C impact and status on Exercism

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1789 mentors

C Track Management

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

Students

116,933

Submissions

1,364,187

Mentoring Discussions

8,884

The C track needs attention ⚠️

Building

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: 61e26b90cd7b7fb35ce965563bbd6531246dbc2a (Updates should be instant)

Next goal: Implement 136 practice exercises. Find out more.

82 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

92,484

311,680 (avg. 3.4)

43,123 (46.6%)

20 (0.0%)

Leap

13,155

65,184 (avg. 5.0)

7,139 (54.3%)

413 (3.1%)

Difference of Squares

9,322

50,077 (avg. 5.4)

7,073 (75.9%)

496 (5.3%)

Grains

8,458

67,704 (avg. 8.0)

6,416 (75.9%)

559 (6.6%)

Resistor Color

9,219

64,709 (avg. 7.0)

4,897 (53.1%)

687 (7.5%)

Collatz Conjecture

3,056

16,165 (avg. 5.3)

2,623 (85.8%)

82 (2.7%)

Queen Attack

2,800

18,062 (avg. 6.5)

2,183 (78.0%)

74 (2.6%)

Darts

4,095

17,105 (avg. 4.2)

2,856 (69.7%)

97 (2.4%)

Resistor Color Duo

2,788

9,341 (avg. 3.4)

2,184 (78.3%)

35 (1.3%)

Hamming

6,197

29,711 (avg. 4.8)

5,096 (82.2%)

607 (9.8%)

Space Age

2,700

11,182 (avg. 4.1)

2,224 (82.4%)

47 (1.7%)

RNA Transcription

2,266

15,243 (avg. 6.7)

1,878 (82.9%)

66 (2.9%)

Binary

2,493

17,592 (avg. 7.1)

2,038 (81.7%)

77 (3.1%)

Eliud's Eggs

1,350

5,583 (avg. 4.1)

1,090 (80.7%)

14 (1.0%)

Two Fer

1,889

9,078 (avg. 4.8)

1,588 (84.1%)

24 (1.3%)

Raindrops

2,017

8,935 (avg. 4.4)

1,667 (82.6%)

38 (1.9%)

D&D Character

1,216

7,410 (avg. 6.1)

968 (79.6%)

22 (1.8%)

Perfect Numbers

1,483

6,770 (avg. 4.6)

1,173 (79.1%)

14 (0.9%)

High Scores

1,482

10,774 (avg. 7.3)

1,172 (79.1%)

33 (2.2%)

Pangram

2,372

12,746 (avg. 5.4)

1,876 (79.1%)

57 (2.4%)

Resistor Color Trio

1,905

10,536 (avg. 5.5)

1,457 (76.5%)

30 (1.6%)

Armstrong Numbers

21,505

115,313 (avg. 5.4)

9,159 (42.6%)

1,751 (8.1%)

Isogram

9,780

88,913 (avg. 9.1)

5,642 (57.7%)

1,426 (14.6%)

Binary Search

3,527

27,916 (avg. 7.9)

2,475 (70.2%)

208 (5.9%)

Robot Simulator

1,831

7,140 (avg. 3.9)

1,384 (75.6%)

52 (2.8%)

Gigasecond

2,182

5,187 (avg. 2.4)

1,715 (78.6%)

133 (6.1%)

Triangle

1,509

6,652 (avg. 4.4)

1,113 (73.8%)

13 (0.9%)

Luhn

1,447

12,752 (avg. 8.8)

1,083 (74.8%)

36 (2.5%)

Allergies

1,727

8,852 (avg. 5.1)

1,220 (70.6%)

60 (3.5%)

Complex Numbers

1,257

4,145 (avg. 3.3)

1,037 (82.5%)

8 (0.6%)

Sum of Multiples

1,354

6,582 (avg. 4.9)

1,043 (77.0%)

22 (1.6%)

Clock

1,628

11,440 (avg. 7.0)

1,125 (69.1%)

44 (2.7%)

Rotational Cipher

697

3,923 (avg. 5.6)

615 (88.2%)

6 (0.9%)

Sieve

1,465

7,135 (avg. 4.9)

1,162 (79.3%)

41 (2.8%)

Square Root

3,555

13,293 (avg. 3.7)

2,497 (70.2%)

216 (6.1%)

Reverse String

1,884

14,427 (avg. 7.7)

1,469 (78.0%)

43 (2.3%)

Nucleotide Count

1,432

9,064 (avg. 6.3)

1,147 (80.1%)

27 (1.9%)

Protein Translation

701

4,062 (avg. 5.8)

582 (83.0%)

6 (0.9%)

Beer Song

1,368

7,580 (avg. 5.5)

1,008 (73.7%)

117 (8.6%)

Prime Factors

1,011

2,752 (avg. 2.7)

808 (79.9%)

7 (0.7%)

Nth Prime

1,045

3,704 (avg. 3.5)

827 (79.1%)

10 (1.0%)

All Your Base

994

5,482 (avg. 5.5)

671 (67.5%)

11 (1.1%)

Yacht

571

2,959 (avg. 5.2)

492 (86.2%)

6 (1.1%)

Scrabble Score

1,075

3,645 (avg. 3.4)

915 (85.1%)

24 (2.2%)

Sublist

889

3,198 (avg. 3.6)

678 (76.3%)

12 (1.3%)

Kindergarten Garden

641

3,318 (avg. 5.2)

514 (80.2%)

8 (1.2%)

Spiral Matrix

567

2,776 (avg. 4.9)

425 (75.0%)

5 (0.9%)

Grade School

2,850

27,571 (avg. 9.7)

1,332 (46.7%)

166 (5.8%)

Rational Numbers

1,646

13,527 (avg. 8.2)

1,092 (66.3%)

87 (5.3%)

Circular Buffer

2,150

19,403 (avg. 9.0)

1,229 (57.2%)

106 (4.9%)

List Ops

1,774

11,765 (avg. 6.6)

1,112 (62.7%)

78 (4.4%)

Saddle Points

1,144

6,450 (avg. 5.6)

749 (65.5%)

38 (3.3%)

Phone Number

1,218

8,142 (avg. 6.7)

899 (73.8%)

53 (4.4%)

Pascal's Triangle

1,220

4,992 (avg. 4.1)

874 (71.6%)

39 (3.2%)

Acronym

2,502

11,145 (avg. 4.5)

1,767 (70.6%)

121 (4.8%)

Matching Brackets

1,196

4,038 (avg. 3.4)

901 (75.3%)

53 (4.4%)

Roman Numerals

1,396

21,526 (avg. 15.4)

1,016 (72.8%)

75 (5.4%)

Anagram

1,046

3,246 (avg. 3.1)

787 (75.2%)

16 (1.5%)

Bob

1,188

5,448 (avg. 4.6)

935 (78.7%)

22 (1.9%)

Secret Handshake

953

4,478 (avg. 4.7)

756 (79.3%)

19 (2.0%)

ETL

761

2,451 (avg. 3.2)

597 (78.4%)

9 (1.2%)

Series

898

3,087 (avg. 3.4)

684 (76.2%)

9 (1.0%)

Diamond

767

2,312 (avg. 3.0)

610 (79.5%)

8 (1.0%)

Minesweeper

782

2,709 (avg. 3.5)

582 (74.4%)

10 (1.3%)

Run-Length Encoding

743

3,010 (avg. 4.1)

564 (75.9%)

13 (1.7%)

Atbash Cipher

808

2,739 (avg. 3.4)

632 (78.2%)

34 (4.2%)

Pythagorean Triplet

1,352

6,353 (avg. 4.7)

788 (58.3%)

51 (3.8%)

Linked List

1,508

10,428 (avg. 6.9)

892 (59.2%)

84 (5.6%)

Word Count

2,012

5,379 (avg. 2.7)

1,097 (54.5%)

198 (9.8%)

Rail Fence Cipher

774

3,250 (avg. 4.2)

573 (74.0%)

10 (1.3%)

Meetup

1,047

2,033 (avg. 1.9)

701 (67.0%)

11 (1.1%)

Pig Latin

733

3,761 (avg. 5.1)

555 (75.7%)

12 (1.6%)

Wordy

716

2,776 (avg. 3.9)

549 (76.7%)

13 (1.8%)

Crypto Square

648

2,132 (avg. 3.3)

508 (78.4%)

4 (0.6%)

Largest Series Product

777

2,837 (avg. 3.7)

602 (77.5%)

10 (1.3%)

Zebra Puzzle

442

1,157 (avg. 2.6)

342 (77.4%)

1 (0.2%)

Two Bucket

599

2,385 (avg. 4.0)

427 (71.3%)

3 (0.5%)

Binary Search Tree

948

3,917 (avg. 4.1)

615 (64.9%)

36 (3.8%)

Say

671

2,638 (avg. 3.9)

491 (73.2%)

6 (0.9%)

Knapsack

464

1,751 (avg. 3.8)

333 (71.8%)

2 (0.4%)

Palindrome Products

825

3,026 (avg. 3.7)

516 (62.5%)

18 (2.2%)

React

1,221

4,528 (avg. 3.7)

464 (38.0%)

24 (2.0%)

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

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

Variable Length Quantity

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Word Search

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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.

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Test Runner

Learn More

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

Current version: 8d564506eaa4cbea22542e439afc5ec32ded3772 (Takes up to 10 mins to deploy)

Total Test Runner Runs

1,333,876

Test Run Pass Rate

15.5% (206366)

Test Run Fail Rate

22.1% (294582)

Test Run Error Rate

62.4% (832928)

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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