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

Students

141,366

Submissions

3,367,825

Mentoring Discussions

29,390

The Rust track is healthy ✅

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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: cc099ae090a6acbe6f53f1e36325263046ba333e (Updates should be instant)

Next goal: Implement 146 practice exercises. Find out more.

99 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

123,660

222,270 (avg. 1.8)

102,273 (82.7%)

28 (0.0%)

Reverse String

62,030

220,192 (avg. 3.5)

40,103 (64.7%)

5,104 (8.2%)

Gigasecond

41,482

124,773 (avg. 3.0)

31,354 (75.6%)

4,203 (10.1%)

Clock

25,470

230,673 (avg. 9.1)

17,599 (69.1%)

3,142 (12.3%)

Anagram

16,627

115,255 (avg. 6.9)

12,225 (73.5%)

2,190 (13.2%)

Space Age

11,806

46,372 (avg. 3.9)

9,522 (80.7%)

1,275 (10.8%)

Sublist

17,503

100,204 (avg. 5.7)

11,807 (67.5%)

1,333 (7.6%)

Flower Field

2,118

15,347 (avg. 7.2)

1,497 (70.7%)

50 (2.4%)

Luhn

8,769

60,708 (avg. 6.9)

7,294 (83.2%)

693 (7.9%)

Armstrong Numbers

15,803

78,955 (avg. 5.0)

13,125 (83.1%)

425 (2.7%)

Bottle Song

3,145

24,251 (avg. 7.7)

2,213 (70.4%)

49 (1.6%)

Difference of Squares

14,748

34,529 (avg. 2.3)

13,318 (90.3%)

269 (1.8%)

Grains

13,038

47,328 (avg. 3.6)

11,571 (88.7%)

158 (1.2%)

Leap

22,920

38,447 (avg. 1.7)

20,017 (87.3%)

497 (2.2%)

Nth Prime

15,983

51,485 (avg. 3.2)

11,922 (74.6%)

420 (2.6%)

Prime Factors

9,882

31,923 (avg. 3.2)

8,180 (82.8%)

119 (1.2%)

Proverb

10,834

31,222 (avg. 2.9)

9,292 (85.8%)

154 (1.4%)

Raindrops

18,456

35,200 (avg. 1.9)

16,092 (87.2%)

437 (2.4%)

Sum of Multiples

11,129

37,157 (avg. 3.3)

9,394 (84.4%)

169 (1.5%)

Bob

11,538

50,035 (avg. 4.3)

9,445 (81.9%)

878 (7.6%)

High Scores

8,574

51,006 (avg. 5.9)

6,802 (79.3%)

151 (1.8%)

Matching Brackets

9,013

35,356 (avg. 3.9)

7,384 (81.9%)

286 (3.2%)

Collatz Conjecture

5,932

21,641 (avg. 3.6)

5,106 (86.1%)

83 (1.4%)

Series

5,465

19,753 (avg. 3.6)

4,627 (84.7%)

60 (1.1%)

Kindergarten Garden

3,224

19,966 (avg. 6.2)

2,514 (78.0%)

53 (1.6%)

Eliud's Eggs

2,483

6,674 (avg. 2.7)

2,210 (89.0%)

18 (0.7%)

Acronym

6,100

35,004 (avg. 5.7)

4,678 (76.7%)

74 (1.2%)

All Your Base

4,295

19,527 (avg. 4.5)

3,380 (78.7%)

54 (1.3%)

Allergies

6,184

34,250 (avg. 5.5)

4,839 (78.3%)

138 (2.2%)

Alphametics

3,592

19,707 (avg. 5.5)

1,576 (43.9%)

67 (1.9%)

Binary Search

4,965

20,668 (avg. 4.2)

3,961 (79.8%)

55 (1.1%)

Bowling

3,841

26,982 (avg. 7.0)

2,141 (55.7%)

55 (1.4%)

DOT DSL

4,520

19,476 (avg. 4.3)

2,725 (60.3%)

72 (1.6%)

ETL

4,482

10,119 (avg. 2.3)

3,732 (83.3%)

36 (0.8%)

Grade School

3,809

15,148 (avg. 4.0)

3,124 (82.0%)

36 (0.9%)

Hamming

4,388

8,402 (avg. 1.9)

3,848 (87.7%)

67 (1.5%)

ISBN Verifier

3,486

15,156 (avg. 4.3)

2,814 (80.7%)

40 (1.1%)

Isogram

3,944

10,277 (avg. 2.6)

3,334 (84.5%)

33 (0.8%)

Nucleotide Count

4,521

14,029 (avg. 3.1)

3,834 (84.8%)

51 (1.1%)

PaaS I/O

3,822

6,668 (avg. 1.7)

2,378 (62.2%)

19 (0.5%)

Palindrome Products

2,346

11,221 (avg. 4.8)

1,617 (68.9%)

26 (1.1%)

Pangram

3,579

8,677 (avg. 2.4)

3,105 (86.8%)

48 (1.3%)

Pascal's Triangle

4,010

10,565 (avg. 2.6)

3,287 (82.0%)

37 (0.9%)

Perfect Numbers

2,671

7,095 (avg. 2.7)

2,237 (83.8%)

42 (1.6%)

Pig Latin

1,885

7,562 (avg. 4.0)

1,257 (66.7%)

17 (0.9%)

Queen Attack

3,168

7,270 (avg. 2.3)

2,643 (83.4%)

17 (0.5%)

RNA Transcription

3,896

10,913 (avg. 2.8)

3,233 (83.0%)

41 (1.1%)

Run-Length Encoding

3,209

12,228 (avg. 3.8)

2,508 (78.2%)

36 (1.1%)

Saddle Points

3,653

8,677 (avg. 2.4)

2,558 (70.0%)

309 (8.5%)

Say

2,504

8,131 (avg. 3.2)

1,696 (67.7%)

15 (0.6%)

Scrabble Score

3,124

6,763 (avg. 2.2)

2,656 (85.0%)

29 (0.9%)

Sieve

3,224

8,453 (avg. 2.6)

2,662 (82.6%)

33 (1.0%)

Simple Linked List

5,174

32,602 (avg. 6.3)

3,278 (63.4%)

137 (2.6%)

Spiral Matrix

1,887

5,869 (avg. 3.1)

1,316 (69.7%)

12 (0.6%)

Tournament

3,230

20,940 (avg. 6.5)

2,337 (72.4%)

66 (2.0%)

Triangle

3,074

8,238 (avg. 2.7)

2,519 (81.9%)

34 (1.1%)

Two Bucket

1,735

4,568 (avg. 2.6)

934 (53.8%)

17 (1.0%)

Variable Length Quantity

1,717

6,240 (avg. 3.6)

1,122 (65.3%)

7 (0.4%)

Robot Simulator

3,801

15,191 (avg. 4.0)

3,070 (80.8%)

47 (1.2%)

Robot Name

2,128

10,356 (avg. 4.9)

1,443 (67.8%)

45 (2.1%)

Protein Translation

2,095

9,157 (avg. 4.4)

1,503 (71.7%)

18 (0.9%)

Wordy

1,564

5,602 (avg. 3.6)

1,075 (68.7%)

8 (0.5%)

Custom Set

1,925

8,008 (avg. 4.2)

1,282 (66.6%)

19 (1.0%)

Accumulate

1,938

6,856 (avg. 3.5)

1,457 (75.2%)

33 (1.7%)

Affine Cipher

1,307

6,537 (avg. 5.0)

867 (66.3%)

7 (0.5%)

Atbash Cipher

2,710

7,981 (avg. 2.9)

2,068 (76.3%)

802 (29.6%)

Crypto Square

1,532

5,143 (avg. 3.4)

1,032 (67.4%)

7 (0.5%)

Diamond

1,362

4,498 (avg. 3.3)

957 (70.3%)

1 (0.1%)

Largest Series Product

1,814

5,381 (avg. 3.0)

1,404 (77.4%)

19 (1.0%)

Luhn From

1,836

4,261 (avg. 2.3)

1,339 (72.9%)

13 (0.7%)

Luhn Trait

1,634

2,351 (avg. 1.4)

1,206 (73.8%)

7 (0.4%)

List Ops

459

2,311 (avg. 5.0)

301 (65.6%)

4 (0.9%)

Phone Number

1,688

5,442 (avg. 3.2)

1,269 (75.2%)

21 (1.2%)

Rail Fence Cipher

1,240

4,541 (avg. 3.7)

765 (61.7%)

5 (0.4%)

Roman Numerals

1,924

5,590 (avg. 2.9)

1,425 (74.1%)

15 (0.8%)

Rotational Cipher

1,625

3,475 (avg. 2.1)

1,242 (76.4%)

14 (0.9%)

Simple Cipher

1,403

5,429 (avg. 3.9)

911 (64.9%)

9 (0.6%)

Word Count

2,540

9,564 (avg. 3.8)

1,999 (78.7%)

47 (1.9%)

Secret Handshake

1,007

2,807 (avg. 2.8)

773 (76.8%)

16 (1.6%)

Knapsack

850

3,566 (avg. 4.2)

560 (65.9%)

6 (0.7%)

Yacht

955

6,833 (avg. 7.2)

690 (72.3%)

12 (1.3%)

Matrix

623

2,255 (avg. 3.6)

462 (74.2%)

4 (0.6%)

Fizzy

1,678

9,654 (avg. 5.8)

885 (52.7%)

20 (1.2%)

Pythagorean Triplet

4,388

8,640 (avg. 2.0)

2,477 (56.4%)

1,320 (30.1%)

Parallel Letter Frequency

4,728

26,103 (avg. 5.5)

2,954 (62.5%)

551 (11.7%)

Macros

3,574

17,896 (avg. 5.0)

2,642 (73.9%)

327 (9.1%)

POV

261

1,420 (avg. 5.4)

121 (46.4%)

1 (0.4%)

Poker

4,629

28,675 (avg. 6.2)

1,570 (33.9%)

275 (5.9%)

Forth

2,417

17,849 (avg. 7.4)

1,180 (48.8%)

184 (7.6%)

OCR Numbers

1,428

4,740 (avg. 3.3)

843 (59.0%)

16 (1.1%)

React

2,147

7,999 (avg. 3.7)

752 (35.0%)

31 (1.4%)

Circular Buffer

2,227

8,972 (avg. 4.0)

1,391 (62.5%)

55 (2.5%)

Rectangles

1,455

6,029 (avg. 4.1)

778 (53.5%)

17 (1.2%)

Xorcism

1,343

6,864 (avg. 5.1)

574 (42.7%)

32 (2.4%)

Book Store

1,099

3,293 (avg. 3.0)

520 (47.3%)

8 (0.7%)

Decimal

1,324

6,804 (avg. 5.1)

566 (42.7%)

7 (0.5%)

Grep

1,315

5,675 (avg. 4.3)

679 (51.6%)

11 (0.8%)

Dominoes

1,281

4,655 (avg. 3.6)

640 (50.0%)

21 (1.6%)

Doubly Linked List

1,482

6,386 (avg. 4.3)

465 (31.4%)

29 (2.0%)

7 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

14,211

79,242 (avg. 5.6)

11,186 (78.7%)

256 (1.8%)

Diffie-Hellman

4,014

16,946 (avg. 4.2)

2,779 (69.2%)

57 (1.4%)

Hexadecimal

120

184 (avg. 1.5)

114 (95.0%)

10 (8.3%)

Minesweeper

7,798

56,646 (avg. 7.3)

5,286 (67.8%)

803 (10.3%)

Nucleotide Codons

133

157 (avg. 1.2)

129 (97.0%)

1 (0.8%)

Scale Generator

1,132

4,529 (avg. 4.0)

500 (44.2%)

9 (0.8%)

Two Fer

28 (avg. 1.2)

4 (17.4%)

1 (4.3%)

47 unimplemented practice exercises

Baffling Birthdays

Bank Account

Binary Search Tree

Camicia

Change

Complex Numbers

Connect

Conway's Game of Life

D&D Character

Darts

Error Handling

Flatten Array

Food Chain

Go Counting

House

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Line Up

Linked List

Markdown

Meetup

Micro Blog

Piecing It Together

Prism

Rational Numbers

Relative Distance

Resistor Color

Resistor Color Duo

Resistor Color Tolerance

Resistor Color Trio

REST API

Satellite

Save the Cow

SGF Parsing

Split-Second Stopwatch

Square Root

State of Tic-Tac-Toe

Strain

Swift Scheduling

Transpose

Tree Building

Twelve Days

Word Search

Zebra Puzzle

Zipper

3 foregone practice exercises

Binary

View data

Octal

View data

Trinary

View data

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: 603a5102f436adc952bf550bb3362994fa6f7772 (Takes up to 10 mins to deploy)

Total Test Runner Runs

3,237,503

Test Run Pass Rate

25.4% (822749)

Test Run Fail Rate

22.8% (737204)

Test Run Error Rate

51.8% (1677550)

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.

Current version: 6044a4e600e2f04e403317374ec75faf47241333 (Takes up to 10 mins to deploy)

Total Representer Runs

1,090,202

Total Representation Comments Made

82,621

Feedback Given Frequency

7.6%

Analyzer

Learn More

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

Current version: 4a99033485bcff13f489fb496f650aaa67968a36 (Takes up to 10 mins to deploy)

Total Analyzer Runs

801,188

Total Analysis Comments Made

246,679

Feedback Given Frequency

3.5%

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