Ninety-nine Problems, Solved in Elm
Introduction
Learning Track
Simple List Functions
Passing functions as arguments
Maybe, Just, Nothing
Recursion
Recursion on Lists
Recursion on Binary Trees
Map
Fold
Problems by Category
Lists
Lists and Tuples
Binary Trees
Combinations, Randomness, Sorting
Arithmetic
Logic and Codes
Multi-way Trees
Graphs
Puzzles
All Problems
Problem 1
Problem 2
Problem 3
Problem 4
Problem 5
Problem 6
Problem 7
Extra 1
Extra 2
Problem 8
Problem 9
Problem 10
Problem 11
Problem 12
Problem 14
Problem 15
Problem 16
Problem 17
Problem 18
Problem 19
Problem 20
Problem 21
Problem 22
Problem 23
Problem 24
Problem 26
Problem 28a
Problem 28b
Problem 31
Problem 32
Problem 33
Problem 34
Problem 35
Problem 36
Problem 37
Problem 38
Problem 39
Problem 40
Problem 41
Problem 46
Problem 47
Problem 49
Problem 50a
Problem 50b
Problem 54
Problem 55
Problem 56
Problem 57
Problem 61a
Problem 61b
Problem 62a
Problem 62b
Problem 63
Problem 64
Problem 65
Problem 67
Problem 67b
Problem 68a
Problem 68b
Problem 68c
Problem 69
Problem 70a
Problem 70b
Problem 71
Problem 72
Problem 73
Problem 80a
Problem 80b
Problem 81
Problem 84
Problem 86a
Problem 86b
Problem 87a
Problem 87b
Problem 88
Problem 90
Problem 91
Problem 92
Problem 93
Problem 94
Problem 95
Problem 96
Problem 97
Problem 98
Problem 99
All Solutions
Problem 1 Solutions
Problem 2 Solutions
Problem 3 Solutions
Problem 4 Solutions
Problem 5 Solutions
Problem 6 Solutions
Problem 7 Solution
Extra 1 Solutions
Extra 2 Solutions
Problem 8 Solutions
Problem 9 Solutions
Problem 10 Solutions
Problem 11 Solutions
Problem 12 Solutions
Problem 14 Solutions
Problem 15 Solutions
Problem 16 Solutions
Problem 17 Solutions
Problem 18 Solutions
Problem 19 Solution
Problem 20 Solutions
Problem 21 Solutions
Problem 22 Solutions
Problem 23 Solutions
Problem 24 Solution
Problem 26 Solutions
Problem 27 Solutions
Problem 28a Solutions
Problem 28b Solutions
Problem 31 Solutions
Problem 32 Solutions
Problem 33 Solutions
Problem 34 Solutions
Problem 35 Solutions
Problem 36 Solutions
Problem 37 Solutions
Problem 38 Solutions
Problem 39 Solutions
Problem 40 Solutions
Problem 41 Solutions
Problem 46 Solutions
Problem 47 Solutions
Problem 49 Solutions
Problem 50a Solutions
Problem 54 Solutions
Problem 55 Solutions
Problem 56 Solutions
Problem 57 Solutions
Problem 61a Solutions
Problem 61b Solutions
Problem 62a Solutions
Problem 62b Solutions
Problem 63 Solutions
Problem 64 Solutions
Problem 65 Solutions
Problem 67 Solution
Problem 68a Solutions
Problem 68b Solutions
Problem 68c Solutions
Problem 69 Solutions
Problem 70a Solutions
Problem 70b Solutions
Problem 71 Solutions
Problem 72 Solutions
Problem 73 Solutions
Problem 74 Solutions
Problem 75 Solutions
Problem 76 Solutions
Problem 77 Solutions
Problem 78 Solutions
Problem 79 Solutions
Problem 80a Solutions
Problem 80b Solutions
Problem 81 Solutions
Problem 84 Solutions
Problem 86a Solution
Problem 86b Solution
Problem 87a Solution
Problem 87b Solution
Problem 88 Solutions
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Problem 54
Problem 54
Define a data type to represent a binary tree.
type
Tree
a =
-- your definition goes here
Solution
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