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

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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: 5deb659b82533b975c361b4045b5540d01ae9952 (Updates should be instant)

Next goal: Implement 141 practice exercises. Find out more.

98 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

100,785

179,570 (avg. 1.8)

86,103 (85.4%)

28 (0.0%)

Reverse String

48,948

170,890 (avg. 3.5)

32,355 (66.1%)

4,813 (9.8%)

Gigasecond

33,507

98,263 (avg. 2.9)

25,841 (77.1%)

4,106 (12.3%)

Clock

20,798

184,260 (avg. 8.9)

14,417 (69.3%)

3,016 (14.5%)

Anagram

13,235

92,369 (avg. 7.0)

9,704 (73.3%)

2,073 (15.7%)

Space Age

9,324

36,202 (avg. 3.9)

7,514 (80.6%)

1,232 (13.2%)

Sublist

15,336

88,900 (avg. 5.8)

9,988 (65.1%)

1,294 (8.4%)

Minesweeper

7,540

53,733 (avg. 7.1)

5,063 (67.1%)

798 (10.6%)

Luhn

7,060

47,538 (avg. 6.7)

5,847 (82.8%)

653 (9.2%)

Armstrong Numbers

12,929

64,904 (avg. 5.0)

10,667 (82.5%)

348 (2.7%)

Bottle Song

618

4,540 (avg. 7.3)

426 (68.9%)

8 (1.3%)

Difference of Squares

12,630

28,074 (avg. 2.2)

11,419 (90.4%)

248 (2.0%)

Grains

11,099

38,432 (avg. 3.5)

9,811 (88.4%)

147 (1.3%)

Leap

21,002

32,849 (avg. 1.6)

18,259 (86.9%)

484 (2.3%)

Nth Prime

14,305

42,164 (avg. 2.9)

10,520 (73.5%)

389 (2.7%)

Prime Factors

8,358

24,876 (avg. 3.0)

6,890 (82.4%)

97 (1.2%)

Proverb

9,559

25,440 (avg. 2.7)

8,141 (85.2%)

147 (1.5%)

Raindrops

16,929

30,162 (avg. 1.8)

14,705 (86.9%)

423 (2.5%)

Sum of Multiples

9,723

30,120 (avg. 3.1)

8,178 (84.1%)

158 (1.6%)

Bob

10,184

41,001 (avg. 4.0)

8,277 (81.3%)

867 (8.5%)

High Scores

7,157

41,397 (avg. 5.8)

5,624 (78.6%)

137 (1.9%)

Matching Brackets

7,675

28,631 (avg. 3.7)

6,244 (81.4%)

276 (3.6%)

Collatz Conjecture

4,611

16,998 (avg. 3.7)

3,898 (84.5%)

71 (1.5%)

Series

4,257

14,647 (avg. 3.4)

3,541 (83.2%)

53 (1.2%)

Kindergarten Garden

2,096

12,430 (avg. 5.9)

1,562 (74.5%)

43 (2.1%)

Eliud's Eggs

1,342

3,559 (avg. 2.7)

1,172 (87.3%)

11 (0.8%)

Acronym

4,986

26,719 (avg. 5.4)

3,780 (75.8%)

61 (1.2%)

All Your Base

3,360

14,318 (avg. 4.3)

2,585 (76.9%)

46 (1.4%)

Allergies

5,296

29,959 (avg. 5.7)

4,065 (76.8%)

124 (2.3%)

Alphametics

2,813

14,680 (avg. 5.2)

1,164 (41.4%)

58 (2.1%)

Binary Search

4,034

15,792 (avg. 3.9)

3,168 (78.5%)

46 (1.1%)

Bowling

3,136

19,936 (avg. 6.4)

1,721 (54.9%)

44 (1.4%)

DOT DSL

3,936

15,287 (avg. 3.9)

2,341 (59.5%)

64 (1.6%)

ETL

3,565

7,107 (avg. 2.0)

2,955 (82.9%)

31 (0.9%)

Grade School

3,193

11,610 (avg. 3.6)

2,630 (82.4%)

34 (1.1%)

Hamming

3,710

6,731 (avg. 1.8)

3,252 (87.7%)

60 (1.6%)

ISBN Verifier

2,885

11,366 (avg. 3.9)

2,298 (79.7%)

29 (1.0%)

Isogram

3,350

8,467 (avg. 2.5)

2,815 (84.0%)

31 (0.9%)

Nucleotide Count

3,931

11,279 (avg. 2.9)

3,322 (84.5%)

46 (1.2%)

PaaS I/O

3,237

5,163 (avg. 1.6)

1,954 (60.4%)

18 (0.6%)

Palindrome Products

1,873

8,232 (avg. 4.4)

1,256 (67.1%)

24 (1.3%)

Pangram

3,038

7,031 (avg. 2.3)

2,620 (86.2%)

44 (1.4%)

Pascal's Triangle

3,530

8,349 (avg. 2.4)

2,884 (81.7%)

35 (1.0%)

Perfect Numbers

2,202

5,330 (avg. 2.4)

1,824 (82.8%)

38 (1.7%)

Pig Latin

1,470

4,873 (avg. 3.3)

932 (63.4%)

14 (1.0%)

Queen Attack

2,710

6,058 (avg. 2.2)

2,261 (83.4%)

16 (0.6%)

RNA Transcription

3,401

8,900 (avg. 2.6)

2,809 (82.6%)

39 (1.1%)

Run-Length Encoding

2,737

9,297 (avg. 3.4)

2,119 (77.4%)

34 (1.2%)

Saddle Points

3,256

6,760 (avg. 2.1)

2,235 (68.6%)

309 (9.5%)

Say

2,138

6,073 (avg. 2.8)

1,410 (65.9%)

15 (0.7%)

Scrabble Score

2,672

5,373 (avg. 2.0)

2,260 (84.6%)

27 (1.0%)

Sieve

2,818

6,750 (avg. 2.4)

2,322 (82.4%)

32 (1.1%)

Simple Linked List

4,475

26,912 (avg. 6.0)

2,829 (63.2%)

129 (2.9%)

Spiral Matrix

1,533

4,356 (avg. 2.8)

1,031 (67.3%)

11 (0.7%)

Tournament

2,872

18,829 (avg. 6.6)

2,062 (71.8%)

66 (2.3%)

Triangle

2,611

6,513 (avg. 2.5)

2,138 (81.9%)

28 (1.1%)

Two Bucket

1,415

2,841 (avg. 2.0)

742 (52.4%)

14 (1.0%)

Variable Length Quantity

1,405

4,418 (avg. 3.1)

903 (64.3%)

6 (0.4%)

Robot Simulator

3,335

13,344 (avg. 4.0)

2,711 (81.3%)

47 (1.4%)

Robot Name

1,722

7,474 (avg. 4.3)

1,166 (67.7%)

40 (2.3%)

Protein Translation

1,699

7,067 (avg. 4.2)

1,184 (69.7%)

18 (1.1%)

Wordy

1,241

4,200 (avg. 3.4)

831 (67.0%)

8 (0.6%)

Custom Set

1,556

5,993 (avg. 3.9)

1,023 (65.7%)

16 (1.0%)

Accumulate

1,551

5,454 (avg. 3.5)

1,150 (74.1%)

33 (2.1%)

Affine Cipher

1,005

4,659 (avg. 4.6)

651 (64.8%)

6 (0.6%)

Atbash Cipher

2,410

6,624 (avg. 2.7)

1,825 (75.7%)

801 (33.2%)

Crypto Square

1,240

3,540 (avg. 2.9)

816 (65.8%)

6 (0.5%)

Diamond

1,067

3,189 (avg. 3.0)

724 (67.9%)

1 (0.1%)

Largest Series Product

1,506

4,162 (avg. 2.8)

1,165 (77.4%)

19 (1.3%)

Luhn From

1,487

3,274 (avg. 2.2)

1,070 (72.0%)

10 (0.7%)

Luhn Trait

1,305

1,789 (avg. 1.4)

948 (72.6%)

5 (0.4%)

List Ops

106

590 (avg. 5.6)

68 (64.2%)

2 (1.9%)

Phone Number

1,367

4,201 (avg. 3.1)

1,014 (74.2%)

20 (1.5%)

Rail Fence Cipher

989

3,277 (avg. 3.3)

591 (59.8%)

5 (0.5%)

Roman Numerals

1,607

4,427 (avg. 2.8)

1,175 (73.1%)

13 (0.8%)

Rotational Cipher

1,348

2,752 (avg. 2.0)

1,019 (75.6%)

14 (1.0%)

Simple Cipher

1,122

3,908 (avg. 3.5)

704 (62.7%)

7 (0.6%)

Word Count

2,175

7,477 (avg. 3.4)

1,723 (79.2%)

46 (2.1%)

Secret Handshake

734

2,167 (avg. 3.0)

554 (75.5%)

15 (2.0%)

Knapsack

575

2,437 (avg. 4.2)

359 (62.4%)

4 (0.7%)

Yacht

696

5,447 (avg. 7.8)

496 (71.3%)

10 (1.4%)

Matrix

338

1,176 (avg. 3.5)

241 (71.3%)

1 (0.3%)

Fizzy

1,335

7,871 (avg. 5.9)

669 (50.1%)

18 (1.3%)

Pythagorean Triplet

4,087

7,618 (avg. 1.9)

2,236 (54.7%)

1,319 (32.3%)

Parallel Letter Frequency

4,350

24,051 (avg. 5.5)

2,698 (62.0%)

541 (12.4%)

Macros

3,271

16,654 (avg. 5.1)

2,427 (74.2%)

323 (9.9%)

Poker

4,386

27,417 (avg. 6.3)

1,446 (33.0%)

273 (6.2%)

Forth

2,192

16,560 (avg. 7.6)

1,057 (48.2%)

180 (8.2%)

OCR Numbers

1,228

3,991 (avg. 3.3)

717 (58.4%)

14 (1.1%)

React

1,861

6,642 (avg. 3.6)

637 (34.2%)

31 (1.7%)

Circular Buffer

1,908

7,642 (avg. 4.0)

1,186 (62.2%)

50 (2.6%)

Rectangles

1,274

4,828 (avg. 3.8)

660 (51.8%)

15 (1.2%)

Xorcism

1,108

5,469 (avg. 4.9)

431 (38.9%)

29 (2.6%)

Book Store

889

2,340 (avg. 2.6)

398 (44.8%)

6 (0.7%)

Decimal

1,081

4,816 (avg. 4.5)

443 (41.0%)

7 (0.6%)

Grep

1,069

4,447 (avg. 4.2)

520 (48.6%)

9 (0.8%)

Dominoes

1,037

3,735 (avg. 3.6)

505 (48.7%)

20 (1.9%)

Doubly Linked List

1,187

4,503 (avg. 3.8)

345 (29.1%)

25 (2.1%)

6 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

14,211

78,925 (avg. 5.6)

11,149 (78.5%)

255 (1.8%)

Diffie-Hellman

4,014

16,870 (avg. 4.2)

2,765 (68.9%)

57 (1.4%)

Hexadecimal

120

184 (avg. 1.5)

114 (95.0%)

10 (8.3%)

Nucleotide Codons

133

157 (avg. 1.2)

129 (97.0%)

1 (0.8%)

Scale Generator

1,132

4,440 (avg. 3.9)

499 (44.1%)

9 (0.8%)

Two Fer

28 (avg. 1.2)

4 (17.4%)

1 (4.3%)

43 unimplemented practice exercises

Baffling Birthdays

Bank Account

Binary Search Tree

Change

Complex Numbers

Connect

Conway's Game of Life

D&D Character

Darts

Error Handling

Flatten Array

Food Chain

Go Counting

Hangman

House

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Linked List

Markdown

Meetup

Micro Blog

POV

Rational Numbers

Relative Distance

Resistor Color

Resistor Color Duo

Resistor Color Trio

REST API

Satellite

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

Programming Tags

Learn More

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

0 tags

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: 816935839944013cc47b0b42e54ae5d09968b219 (Takes up to 10 mins to deploy)

Total Test Runner Runs

2,709,057

Test Run Pass Rate

24.8% (672907)

Test Run Fail Rate

22.8% (616654)

Test Run Error Rate

52.4% (1419496)

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: 82ccdeb7eb379e9f5794dd42a85fb32551d8ce95 (Takes up to 10 mins to deploy)

Total Representer Runs

959,252

Total Representation Comments Made

62,799

Feedback Given Frequency

6.5%

Analyzer

Learn More

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

Current version: be623c1493fa08f6f980e93bd33a98ee9cad778f (Takes up to 10 mins to deploy)

Total Analyzer Runs

670,548

Total Analysis Comments Made

171,681

Feedback Given Frequency

2.9%

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