #2: shortest path - Solution
93. Shortest Knight Path - Solution
94. Nesting Structure Comparison - Solution
95. Algebraic Lists - Solution
96. 5x5 Nonogram Solver - Solution
97. Tracking pawns - Solution
98. Conway's Game of Life - Unlimited Edition - Solution
99. Smallest possible sum - Solution
100. Instant Runoff Voting - Solution
101. Text align justify - Solution
102. Product-Sum Numbers - Solution
103. Matunga coins - Solution
104. Domino Tiling - 2 x N Board - Solution
105. The learning game - Machine Learning #1 - Solution
106. Brainfuck Translator - Solution
107. String -> X-Iterations -> String - Solution
108. Chess Fun #8: Amazon Checkmate - Solution
109. Simple Fun #159: Middle Permutation - Solution
110. Find the unknown digit - Solution
111. Simple Fun #27: Rectangle Rotation - Solution
112. Total increasing or decreasing numbers up to a power of 10 - Solution
113. Ten-Pin Bowling - Solution
114. Mahjong - #1 Pure Hand - Solution
115. Convex hull area - Solution
116. Compute a convex hull - Solution
117. Splitting the Workload (part II) - Solution
118. Tower Defense: Risk Analysis - Solution
119. Number of integer partitions - Solution
120. Bernoulli numbers - Solution
121. Spinning Rings - Fidget Spinner Edition - Solution
122. Bezier Curves - Solution
123. Generic number class - Solution
124. Currying vs. Partial Application - Solution
125. Regular Expressions (groups): Splitting phone numbers into their separate parts. - Solution

1. 7×7 Skyscrapers - Solution
2. Evaluate mathematical expression - Solution
3. Odd + Even = Odd? Prove it! - Solution
4. GET TO THE CHOPPA! - Solution
5. The builder of things - Solution
6. Alphabetic Anagrams - Solution
7. Church Numbers - Add, Multiply, Exponents - Solution
8. Last digit of a huge number - Solution
9. Regular Expression for Binary Numbers Divisible by n - Solution
10. Regular expression parser - Solution
11. Regular Expression - Check if divisible by 0b111 (7) - Solution
12. Calculator - Solution
13. Simpler Interactive Interpreter - Solution
14. Expression Transpiler - Solution
15. Tiny Three-Pass Compiler - Solution
16. Prime Ant - Crazy Version - Solution
17. Prime Streaming (PG-13) - Solution
18. Connect Letters - Solution
19. Count Connectivity Components - Solution
20. Whitespace Interpreter - Solution
21. Esolang Interpreters #4 - Boolfuck Interpreter - Solution
22. Papers, Please - Solution
23. Find the cheapest path - Solution
24. One Line Task: Circle Intersection - Solution
25. Make a spiral - Solution
26. Gerrymander Solver - Solution
27. Hard Sudoku Solver - Solution
28. Sudoku Solver - Solution
29. Alphametics Solver - Solution
30. Hard Sudoku Solver - Solution
31. 6 By 6 Skyscrapers - Solution
32. Line Safari - Is that a line? - Solution
33. The Millionth Fibonacci Kata - Solution
34. N-Parasitic Numbers Ending in N - Solution
35. Euclidean distance in n dimensions - Solution
36. Symbolic differentiation of prefix expressions - Solution
37. Simplifying - Solution
38. To BrainFuck Transpiler - Solution
39. Type Transpiler - Solution
40. Four Pass Transport - Solution
41. Break the pieces (Evilized Edition) - Solution
42. Check and Mate? - Solution
43. Rail Fence Cipher: Encoding and Decoding - Solution
44. Break the pieces - Solution
45. Decode the Morse code, for real - Solution
46. Unique digit sequence II - Optimization problem - Solution
47. Screen Locking Patterns - Solution
48. Huffman Encoding - Solution
49. Stargate SG-1: Cute and Fuzzy (Improved version) - Solution
50. Debugger - Solution
51. Full Metal Chemist #1: build me... - Solution
52. Blobservation - Solution
53. Closest pair of points in linearithmic time - Solution
54. Path Finder #3: the Alpinist - Solution
55. Multisize Nonogram Solver - Solution
56. 15x15 Nonogram Solver - Solution
57. Bloxorz Solver - Solution
58. Transforming Maze Solver - Solution
59. Centre of attention - Solution
60. Battleship field validator - Solution
61. Battleship field validator II - Solution
62. Game of Go - Solution
63. The boolean order - Solution
64. Square sums - Solution
65. Mine Sweeper - Solution
66. BECOME IMMORTAL - Solution
67. Sliding Puzzle Solver - Solution
68. Insane Coloured Triangles - Solution
69. Cut the cake - Solution
70. Ludicrous Coloured Triangles - Solution
71. The position of a digital string in a infinite digital string - Solution
72. Mahjong - #2 Seven-pairs - Solution
73. Binomial Expansion - Solution
74. Assembler interpreter (part II) - Solution
75. Blaine is a pain - Solution
76. Insane Tri-Bicolor Tiling - Solution
77. Insane Circular Limited Sums - Solution
78. Upside-Down Numbers - Challenge Edition - Solution
79. Fabergè Easter Eggs crush test - Solution
80. RoboScript #4 - RS3 Patterns to the Rescue - Solution
81. Plants and Zombies - Solution
82. The Lift - Solution
83. Simple Interactive Interpreter - Solution
84. RoboScript #5 - The Final Obstacle (Implement RSU) - Solution
85. Faberge easter eggs crush test [linear] - Solution