Roc
Roc
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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
312
Submissions
9,449
Mentoring Discussions
8

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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: 9c9d20c07a1fa0b7f10702878d845b89769ee70d (Updates should be instant)

Next goal: Implement 135 practice exercises. Find out more.
105 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
286
352 (avg. 1.2)
221 (77.3%)
0 (0.0%)
High Scores High Scores
112
454 (avg. 4.1)
76 (67.9%)
0 (0.0%)
Leap Leap
134
511 (avg. 3.8)
115 (85.8%)
1 (0.7%)
Raindrops Raindrops
105
796 (avg. 7.6)
93 (88.6%)
1 (1.0%)
Resistor Color Resistor Color
94
263 (avg. 2.8)
87 (92.6%)
0 (0.0%)
Two-Fer Two-Fer
83
235 (avg. 2.8)
81 (97.6%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
74
498 (avg. 6.7)
65 (87.8%)
3 (4.1%)
Complex Numbers Complex Numbers
53
203 (avg. 3.8)
42 (79.2%)
0 (0.0%)
Darts Darts
64
261 (avg. 4.1)
56 (87.5%)
0 (0.0%)
Difference of Squares Difference of Squares
54
152 (avg. 2.8)
54 (100.0%)
0 (0.0%)
Grains Grains
50
331 (avg. 6.6)
43 (86.0%)
0 (0.0%)
Isogram Isogram
49
287 (avg. 5.9)
39 (79.6%)
1 (2.0%)
Kindergarten Garden Kindergarten Garden
26
215 (avg. 8.3)
19 (73.1%)
0 (0.0%)
Micro Blog Micro Blog
26
114 (avg. 4.4)
21 (80.8%)
0 (0.0%)
Nucleotide Count Nucleotide Count
26
100 (avg. 3.8)
26 (100.0%)
0 (0.0%)
Proverb Proverb
19
74 (avg. 3.9)
18 (94.7%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
30
136 (avg. 4.5)
27 (90.0%)
0 (0.0%)
RNA Transcription RNA Transcription
36
139 (avg. 3.9)
33 (91.7%)
0 (0.0%)
Robot Simulator Robot Simulator
22
63 (avg. 2.9)
18 (81.8%)
0 (0.0%)
Roman Numerals Roman Numerals
15
17 (avg. 1.1)
13 (86.7%)
0 (0.0%)
Scrabble Score Scrabble Score
25
50 (avg. 2.0)
23 (92.0%)
0 (0.0%)
Secret Handshake Secret Handshake
19
65 (avg. 3.4)
19 (100.0%)
0 (0.0%)
Series Series
18
89 (avg. 4.9)
16 (88.9%)
0 (0.0%)
Space Age Space Age
23
55 (avg. 2.4)
23 (100.0%)
0 (0.0%)
Sublist Sublist
23
70 (avg. 3.0)
18 (78.3%)
1 (4.3%)
Sum of Multiples Sum of Multiples
17
31 (avg. 1.8)
14 (82.4%)
0 (0.0%)
Triangle Triangle
16
41 (avg. 2.6)
13 (81.3%)
1 (6.3%)
Allergies Allergies
13
21 (avg. 1.6)
9 (69.2%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
16
64 (avg. 4.0)
16 (100.0%)
0 (0.0%)
Atbash Cipher Atbash Cipher
8
34 (avg. 4.3)
6 (75.0%)
0 (0.0%)
Binary Search Binary Search
18
64 (avg. 3.6)
14 (77.8%)
1 (5.6%)
Bob Bob
14
38 (avg. 2.7)
12 (85.7%)
0 (0.0%)
Clock Clock
26
297 (avg. 11.4)
18 (69.2%)
0 (0.0%)
Crypto Square Crypto Square
8
64 (avg. 8.0)
7 (87.5%)
0 (0.0%)
Diamond Diamond
13
50 (avg. 3.8)
10 (76.9%)
0 (0.0%)
ETL ETL
17
42 (avg. 2.5)
16 (94.1%)
0 (0.0%)
Hamming Hamming
17
60 (avg. 3.5)
16 (94.1%)
0 (0.0%)
ISBN Verifier ISBN Verifier
12
48 (avg. 4.0)
10 (83.3%)
0 (0.0%)
Largest Series Product Largest Series Product
7
51 (avg. 7.3)
5 (71.4%)
0 (0.0%)
Matching Brackets Matching Brackets
11
30 (avg. 2.7)
9 (81.8%)
0 (0.0%)
Matrix Matrix
12
116 (avg. 9.7)
10 (83.3%)
0 (0.0%)
Nth Prime Nth Prime
9
13 (avg. 1.4)
8 (88.9%)
0 (0.0%)
Pangram Pangram
18
39 (avg. 2.2)
17 (94.4%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
7
13 (avg. 1.9)
6 (85.7%)
0 (0.0%)
Phone Number Phone Number
8
74 (avg. 9.3)
7 (87.5%)
0 (0.0%)
Protein Translation Protein Translation
10
63 (avg. 6.3)
9 (90.0%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
8
142 (avg. 17.8)
6 (75.0%)
0 (0.0%)
Queen Attack Queen Attack
11
36 (avg. 3.3)
9 (81.8%)
0 (0.0%)
Rectangles Rectangles
13
47 (avg. 3.6)
7 (53.8%)
0 (0.0%)
Reverse String Reverse String
14
24 (avg. 1.7)
13 (92.9%)
0 (0.0%)
Rotational Cipher Rotational Cipher
10
14 (avg. 1.4)
10 (100.0%)
0 (0.0%)
Saddle Points Saddle Points
8
10 (avg. 1.3)
6 (75.0%)
0 (0.0%)
Say Say
10
77 (avg. 7.7)
8 (80.0%)
0 (0.0%)
Sieve Sieve
8
19 (avg. 2.4)
7 (87.5%)
0 (0.0%)
Simple Linked List Simple Linked List
7
25 (avg. 3.6)
5 (71.4%)
0 (0.0%)
Spiral Matrix Spiral Matrix
6
23 (avg. 3.8)
5 (83.3%)
0 (0.0%)
Square Root Square Root
8
8 (avg. 1.0)
7 (87.5%)
0 (0.0%)
Strain Strain
7
14 (avg. 2.0)
7 (100.0%)
0 (0.0%)
Transpose Transpose
11
70 (avg. 6.4)
7 (63.6%)
0 (0.0%)
Word Count Word Count
9
72 (avg. 8.0)
8 (88.9%)
0 (0.0%)
Yacht Yacht
9
38 (avg. 4.2)
8 (88.9%)
0 (0.0%)
Affine Cipher Affine Cipher
7
38 (avg. 5.4)
4 (57.1%)
0 (0.0%)
Anagram Anagram
19
136 (avg. 7.2)
12 (63.2%)
0 (0.0%)
Binary Search Tree Binary Search Tree
12
59 (avg. 4.9)
10 (83.3%)
0 (0.0%)
Custom Set Custom Set
7
7 (avg. 1.0)
4 (57.1%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
12
32 (avg. 2.7)
12 (100.0%)
0 (0.0%)
Food Chain Food Chain
7
52 (avg. 7.4)
4 (57.1%)
0 (0.0%)
House House
8
30 (avg. 3.8)
7 (87.5%)
0 (0.0%)
Meetup Meetup
4
15 (avg. 3.8)
3 (75.0%)
0 (0.0%)
OCR Numbers OCR Numbers
7
218 (avg. 31.1)
4 (57.1%)
0 (0.0%)
Perfect Numbers Perfect Numbers
7
8 (avg. 1.1)
6 (85.7%)
0 (0.0%)
Prime Factors Prime Factors
9
15 (avg. 1.7)
8 (88.9%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
6
18 (avg. 3.0)
5 (83.3%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
5
18 (avg. 3.6)
4 (80.0%)
0 (0.0%)
All Your Base All Your Base
11
13 (avg. 1.2)
9 (81.8%)
0 (0.0%)
Circular Buffer Circular Buffer
11
60 (avg. 5.5)
9 (81.8%)
0 (0.0%)
Error Handling Error Handling
9
64 (avg. 7.1)
7 (77.8%)
0 (0.0%)
Flatten Array Flatten Array
13
22 (avg. 1.7)
11 (84.6%)
1 (7.7%)
Killer Sudoku Helper Killer Sudoku Helper
7
20 (avg. 2.9)
4 (57.1%)
0 (0.0%)
Knapsack Knapsack
5
8 (avg. 1.6)
4 (80.0%)
0 (0.0%)
Rail Fence Cipher Rail Fence Cipher
5
10 (avg. 2.0)
3 (60.0%)
0 (0.0%)
Acronym Acronym
11
22 (avg. 2.0)
9 (81.8%)
0 (0.0%)
Change Change
4
14 (avg. 3.5)
3 (75.0%)
0 (0.0%)
Connect Connect
7
69 (avg. 9.9)
4 (57.1%)
0 (0.0%)
Go Counting Go Counting
6
262 (avg. 43.7)
4 (66.7%)
0 (0.0%)
Gigasecond Gigasecond
7
35 (avg. 5.0)
6 (85.7%)
1 (14.3%)
List Ops List Ops
11
12 (avg. 1.1)
9 (81.8%)
0 (0.0%)
Luhn Luhn
12
25 (avg. 2.1)
11 (91.7%)
1 (8.3%)
Minesweeper Minesweeper
8
14 (avg. 1.8)
6 (75.0%)
0 (0.0%)
Palindrome Products Palindrome Products
3
53 (avg. 17.7)
2 (66.7%)
0 (0.0%)
Rational Numbers Rational Numbers
6
29 (avg. 4.8)
5 (83.3%)
0 (0.0%)
Tournament Tournament
5
14 (avg. 2.8)
4 (80.0%)
0 (0.0%)
Two Bucket Two Bucket
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Word Search Word Search
5
8 (avg. 1.6)
3 (60.0%)
0 (0.0%)
Bowling Bowling
7
33 (avg. 4.7)
3 (42.9%)
0 (0.0%)
Pig Latin Pig Latin
7
53 (avg. 7.6)
5 (71.4%)
0 (0.0%)
Poker Poker
5
64 (avg. 12.8)
3 (60.0%)
0 (0.0%)
Wordy Wordy
6
29 (avg. 4.8)
5 (83.3%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
2
15 (avg. 7.5)
1 (50.0%)
0 (0.0%)
Alphametics Alphametics
6
101 (avg. 16.8)
2 (33.3%)
0 (0.0%)
Dominoes Dominoes
5
42 (avg. 8.4)
3 (60.0%)
0 (0.0%)
Grep Grep
7
14 (avg. 2.0)
4 (57.1%)
0 (0.0%)
REST API REST API
14
58 (avg. 4.1)
5 (35.7%)
0 (0.0%)
Forth Forth
9
43 (avg. 4.8)
7 (77.8%)
0 (0.0%)
SGF Parsing SGF Parsing
6
41 (avg. 6.8)
2 (33.3%)
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%)
30 unimplemented practice exercises
Baffling Birthdays Baffling Birthdays
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Bank Account Bank Account
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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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Intergalactic Transmission Intergalactic Transmission
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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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Piecing It Together Piecing It Together
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POV POV
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React React
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Relative Distance Relative Distance
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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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Split-Second Stopwatch Split-Second Stopwatch
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Swift Scheduling Swift Scheduling
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Tree Building Tree Building
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Twelve Days Twelve Days
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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: 172e0abdc78d9b069c648718707c9036d55a9b29 (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
9,411
Test Run Pass Rate
30.9% (2909)
Test Run Fail Rate
15.5% (1454)
Test Run Error Rate
53.6% (5048)

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.