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

Students

141,107

Submissions

3,360,170

Mentoring Discussions

29,385

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 145 practice exercises. Find out more.

99 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

123,394

221,713 (avg. 1.8)

102,077 (82.7%)

28 (0.0%)

Reverse String

61,873

219,628 (avg. 3.5)

40,026 (64.7%)

5,101 (8.2%)

Gigasecond

41,393

124,470 (avg. 3.0)

31,284 (75.6%)

4,203 (10.2%)

Clock

25,415

230,048 (avg. 9.1)

17,560 (69.1%)

3,141 (12.4%)

Anagram

16,593

114,998 (avg. 6.9)

12,196 (73.5%)

2,190 (13.2%)

Space Age

11,780

46,251 (avg. 3.9)

9,492 (80.6%)

1,275 (10.8%)

Sublist

17,480

100,037 (avg. 5.7)

11,793 (67.5%)

1,333 (7.6%)

Flower Field

2,099

15,113 (avg. 7.2)

1,485 (70.7%)

49 (2.3%)

Luhn

8,751

60,492 (avg. 6.9)

7,279 (83.2%)

693 (7.9%)

Armstrong Numbers

15,773

78,782 (avg. 5.0)

13,099 (83.0%)

424 (2.7%)

Bottle Song

3,116

24,088 (avg. 7.7)

2,195 (70.4%)

49 (1.6%)

Difference of Squares

14,723

34,473 (avg. 2.3)

13,298 (90.3%)

269 (1.8%)

Grains

13,017

47,263 (avg. 3.6)

11,551 (88.7%)

158 (1.2%)

Leap

22,900

38,348 (avg. 1.7)

20,001 (87.3%)

497 (2.2%)

Nth Prime

15,965

51,327 (avg. 3.2)

11,904 (74.6%)

420 (2.6%)

Prime Factors

9,866

31,833 (avg. 3.2)

8,166 (82.8%)

119 (1.2%)

Proverb

10,822

31,190 (avg. 2.9)

9,281 (85.8%)

154 (1.4%)

Raindrops

18,434

35,111 (avg. 1.9)

16,071 (87.2%)

437 (2.4%)

Sum of Multiples

11,117

37,045 (avg. 3.3)

9,383 (84.4%)

169 (1.5%)

Bob

11,520

49,912 (avg. 4.3)

9,435 (81.9%)

878 (7.6%)

High Scores

8,559

50,790 (avg. 5.9)

6,791 (79.3%)

151 (1.8%)

Matching Brackets

8,996

35,210 (avg. 3.9)

7,375 (82.0%)

286 (3.2%)

Collatz Conjecture

5,916

21,543 (avg. 3.6)

5,094 (86.1%)

83 (1.4%)

Series

5,458

19,711 (avg. 3.6)

4,619 (84.6%)

60 (1.1%)

Kindergarten Garden

3,213

19,881 (avg. 6.2)

2,507 (78.0%)

53 (1.6%)

Eliud's Eggs

2,474

6,642 (avg. 2.7)

2,203 (89.0%)

18 (0.7%)

Acronym

6,092

34,788 (avg. 5.7)

4,672 (76.7%)

74 (1.2%)

All Your Base

4,285

19,375 (avg. 4.5)

3,374 (78.7%)

54 (1.3%)

Allergies

6,178

34,198 (avg. 5.5)

4,834 (78.2%)

138 (2.2%)

Alphametics

3,588

19,631 (avg. 5.5)

1,572 (43.8%)

67 (1.9%)

Binary Search

4,959

20,648 (avg. 4.2)

3,955 (79.8%)

55 (1.1%)

Bowling

3,834

26,776 (avg. 7.0)

2,136 (55.7%)

55 (1.4%)

DOT DSL

4,510

19,279 (avg. 4.3)

2,718 (60.3%)

72 (1.6%)

ETL

4,473

10,034 (avg. 2.2)

3,723 (83.2%)

36 (0.8%)

Grade School

3,795

15,097 (avg. 4.0)

3,114 (82.1%)

36 (0.9%)

Hamming

4,377

8,367 (avg. 1.9)

3,837 (87.7%)

67 (1.5%)

ISBN Verifier

3,474

15,078 (avg. 4.3)

2,801 (80.6%)

39 (1.1%)

Isogram

3,929

10,240 (avg. 2.6)

3,319 (84.5%)

33 (0.8%)

Nucleotide Count

4,509

13,944 (avg. 3.1)

3,823 (84.8%)

51 (1.1%)

PaaS I/O

3,812

6,658 (avg. 1.7)

2,373 (62.3%)

19 (0.5%)

Palindrome Products

2,340

11,046 (avg. 4.7)

1,612 (68.9%)

26 (1.1%)

Pangram

3,573

8,652 (avg. 2.4)

3,100 (86.8%)

48 (1.3%)

Pascal's Triangle

4,003

10,528 (avg. 2.6)

3,281 (82.0%)

37 (0.9%)

Perfect Numbers

2,667

7,025 (avg. 2.6)

2,233 (83.7%)

42 (1.6%)

Pig Latin

1,879

7,516 (avg. 4.0)

1,253 (66.7%)

17 (0.9%)

Queen Attack

3,164

7,264 (avg. 2.3)

2,639 (83.4%)

17 (0.5%)

RNA Transcription

3,892

10,894 (avg. 2.8)

3,227 (82.9%)

41 (1.1%)

Run-Length Encoding

3,200

12,195 (avg. 3.8)

2,500 (78.1%)

36 (1.1%)

Saddle Points

3,649

8,672 (avg. 2.4)

2,555 (70.0%)

309 (8.5%)

Say

2,501

8,124 (avg. 3.2)

1,692 (67.7%)

15 (0.6%)

Scrabble Score

3,119

6,748 (avg. 2.2)

2,651 (85.0%)

29 (0.9%)

Sieve

3,217

8,403 (avg. 2.6)

2,656 (82.6%)

33 (1.0%)

Simple Linked List

5,167

32,594 (avg. 6.3)

3,273 (63.3%)

137 (2.7%)

Spiral Matrix

1,884

5,866 (avg. 3.1)

1,313 (69.7%)

12 (0.6%)

Tournament

3,224

20,919 (avg. 6.5)

2,331 (72.3%)

66 (2.0%)

Triangle

3,066

8,186 (avg. 2.7)

2,512 (81.9%)

34 (1.1%)

Two Bucket

1,730

4,494 (avg. 2.6)

932 (53.9%)

17 (1.0%)

Variable Length Quantity

1,713

6,214 (avg. 3.6)

1,120 (65.4%)

7 (0.4%)

Robot Simulator

3,789

15,119 (avg. 4.0)

3,063 (80.8%)

47 (1.2%)

Robot Name

2,124

10,313 (avg. 4.9)

1,438 (67.7%)

45 (2.1%)

Protein Translation

2,087

9,121 (avg. 4.4)

1,497 (71.7%)

18 (0.9%)

Wordy

1,558

5,577 (avg. 3.6)

1,069 (68.6%)

8 (0.5%)

Custom Set

1,919

7,945 (avg. 4.1)

1,278 (66.6%)

19 (1.0%)

Accumulate

1,935

6,846 (avg. 3.5)

1,454 (75.1%)

33 (1.7%)

Affine Cipher

1,304

6,508 (avg. 5.0)

864 (66.3%)

7 (0.5%)

Atbash Cipher

2,707

7,975 (avg. 2.9)

2,065 (76.3%)

802 (29.6%)

Crypto Square

1,527

5,125 (avg. 3.4)

1,028 (67.3%)

7 (0.5%)

Diamond

1,358

4,492 (avg. 3.3)

953 (70.2%)

1 (0.1%)

Largest Series Product

1,808

5,370 (avg. 3.0)

1,400 (77.4%)

19 (1.1%)

Luhn From

1,832

4,253 (avg. 2.3)

1,335 (72.9%)

13 (0.7%)

Luhn Trait

1,630

2,347 (avg. 1.4)

1,202 (73.7%)

7 (0.4%)

List Ops

455

2,277 (avg. 5.0)

298 (65.5%)

4 (0.9%)

Phone Number

1,682

5,383 (avg. 3.2)

1,264 (75.1%)

21 (1.2%)

Rail Fence Cipher

1,234

4,505 (avg. 3.7)

762 (61.8%)

5 (0.4%)

Roman Numerals

1,919

5,546 (avg. 2.9)

1,419 (73.9%)

15 (0.8%)

Rotational Cipher

1,621

3,468 (avg. 2.1)

1,238 (76.4%)

14 (0.9%)

Simple Cipher

1,398

5,390 (avg. 3.9)

906 (64.8%)

9 (0.6%)

Word Count

2,535

9,553 (avg. 3.8)

1,996 (78.7%)

47 (1.9%)

Secret Handshake

1,004

2,803 (avg. 2.8)

770 (76.7%)

16 (1.6%)

Knapsack

846

3,553 (avg. 4.2)

557 (65.8%)

6 (0.7%)

Yacht

951

6,822 (avg. 7.2)

686 (72.1%)

11 (1.2%)

Matrix

618

2,243 (avg. 3.6)

456 (73.8%)

4 (0.6%)

Fizzy

1,671

9,632 (avg. 5.8)

880 (52.7%)

20 (1.2%)

Pythagorean Triplet

4,382

8,617 (avg. 2.0)

2,472 (56.4%)

1,320 (30.1%)

Parallel Letter Frequency

4,725

26,094 (avg. 5.5)

2,951 (62.5%)

551 (11.7%)

Macros

3,568

17,846 (avg. 5.0)

2,635 (73.9%)

327 (9.2%)

POV

257

1,361 (avg. 5.3)

117 (45.5%)

1 (0.4%)

Poker

4,624

28,671 (avg. 6.2)

1,567 (33.9%)

275 (5.9%)

Forth

2,414

17,848 (avg. 7.4)

1,179 (48.8%)

184 (7.6%)

OCR Numbers

1,425

4,732 (avg. 3.3)

840 (58.9%)

16 (1.1%)

React

2,145

7,998 (avg. 3.7)

751 (35.0%)

31 (1.4%)

Circular Buffer

2,225

8,969 (avg. 4.0)

1,389 (62.4%)

55 (2.5%)

Rectangles

1,454

6,028 (avg. 4.1)

777 (53.4%)

17 (1.2%)

Xorcism

1,341

6,862 (avg. 5.1)

572 (42.7%)

32 (2.4%)

Book Store

1,095

3,281 (avg. 3.0)

518 (47.3%)

8 (0.7%)

Decimal

1,319

6,758 (avg. 5.1)

562 (42.6%)

7 (0.5%)

Grep

1,313

5,661 (avg. 4.3)

676 (51.5%)

11 (0.8%)

Dominoes

1,278

4,654 (avg. 3.6)

639 (50.0%)

21 (1.6%)

Doubly Linked List

1,479

6,384 (avg. 4.3)

463 (31.3%)

29 (2.0%)

7 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

14,211

79,241 (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%)

46 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 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

3,229,852

Test Run Pass Rate

25.4% (821024)

Test Run Fail Rate

22.8% (735460)

Test Run Error Rate

51.8% (1673368)

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

1,088,659

Total Representation Comments Made

82,384

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

799,652

Total Analysis Comments Made

245,692

Feedback Given Frequency

3.5%

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