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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: e327f2c9aa87549cf845b83c3f72804ef5e385e6 (Updates should be instant)

Next goal: Implement 138 practice exercises. Find out more.

98 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

80,896

141,350 (avg. 1.7)

71,193 (88.0%)

28 (0.0%)

Reverse String

36,144

116,274 (avg. 3.2)

24,774 (68.5%)

4,500 (12.5%)

Gigasecond

26,027

71,209 (avg. 2.7)

20,582 (79.1%)

3,998 (15.4%)

Clock

16,403

133,894 (avg. 8.2)

11,530 (70.3%)

2,880 (17.6%)

Anagram

10,101

66,296 (avg. 6.6)

7,434 (73.6%)

1,933 (19.1%)

Space Age

7,103

26,354 (avg. 3.7)

5,705 (80.3%)

1,170 (16.5%)

Sublist

13,413

77,551 (avg. 5.8)

8,387 (62.5%)

1,246 (9.3%)

Minesweeper

5,776

37,663 (avg. 6.5)

3,838 (66.4%)

725 (12.6%)

Luhn

5,492

33,398 (avg. 6.1)

4,529 (82.5%)

620 (11.3%)

Parallel Letter Frequency

4,006

22,572 (avg. 5.6)

2,463 (61.5%)

520 (13.0%)

Macros

3,008

15,350 (avg. 5.1)

2,246 (74.7%)

317 (10.5%)

Poker

4,167

25,433 (avg. 6.1)

1,337 (32.1%)

270 (6.5%)

Forth

1,976

15,622 (avg. 7.9)

938 (47.5%)

175 (8.9%)

Armstrong Numbers

10,037

46,661 (avg. 4.6)

8,265 (82.3%)

262 (2.6%)

Beer Song

12,301

59,988 (avg. 4.9)

9,650 (78.4%)

221 (1.8%)

Difference of Squares

10,589

21,544 (avg. 2.0)

9,583 (90.5%)

224 (2.1%)

Grains

9,190

28,241 (avg. 3.1)

8,106 (88.2%)

136 (1.5%)

Leap

19,190

27,634 (avg. 1.4)

16,601 (86.5%)

475 (2.5%)

Nth Prime

12,679

32,147 (avg. 2.5)

9,225 (72.8%)

361 (2.8%)

Prime Factors

7,001

17,590 (avg. 2.5)

5,745 (82.1%)

81 (1.2%)

Proverb

8,338

19,707 (avg. 2.4)

7,048 (84.5%)

129 (1.5%)

Raindrops

15,475

25,517 (avg. 1.6)

13,370 (86.4%)

404 (2.6%)

Sum of Multiples

8,470

23,303 (avg. 2.8)

7,112 (84.0%)

140 (1.7%)

Bob

8,936

32,158 (avg. 3.6)

7,226 (80.9%)

852 (9.5%)

High Scores

5,804

30,989 (avg. 5.3)

4,535 (78.1%)

109 (1.9%)

Matching Brackets

6,454

21,692 (avg. 3.4)

5,203 (80.6%)

263 (4.1%)

Acronym

3,950

18,812 (avg. 4.8)

2,973 (75.3%)

51 (1.3%)

All Your Base

2,536

9,763 (avg. 3.8)

1,941 (76.5%)

40 (1.6%)

Allergies

4,496

25,190 (avg. 5.6)

3,399 (75.6%)

118 (2.6%)

Alphametics

2,176

8,753 (avg. 4.0)

885 (40.7%)

46 (2.1%)

Binary Search

3,220

11,429 (avg. 3.5)

2,501 (77.7%)

41 (1.3%)

Bowling

2,583

13,797 (avg. 5.3)

1,430 (55.4%)

33 (1.3%)

DOT DSL

3,459

11,536 (avg. 3.3)

2,047 (59.2%)

52 (1.5%)

ETL

3,066

5,880 (avg. 1.9)

2,546 (83.0%)

31 (1.0%)

Grade School

2,736

9,241 (avg. 3.4)

2,260 (82.6%)

33 (1.2%)

Hamming

3,166

5,507 (avg. 1.7)

2,788 (88.1%)

56 (1.8%)

ISBN Verifier

2,391

8,649 (avg. 3.6)

1,896 (79.3%)

26 (1.1%)

Isogram

2,807

6,528 (avg. 2.3)

2,346 (83.6%)

24 (0.9%)

Nucleotide Count

3,452

9,420 (avg. 2.7)

2,934 (85.0%)

44 (1.3%)

PaaS I/O

2,722

3,860 (avg. 1.4)

1,642 (60.3%)

16 (0.6%)

Palindrome Products

1,510

6,453 (avg. 4.3)

1,000 (66.2%)

21 (1.4%)

Pangram

2,573

5,616 (avg. 2.2)

2,241 (87.1%)

44 (1.7%)

Pascal's Triangle

3,144

6,699 (avg. 2.1)

2,575 (81.9%)

31 (1.0%)

Perfect Numbers

1,849

4,189 (avg. 2.3)

1,536 (83.1%)

37 (2.0%)

Pig Latin

1,127

3,066 (avg. 2.7)

697 (61.8%)

8 (0.7%)

Queen Attack

2,351

4,945 (avg. 2.1)

1,966 (83.6%)

15 (0.6%)

RNA Transcription

2,988

7,696 (avg. 2.6)

2,475 (82.8%)

39 (1.3%)

Run-Length Encoding

2,333

6,746 (avg. 2.9)

1,805 (77.4%)

32 (1.4%)

Saddle Points

2,949

5,187 (avg. 1.8)

2,005 (68.0%)

309 (10.5%)

Say

1,844

4,488 (avg. 2.4)

1,213 (65.8%)

13 (0.7%)

Scrabble Score

2,301

4,367 (avg. 1.9)

1,958 (85.1%)

26 (1.1%)

Sieve

2,485

5,641 (avg. 2.3)

2,052 (82.6%)

29 (1.2%)

Simple Linked List

3,860

21,275 (avg. 5.5)

2,514 (65.1%)

120 (3.1%)

Spiral Matrix

1,252

3,234 (avg. 2.6)

835 (66.7%)

9 (0.7%)

Tournament

2,583

17,161 (avg. 6.6)

1,865 (72.2%)

65 (2.5%)

Triangle

2,278

5,463 (avg. 2.4)

1,879 (82.5%)

26 (1.1%)

Two Bucket

1,168

2,199 (avg. 1.9)

606 (51.9%)

13 (1.1%)

Variable Length Quantity

1,159

2,878 (avg. 2.5)

745 (64.3%)

6 (0.5%)

Robot Simulator

2,995

12,045 (avg. 4.0)

2,465 (82.3%)

44 (1.5%)

Robot Name

1,425

5,900 (avg. 4.1)

973 (68.3%)

35 (2.5%)

Protein Translation

1,400

5,462 (avg. 3.9)

958 (68.4%)

15 (1.1%)

OCR Numbers

1,049

3,304 (avg. 3.1)

610 (58.2%)

13 (1.2%)

React

1,572

5,658 (avg. 3.6)

526 (33.5%)

26 (1.7%)

Wordy

1,008

3,049 (avg. 3.0)

680 (67.5%)

7 (0.7%)

Custom Set

1,280

4,614 (avg. 3.6)

846 (66.1%)

15 (1.2%)

Circular Buffer

1,593

5,882 (avg. 3.7)

981 (61.6%)

41 (2.6%)

Rectangles

1,113

4,331 (avg. 3.9)

579 (52.0%)

13 (1.2%)

Collatz Conjecture

3,344

12,792 (avg. 3.8)

2,755 (82.4%)

58 (1.7%)

Diffie-Hellman

3,000

11,408 (avg. 3.8)

2,025 (67.5%)

46 (1.5%)

Series

3,167

10,448 (avg. 3.3)

2,603 (82.2%)

49 (1.5%)

Accumulate

1,249

4,212 (avg. 3.4)

929 (74.4%)

29 (2.3%)

Affine Cipher

780

3,423 (avg. 4.4)

503 (64.5%)

6 (0.8%)

Atbash Cipher

2,168

5,976 (avg. 2.8)

1,652 (76.2%)

799 (36.9%)

Crypto Square

1,024

2,560 (avg. 2.5)

673 (65.7%)

5 (0.5%)

Diamond

843

2,407 (avg. 2.9)

565 (67.0%)

1 (0.1%)

Largest Series Product

1,269

3,371 (avg. 2.7)

991 (78.1%)

18 (1.4%)

Luhn From

1,214

2,645 (avg. 2.2)

883 (72.7%)

9 (0.7%)

Luhn Trait

1,045

1,418 (avg. 1.4)

770 (73.7%)

4 (0.4%)

Phone Number

1,125

3,219 (avg. 2.9)

841 (74.8%)

20 (1.8%)

Rail Fence Cipher

776

2,513 (avg. 3.2)

467 (60.2%)

4 (0.5%)

Roman Numerals

1,355

3,486 (avg. 2.6)

1,015 (74.9%)

9 (0.7%)

Rotational Cipher

1,121

2,270 (avg. 2.0)

855 (76.3%)

13 (1.2%)

Simple Cipher

915

3,194 (avg. 3.5)

575 (62.8%)

5 (0.5%)

Word Count

1,899

6,134 (avg. 3.2)

1,533 (80.7%)

44 (2.3%)

Fizzy

1,029

5,448 (avg. 5.3)

515 (50.0%)

11 (1.1%)

Pythagorean Triplet

3,868

6,920 (avg. 1.8)

2,087 (54.0%)

1,316 (34.0%)

Xorcism

872

4,411 (avg. 5.1)

318 (36.5%)

26 (3.0%)

Book Store

704

1,811 (avg. 2.6)

318 (45.2%)

6 (0.9%)

Decimal

864

3,804 (avg. 4.4)

367 (42.5%)

6 (0.7%)

Grep

856

3,700 (avg. 4.3)

421 (49.2%)

8 (0.9%)

Dominoes

835

2,698 (avg. 3.2)

409 (49.0%)

16 (1.9%)

Doubly Linked List

886

2,820 (avg. 3.2)

253 (28.6%)

20 (2.3%)

Secret Handshake

504

1,668 (avg. 3.3)

393 (78.0%)

13 (2.6%)

Knapsack

336

1,656 (avg. 4.9)

206 (61.3%)

4 (1.2%)

Kindergarten Garden

1,045

6,199 (avg. 5.9)

725 (69.4%)

24 (2.3%)

Yacht

390

3,266 (avg. 8.4)

268 (68.7%)

6 (1.5%)

Matrix

286 (avg. 5.6)

35 (68.6%)

0 (0.0%)

Eliuds Eggs

129

300 (avg. 2.3)

98 (76.0%)

1 (0.8%)

4 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

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

4,433 (avg. 3.9)

498 (44.0%)

8 (0.7%)

Two Fer

28 (avg. 1.2)

4 (17.4%)

1 (4.3%)

40 unimplemented practice exercises

Bank Account

Binary Search Tree

Bottle Song

Change

Complex Numbers

Connect

Conway's Game of Life

D&D Character

Darts

Error Handling

Flatten Array

Food Chain

Go Counting

Hangman

House

Killer Sudoku Helper

Ledger

Lens Person

Linked List

List Ops

Markdown

Meetup

Micro Blog

POV

Rational Numbers

Resistor Color

Resistor Color Duo

Resistor Color Trio

REST API

Satellite

SGF Parsing

Square Root

State of Tic-Tac-Toe

Strain

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: 69778b910df4903451e27471f5044e4778f4abfc (Takes up to 10 mins to deploy)

Total Test Runner Runs

2,192,557

Test Run Pass Rate

24.8% (544688)

Test Run Fail Rate

22.5% (493970)

Test Run Error Rate

52.6% (1153899)

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: cbc795f4ffc009e31dd7c7a39aa88bddfb79ac29 (Takes up to 10 mins to deploy)

Total Representer Runs

839,892

Total Representation Comments Made

Feedback Given Frequency

0.0%

Analyzer

Learn More

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

Current version: f88f84fed88281e86d70f7281acc956d53e16eeb (Takes up to 10 mins to deploy)

Total Analyzer Runs

551,881

Total Analysis Comments Made

113,949

Feedback Given Frequency

2.3%

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