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Roc Track Management

This page provides the Exercism community with the information and tools needed to manage the Roc track.

Students
131
Submissions
4,032
Mentoring Discussions
7

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Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: fc97fcfe1b0ad0d17e6143c0576ba8441b692b5c (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
100 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
120
133 (avg. 1.1)
105 (87.5%)
0 (0.0%)
High Scores High Scores
21
62 (avg. 3.0)
15 (71.4%)
0 (0.0%)
Leap Leap
73
240 (avg. 3.3)
59 (80.8%)
0 (0.0%)
Raindrops Raindrops
53
332 (avg. 6.3)
47 (88.7%)
1 (1.9%)
Resistor Color Resistor Color
46
115 (avg. 2.5)
42 (91.3%)
0 (0.0%)
Two-Fer Two-Fer
41
91 (avg. 2.2)
39 (95.1%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
31
175 (avg. 5.6)
27 (87.1%)
3 (9.7%)
Complex Numbers Complex Numbers
14
58 (avg. 4.1)
11 (78.6%)
0 (0.0%)
Darts Darts
23
67 (avg. 2.9)
19 (82.6%)
0 (0.0%)
Difference of Squares Difference of Squares
20
48 (avg. 2.4)
20 (100.0%)
0 (0.0%)
Grains Grains
19
107 (avg. 5.6)
17 (89.5%)
0 (0.0%)
Isogram Isogram
19
83 (avg. 4.4)
17 (89.5%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
6
10 (avg. 1.7)
5 (83.3%)
0 (0.0%)
Micro Blog Micro Blog
10
64 (avg. 6.4)
7 (70.0%)
0 (0.0%)
Nucleotide Count Nucleotide Count
7
38 (avg. 5.4)
7 (100.0%)
0 (0.0%)
Proverb Proverb
6
17 (avg. 2.8)
6 (100.0%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
14
87 (avg. 6.2)
13 (92.9%)
0 (0.0%)
RNA Transcription RNA Transcription
17
47 (avg. 2.8)
16 (94.1%)
0 (0.0%)
Robot Simulator Robot Simulator
5
6 (avg. 1.2)
5 (100.0%)
0 (0.0%)
Roman Numerals Roman Numerals
5
5 (avg. 1.0)
5 (100.0%)
0 (0.0%)
Scrabble Score Scrabble Score
10
13 (avg. 1.3)
10 (100.0%)
0 (0.0%)
Secret Handshake Secret Handshake
9
19 (avg. 2.1)
9 (100.0%)
0 (0.0%)
Series Series
8
31 (avg. 3.9)
7 (87.5%)
0 (0.0%)
Space Age Space Age
12
37 (avg. 3.1)
12 (100.0%)
0 (0.0%)
Sublist Sublist
12
26 (avg. 2.2)
9 (75.0%)
1 (8.3%)
Sum of Multiples Sum of Multiples
9
14 (avg. 1.6)
8 (88.9%)
0 (0.0%)
Triangle Triangle
9
11 (avg. 1.2)
8 (88.9%)
1 (11.1%)
Allergies Allergies
7
13 (avg. 1.9)
5 (71.4%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
10
30 (avg. 3.0)
10 (100.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
3
26 (avg. 8.7)
3 (100.0%)
0 (0.0%)
Binary Search Binary Search
12
48 (avg. 4.0)
9 (75.0%)
1 (8.3%)
Bob Bob
8
23 (avg. 2.9)
8 (100.0%)
0 (0.0%)
Clock Clock
22
271 (avg. 12.3)
14 (63.6%)
0 (0.0%)
Crypto Square Crypto Square
3
33 (avg. 11.0)
3 (100.0%)
0 (0.0%)
Diamond Diamond
8
43 (avg. 5.4)
7 (87.5%)
0 (0.0%)
ETL ETL
12
17 (avg. 1.4)
11 (91.7%)
0 (0.0%)
Hamming Hamming
8
18 (avg. 2.3)
7 (87.5%)
0 (0.0%)
ISBN Verifier ISBN Verifier
7
14 (avg. 2.0)
6 (85.7%)
0 (0.0%)
Largest Series Product Largest Series Product
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Matching Brackets Matching Brackets
7
24 (avg. 3.4)
6 (85.7%)
0 (0.0%)
Matrix Matrix
7
25 (avg. 3.6)
6 (85.7%)
0 (0.0%)
Nth Prime Nth Prime
3
3 (avg. 1.0)
3 (100.0%)
0 (0.0%)
Pangram Pangram
11
10 (avg. 0.9)
10 (90.9%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Phone Number Phone Number
3
66 (avg. 22.0)
3 (100.0%)
0 (0.0%)
Protein Translation Protein Translation
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
3
9 (avg. 3.0)
3 (100.0%)
0 (0.0%)
Queen Attack Queen Attack
6
15 (avg. 2.5)
6 (100.0%)
0 (0.0%)
Rectangles Rectangles
8
23 (avg. 2.9)
5 (62.5%)
0 (0.0%)
Reverse String Reverse String
8
18 (avg. 2.3)
8 (100.0%)
0 (0.0%)
Rotational Cipher Rotational Cipher
6
7 (avg. 1.2)
6 (100.0%)
0 (0.0%)
Saddle Points Saddle Points
5
6 (avg. 1.2)
4 (80.0%)
0 (0.0%)
Say Say
5
71 (avg. 14.2)
5 (100.0%)
0 (0.0%)
Sieve Sieve
4
15 (avg. 3.8)
4 (100.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
3
21 (avg. 7.0)
3 (100.0%)
0 (0.0%)
Square Root Square Root
5
5 (avg. 1.0)
5 (100.0%)
0 (0.0%)
Strain Strain
3
4 (avg. 1.3)
3 (100.0%)
0 (0.0%)
Transpose Transpose
6
67 (avg. 11.2)
4 (66.7%)
0 (0.0%)
Word Count Word Count
4
31 (avg. 7.8)
4 (100.0%)
0 (0.0%)
Yacht Yacht
5
33 (avg. 6.6)
5 (100.0%)
0 (0.0%)
Anagram Anagram
13
92 (avg. 7.1)
7 (53.8%)
0 (0.0%)
Custom Set Custom Set
2
4 (avg. 2.0)
2 (100.0%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
7
14 (avg. 2.0)
7 (100.0%)
0 (0.0%)
Food Chain Food Chain
5
51 (avg. 10.2)
3 (60.0%)
0 (0.0%)
House House
6
28 (avg. 4.7)
6 (100.0%)
0 (0.0%)
Meetup Meetup
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
OCR Numbers OCR Numbers
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Perfect Numbers Perfect Numbers
4
4 (avg. 1.0)
4 (100.0%)
0 (0.0%)
Prime Factors Prime Factors
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
3
15 (avg. 5.0)
3 (100.0%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
All Your Base All Your Base
5
6 (avg. 1.2)
4 (80.0%)
0 (0.0%)
Circular Buffer Circular Buffer
6
55 (avg. 9.2)
6 (100.0%)
0 (0.0%)
Error Handling Error Handling
7
61 (avg. 8.7)
6 (85.7%)
0 (0.0%)
Flatten Array Flatten Array
8
16 (avg. 2.0)
8 (100.0%)
1 (12.5%)
Killer Sudoku Helper Killer Sudoku Helper
4
18 (avg. 4.5)
2 (50.0%)
0 (0.0%)
Knapsack Knapsack
2
4 (avg. 2.0)
2 (100.0%)
0 (0.0%)
Acronym Acronym
7
13 (avg. 1.9)
7 (100.0%)
0 (0.0%)
Change Change
2
12 (avg. 6.0)
2 (100.0%)
0 (0.0%)
Connect Connect
4
66 (avg. 16.5)
3 (75.0%)
0 (0.0%)
Go Counting Go Counting
3
21 (avg. 7.0)
2 (66.7%)
0 (0.0%)
Gigasecond Gigasecond
4
32 (avg. 8.0)
4 (100.0%)
1 (25.0%)
List Ops List Ops
8
10 (avg. 1.3)
7 (87.5%)
0 (0.0%)
Luhn Luhn
6
19 (avg. 3.2)
6 (100.0%)
1 (16.7%)
Minesweeper Minesweeper
6
13 (avg. 2.2)
5 (83.3%)
0 (0.0%)
Palindrome Products Palindrome Products
0
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
Rational Numbers Rational Numbers
4
27 (avg. 6.8)
4 (100.0%)
0 (0.0%)
Tournament Tournament
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
Two Bucket Two Bucket
2
3 (avg. 1.5)
2 (100.0%)
0 (0.0%)
Word Search Word Search
3
8 (avg. 2.7)
3 (100.0%)
0 (0.0%)
Bowling Bowling
3
31 (avg. 10.3)
2 (66.7%)
0 (0.0%)
Pig Latin Pig Latin
5
51 (avg. 10.2)
4 (80.0%)
0 (0.0%)
Poker Poker
3
62 (avg. 20.7)
2 (66.7%)
0 (0.0%)
Wordy Wordy
4
27 (avg. 6.8)
4 (100.0%)
0 (0.0%)
Alphametics Alphametics
4
54 (avg. 13.5)
1 (25.0%)
0 (0.0%)
Dominoes Dominoes
3
41 (avg. 13.7)
2 (66.7%)
0 (0.0%)
Grep Grep
2
10 (avg. 5.0)
1 (50.0%)
0 (0.0%)
REST API REST API
7
52 (avg. 7.4)
3 (42.9%)
0 (0.0%)
Forth Forth
5
24 (avg. 4.8)
5 (100.0%)
0 (0.0%)
SGF Parsing SGF Parsing
1
0 (avg. 0.0)
0 (0.0%)
0 (0.0%)
4 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
21
46 (avg. 2.2)
21 (100.0%)
0 (0.0%)
Binary Binary
16
82 (avg. 5.1)
14 (87.5%)
0 (0.0%)
Hexadecimal Hexadecimal
5
13 (avg. 2.6)
3 (60.0%)
0 (0.0%)
Octal Octal
4
10 (avg. 2.5)
4 (100.0%)
0 (0.0%)
29 unimplemented practice exercises
Affine Cipher Affine Cipher
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Book Store Book Store
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Bottle Song Bottle Song
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Conway's Game of Life Conway's Game of Life
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D&D Character D&D Character
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DOT DSL DOT DSL
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Grade School Grade School
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Hangman Hangman
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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Markdown Markdown
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PaaS I/O PaaS I/O
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Parallel Letter Frequency Parallel Letter Frequency
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POV POV
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Rail Fence Cipher Rail Fence Cipher
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React React
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Resistor Color Trio Resistor Color Trio
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Robot Name Robot Name
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Satellite Satellite
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Simple Cipher Simple Cipher
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Simple Linked List Simple Linked List
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Tree Building Tree Building
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Twelve Days Twelve Days
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Zebra Puzzle Zebra Puzzle
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Zipper Zipper
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Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: b7084324510e909aab03c7c1cd14d745f62ffaba (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. Roc is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
4,014
Test Run Pass Rate
31.8% (1275)
Test Run Fail Rate
17.7% (712)
Test Run Error Rate
50.5% (2027)

Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for Roc: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.