C impact and status on Exercism

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1798 mentors

C Track Management

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

Students

119,025

Submissions

1,401,467

Mentoring Discussions

9,034

The C track needs attention ⚠️

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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: c430789f33753d6f65518a29a41baf9d57771293 (Updates should be instant)

Next goal: Implement 137 practice exercises. Find out more.

83 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

94,516

317,133 (avg. 3.4)

44,191 (46.8%)

20 (0.0%)

Leap

14,024

68,904 (avg. 4.9)

7,568 (54.0%)

444 (3.2%)

Difference of Squares

9,754

52,311 (avg. 5.4)

7,378 (75.6%)

508 (5.2%)

Grains

8,802

70,455 (avg. 8.0)

6,659 (75.7%)

568 (6.5%)

Resistor Color

9,460

66,766 (avg. 7.1)

5,046 (53.3%)

697 (7.4%)

Collatz Conjecture

3,244

17,160 (avg. 5.3)

2,782 (85.8%)

90 (2.8%)

Queen Attack

2,948

19,201 (avg. 6.5)

2,292 (77.7%)

78 (2.6%)

Darts

4,232

18,122 (avg. 4.3)

2,956 (69.8%)

99 (2.3%)

Resistor Color Duo

2,885

9,980 (avg. 3.5)

2,271 (78.7%)

38 (1.3%)

Hamming

6,298

30,204 (avg. 4.8)

5,188 (82.4%)

611 (9.7%)

Space Age

2,809

11,993 (avg. 4.3)

2,322 (82.7%)

49 (1.7%)

RNA Transcription

2,363

16,425 (avg. 7.0)

1,955 (82.7%)

70 (3.0%)

Binary

2,591

18,580 (avg. 7.2)

2,122 (81.9%)

79 (3.0%)

Eliud's Eggs

1,423

5,999 (avg. 4.2)

1,162 (81.7%)

18 (1.3%)

Two Fer

1,973

9,726 (avg. 4.9)

1,661 (84.2%)

25 (1.3%)

Raindrops

2,091

9,562 (avg. 4.6)

1,729 (82.7%)

43 (2.1%)

D&D Character

1,290

8,143 (avg. 6.3)

1,029 (79.8%)

26 (2.0%)

Perfect Numbers

1,550

7,229 (avg. 4.7)

1,233 (79.5%)

17 (1.1%)

High Scores

1,553

11,660 (avg. 7.5)

1,221 (78.6%)

38 (2.4%)

Pangram

2,440

13,417 (avg. 5.5)

1,933 (79.2%)

62 (2.5%)

Resistor Color Trio

1,957

11,354 (avg. 5.8)

1,495 (76.4%)

32 (1.6%)

Armstrong Numbers

21,562

115,638 (avg. 5.4)

9,212 (42.7%)

1,752 (8.1%)

Isogram

9,831

89,333 (avg. 9.1)

5,687 (57.8%)

1,427 (14.5%)

Binary Search

3,590

28,576 (avg. 8.0)

2,529 (70.4%)

213 (5.9%)

Robot Simulator

1,881

7,434 (avg. 4.0)

1,421 (75.5%)

54 (2.9%)

Gigasecond

2,228

5,615 (avg. 2.5)

1,755 (78.8%)

138 (6.2%)

Triangle

1,563

6,998 (avg. 4.5)

1,156 (74.0%)

14 (0.9%)

Luhn

1,494

13,091 (avg. 8.8)

1,117 (74.8%)

38 (2.5%)

Allergies

1,773

9,091 (avg. 5.1)

1,250 (70.5%)

64 (3.6%)

Complex Numbers

1,292

4,272 (avg. 3.3)

1,061 (82.1%)

8 (0.6%)

Sum of Multiples

1,388

6,894 (avg. 5.0)

1,070 (77.1%)

24 (1.7%)

Clock

1,658

11,712 (avg. 7.1)

1,145 (69.1%)

45 (2.7%)

Rotational Cipher

726

4,186 (avg. 5.8)

641 (88.3%)

8 (1.1%)

Sieve

1,490

7,417 (avg. 5.0)

1,181 (79.3%)

44 (3.0%)

Square Root

3,583

13,389 (avg. 3.7)

2,517 (70.2%)

216 (6.0%)

Reverse String

1,921

14,706 (avg. 7.7)

1,499 (78.0%)

44 (2.3%)

Nucleotide Count

1,458

9,322 (avg. 6.4)

1,170 (80.2%)

28 (1.9%)

Protein Translation

721

4,292 (avg. 6.0)

599 (83.1%)

7 (1.0%)

Beer Song

1,384

7,668 (avg. 5.5)

1,020 (73.7%)

117 (8.5%)

Prime Factors

1,031

2,843 (avg. 2.8)

822 (79.7%)

8 (0.8%)

Nth Prime

1,063

3,830 (avg. 3.6)

841 (79.1%)

10 (0.9%)

All Your Base

1,009

5,622 (avg. 5.6)

681 (67.5%)

11 (1.1%)

Yacht

583

3,067 (avg. 5.3)

502 (86.1%)

7 (1.2%)

Scrabble Score

1,088

3,717 (avg. 3.4)

925 (85.0%)

24 (2.2%)

Sublist

901

3,282 (avg. 3.6)

687 (76.2%)

12 (1.3%)

Kindergarten Garden

651

3,387 (avg. 5.2)

521 (80.0%)

8 (1.2%)

Variable Length Quantity

89 (avg. 4.5)

12 (60.0%)

0 (0.0%)

Spiral Matrix

575

2,848 (avg. 5.0)

432 (75.1%)

5 (0.9%)

Grade School

2,860

27,731 (avg. 9.7)

1,339 (46.8%)

167 (5.8%)

Rational Numbers

1,652

13,561 (avg. 8.2)

1,096 (66.3%)

87 (5.3%)

Circular Buffer

2,161

19,557 (avg. 9.0)

1,234 (57.1%)

106 (4.9%)

List Ops

1,780

11,850 (avg. 6.7)

1,117 (62.8%)

78 (4.4%)

Saddle Points

1,151

6,511 (avg. 5.7)

754 (65.5%)

38 (3.3%)

Phone Number

1,226

8,216 (avg. 6.7)

903 (73.7%)

53 (4.3%)

Pascal's Triangle

1,227

5,108 (avg. 4.2)

881 (71.8%)

39 (3.2%)

Acronym

2,510

11,219 (avg. 4.5)

1,771 (70.6%)

121 (4.8%)

Matching Brackets

1,203

4,082 (avg. 3.4)

908 (75.5%)

53 (4.4%)

Roman Numerals

1,405

21,736 (avg. 15.5)

1,020 (72.6%)

75 (5.3%)

Anagram

1,052

3,298 (avg. 3.1)

793 (75.4%)

16 (1.5%)

Bob

1,196

5,517 (avg. 4.6)

941 (78.7%)

22 (1.8%)

Secret Handshake

958

4,584 (avg. 4.8)

761 (79.4%)

20 (2.1%)

ETL

765

2,485 (avg. 3.2)

599 (78.3%)

9 (1.2%)

Series

903

3,118 (avg. 3.5)

686 (76.0%)

9 (1.0%)

Diamond

772

2,332 (avg. 3.0)

613 (79.4%)

8 (1.0%)

Minesweeper

788

2,763 (avg. 3.5)

588 (74.6%)

10 (1.3%)

Run-Length Encoding

750

3,109 (avg. 4.1)

569 (75.9%)

14 (1.9%)

Atbash Cipher

815

2,774 (avg. 3.4)

637 (78.2%)

34 (4.2%)

Pythagorean Triplet

1,360

6,374 (avg. 4.7)

793 (58.3%)

51 (3.8%)

Linked List

1,522

10,543 (avg. 6.9)

899 (59.1%)

84 (5.5%)

Word Count

2,017

5,441 (avg. 2.7)

1,102 (54.6%)

198 (9.8%)

Rail Fence Cipher

782

3,295 (avg. 4.2)

578 (73.9%)

10 (1.3%)

Meetup

1,054

2,115 (avg. 2.0)

707 (67.1%)

11 (1.0%)

Pig Latin

739

3,788 (avg. 5.1)

559 (75.6%)

12 (1.6%)

Wordy

722

2,850 (avg. 3.9)

554 (76.7%)

13 (1.8%)

Crypto Square

654

2,162 (avg. 3.3)

512 (78.3%)

4 (0.6%)

Largest Series Product

782

2,857 (avg. 3.7)

606 (77.5%)

10 (1.3%)

Zebra Puzzle

452

1,251 (avg. 2.8)

348 (77.0%)

1 (0.2%)

Two Bucket

604

2,447 (avg. 4.1)

431 (71.4%)

3 (0.5%)

Binary Search Tree

962

4,014 (avg. 4.2)

624 (64.9%)

36 (3.7%)

Say

677

2,655 (avg. 3.9)

496 (73.3%)

6 (0.9%)

Knapsack

477

1,772 (avg. 3.7)

341 (71.5%)

2 (0.4%)

Palindrome Products

839

3,104 (avg. 3.7)

522 (62.2%)

18 (2.1%)

React

1,241

4,605 (avg. 3.7)

469 (37.8%)

24 (1.9%)

54 unimplemented practice exercises

Affine Cipher

Alphametics

Baffling Birthdays

Bank Account

Book Store

Bottle Song

Bowling

Change

Connect

Conway's Game of Life

Custom Set

Dominoes

DOT DSL

Error Handling

Flatten Array

Food Chain

Forth

Go Counting

Grep

Hangman

House

Intergalactic Transmission

ISBN Verifier

Killer Sudoku Helper

Ledger

Lens Person

Markdown

Matrix

Micro Blog

OCR Numbers

PaaS I/O

Parallel Letter Frequency

Piecing It Together

Poker

POV

Proverb

Rectangles

Relative Distance

REST API

Robot Name

Satellite

SGF Parsing

Simple Cipher

Simple Linked List

Split-Second Stopwatch

State of Tic-Tac-Toe

Strain

Swift Scheduling

Tournament

Transpose

Tree Building

Twelve Days

Word Search

Zipper

Programming Tags

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

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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: 5ebff6bd52429529d83687d2675737e22ee280d8 (Takes up to 10 mins to deploy)

Total Test Runner Runs

1,370,444

Test Run Pass Rate

15.5% (212947)

Test Run Fail Rate

22.2% (304286)

Test Run Error Rate

62.3% (853211)

Representer

Learn More

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 C: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.

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