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

Students

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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: 1f9f9ed85e2cc785b9d8e1b493ccb606195fcb14 (Updates should be instant)

Next goal: Implement 143 practice exercises. Find out more.

98 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

103,302

184,892 (avg. 1.8)

88,002 (85.2%)

28 (0.0%)

Reverse String

50,512

177,191 (avg. 3.5)

33,292 (65.9%)

4,845 (9.6%)

Gigasecond

34,449

101,430 (avg. 2.9)

26,491 (76.9%)

4,119 (12.0%)

Clock

21,342

191,085 (avg. 9.0)

14,791 (69.3%)

3,034 (14.2%)

Anagram

13,639

95,733 (avg. 7.0)

9,990 (73.2%)

2,098 (15.4%)

Space Age

9,606

37,535 (avg. 3.9)

7,749 (80.7%)

1,236 (12.9%)

Sublist

15,588

90,549 (avg. 5.8)

10,213 (65.5%)

1,297 (8.3%)

Minesweeper

7,771

55,731 (avg. 7.2)

5,232 (67.3%)

803 (10.3%)

Luhn

7,267

49,014 (avg. 6.7)

6,024 (82.9%)

655 (9.0%)

Armstrong Numbers

13,288

66,455 (avg. 5.0)

10,975 (82.6%)

360 (2.7%)

Bottle Song

993

7,441 (avg. 7.5)

699 (70.4%)

17 (1.7%)

Difference of Squares

12,911

28,960 (avg. 2.2)

11,676 (90.4%)

252 (2.0%)

Grains

11,371

39,652 (avg. 3.5)

10,053 (88.4%)

147 (1.3%)

Leap

21,255

33,499 (avg. 1.6)

18,492 (87.0%)

486 (2.3%)

Nth Prime

14,539

43,640 (avg. 3.0)

10,711 (73.7%)

395 (2.7%)

Prime Factors

8,551

25,679 (avg. 3.0)

7,055 (82.5%)

97 (1.1%)

Proverb

9,724

26,221 (avg. 2.7)

8,291 (85.3%)

147 (1.5%)

Raindrops

17,125

30,823 (avg. 1.8)

14,883 (86.9%)

426 (2.5%)

Sum of Multiples

9,914

30,984 (avg. 3.1)

8,341 (84.1%)

160 (1.6%)

Bob

10,359

42,385 (avg. 4.1)

8,437 (81.4%)

868 (8.4%)

High Scores

7,338

42,821 (avg. 5.8)

5,783 (78.8%)

139 (1.9%)

Matching Brackets

7,840

29,369 (avg. 3.7)

6,390 (81.5%)

276 (3.5%)

Collatz Conjecture

4,794

17,626 (avg. 3.7)

4,069 (84.9%)

72 (1.5%)

Series

4,425

15,342 (avg. 3.5)

3,692 (83.4%)

54 (1.2%)

Kindergarten Garden

2,246

13,412 (avg. 6.0)

1,693 (75.4%)

43 (1.9%)

Eliud's Eggs

1,490

3,898 (avg. 2.6)

1,307 (87.7%)

11 (0.7%)

Acronym

5,126

27,657 (avg. 5.4)

3,889 (75.9%)

63 (1.2%)

All Your Base

3,475

14,990 (avg. 4.3)

2,684 (77.2%)

47 (1.4%)

Allergies

5,402

30,605 (avg. 5.7)

4,161 (77.0%)

124 (2.3%)

Alphametics

2,902

15,180 (avg. 5.2)

1,208 (41.6%)

59 (2.0%)

Binary Search

4,147

16,290 (avg. 3.9)

3,256 (78.5%)

46 (1.1%)

Bowling

3,219

20,694 (avg. 6.4)

1,767 (54.9%)

44 (1.4%)

DOT DSL

4,007

15,799 (avg. 3.9)

2,389 (59.6%)

64 (1.6%)

ETL

3,690

7,577 (avg. 2.1)

3,060 (82.9%)

32 (0.9%)

Grade School

3,256

11,903 (avg. 3.7)

2,680 (82.3%)

34 (1.0%)

Hamming

3,790

6,930 (avg. 1.8)

3,316 (87.5%)

62 (1.6%)

ISBN Verifier

2,949

11,811 (avg. 4.0)

2,359 (80.0%)

29 (1.0%)

Isogram

3,413

8,652 (avg. 2.5)

2,869 (84.1%)

31 (0.9%)

Nucleotide Count

3,999

11,668 (avg. 2.9)

3,381 (84.5%)

46 (1.2%)

PaaS I/O

3,304

5,430 (avg. 1.6)

2,005 (60.7%)

18 (0.5%)

Palindrome Products

1,935

8,708 (avg. 4.5)

1,301 (67.2%)

24 (1.2%)

Pangram

3,107

7,270 (avg. 2.3)

2,681 (86.3%)

44 (1.4%)

Pascal's Triangle

3,591

8,637 (avg. 2.4)

2,932 (81.6%)

35 (1.0%)

Perfect Numbers

2,257

5,598 (avg. 2.5)

1,872 (82.9%)

38 (1.7%)

Pig Latin

1,520

5,396 (avg. 3.6)

968 (63.7%)

14 (0.9%)

Queen Attack

2,767

6,212 (avg. 2.2)

2,305 (83.3%)

16 (0.6%)

RNA Transcription

3,458

9,216 (avg. 2.7)

2,859 (82.7%)

39 (1.1%)

Run-Length Encoding

2,794

9,697 (avg. 3.5)

2,163 (77.4%)

34 (1.2%)

Saddle Points

3,305

7,004 (avg. 2.1)

2,277 (68.9%)

309 (9.3%)

Say

2,182

6,423 (avg. 2.9)

1,444 (66.2%)

15 (0.7%)

Scrabble Score

2,730

5,497 (avg. 2.0)

2,310 (84.6%)

27 (1.0%)

Sieve

2,861

6,934 (avg. 2.4)

2,354 (82.3%)

32 (1.1%)

Simple Linked List

4,555

27,720 (avg. 6.1)

2,882 (63.3%)

130 (2.9%)

Spiral Matrix

1,574

4,533 (avg. 2.9)

1,059 (67.3%)

12 (0.8%)

Tournament

2,916

19,076 (avg. 6.5)

2,098 (71.9%)

66 (2.3%)

Triangle

2,670

6,701 (avg. 2.5)

2,183 (81.8%)

30 (1.1%)

Two Bucket

1,454

3,087 (avg. 2.1)

766 (52.7%)

15 (1.0%)

Variable Length Quantity

1,446

4,779 (avg. 3.3)

932 (64.5%)

6 (0.4%)

Robot Simulator

3,394

13,496 (avg. 4.0)

2,760 (81.3%)

47 (1.4%)

Robot Name

1,776

7,904 (avg. 4.5)

1,207 (68.0%)

40 (2.3%)

Protein Translation

1,742

7,280 (avg. 4.2)

1,221 (70.1%)

18 (1.0%)

Wordy

1,289

4,414 (avg. 3.4)

868 (67.3%)

8 (0.6%)

Custom Set

1,606

6,194 (avg. 3.9)

1,063 (66.2%)

16 (1.0%)

Accumulate

1,604

5,671 (avg. 3.5)

1,192 (74.3%)

33 (2.1%)

Affine Cipher

1,050

4,949 (avg. 4.7)

686 (65.3%)

6 (0.6%)

Atbash Cipher

2,457

6,766 (avg. 2.8)

1,864 (75.9%)

801 (32.6%)

Crypto Square

1,284

3,708 (avg. 2.9)

850 (66.2%)

6 (0.5%)

Diamond

1,109

3,300 (avg. 3.0)

758 (68.3%)

1 (0.1%)

Largest Series Product

1,550

4,305 (avg. 2.8)

1,199 (77.4%)

19 (1.2%)

Luhn From

1,541

3,403 (avg. 2.2)

1,112 (72.2%)

10 (0.6%)

Luhn Trait

1,355

1,860 (avg. 1.4)

988 (72.9%)

5 (0.4%)

List Ops

172

845 (avg. 4.9)

118 (68.6%)

3 (1.7%)

Phone Number

1,410

4,362 (avg. 3.1)

1,049 (74.4%)

20 (1.4%)

Rail Fence Cipher

1,034

3,521 (avg. 3.4)

621 (60.1%)

5 (0.5%)

Roman Numerals

1,654

4,537 (avg. 2.7)

1,212 (73.3%)

14 (0.8%)

Rotational Cipher

1,389

2,830 (avg. 2.0)

1,051 (75.7%)

14 (1.0%)

Simple Cipher

1,159

4,093 (avg. 3.5)

731 (63.1%)

9 (0.8%)

Word Count

2,226

7,640 (avg. 3.4)

1,764 (79.2%)

46 (2.1%)

Secret Handshake

773

2,237 (avg. 2.9)

586 (75.8%)

15 (1.9%)

Knapsack

615

2,630 (avg. 4.3)

390 (63.4%)

5 (0.8%)

Yacht

736

5,629 (avg. 7.6)

529 (71.9%)

11 (1.5%)

Matrix

379

1,284 (avg. 3.4)

271 (71.5%)

1 (0.3%)

Fizzy

1,383

8,153 (avg. 5.9)

708 (51.2%)

18 (1.3%)

Pythagorean Triplet

4,128

7,706 (avg. 1.9)

2,273 (55.1%)

1,319 (32.0%)

Parallel Letter Frequency

4,404

24,342 (avg. 5.5)

2,732 (62.0%)

544 (12.4%)

Macros

3,314

16,824 (avg. 5.1)

2,460 (74.2%)

324 (9.8%)

Poker

4,426

27,768 (avg. 6.3)

1,469 (33.2%)

273 (6.2%)

Forth

2,230

16,754 (avg. 7.5)

1,079 (48.4%)

181 (8.1%)

OCR Numbers

1,259

4,126 (avg. 3.3)

739 (58.7%)

14 (1.1%)

React

1,909

7,085 (avg. 3.7)

657 (34.4%)

31 (1.6%)

Circular Buffer

1,952

7,932 (avg. 4.1)

1,221 (62.6%)

50 (2.6%)

Rectangles

1,303

5,070 (avg. 3.9)

680 (52.2%)

16 (1.2%)

Xorcism

1,139

5,851 (avg. 5.1)

451 (39.6%)

29 (2.5%)

Book Store

924

2,558 (avg. 2.8)

420 (45.5%)

7 (0.8%)

Decimal

1,119

5,356 (avg. 4.8)

466 (41.6%)

7 (0.6%)

Grep

1,111

4,647 (avg. 4.2)

552 (49.7%)

9 (0.8%)

Dominoes

1,075

3,874 (avg. 3.6)

526 (48.9%)

20 (1.9%)

Doubly Linked List

1,237

5,251 (avg. 4.2)

368 (29.7%)

27 (2.2%)

6 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

14,211

78,989 (avg. 5.6)

11,155 (78.5%)

255 (1.8%)

Diffie-Hellman

4,014

16,899 (avg. 4.2)

2,768 (69.0%)

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

4,444 (avg. 3.9)

499 (44.1%)

9 (0.8%)

Two Fer

28 (avg. 1.2)

4 (17.4%)

1 (4.3%)

45 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

Flower Field

Food Chain

Go Counting

Hangman

House

Intergalactic Transmission

Killer Sudoku Helper

Ledger

Lens Person

Linked List

Markdown

Meetup

Micro Blog

Piecing It Together

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: 7fa8d49ddcaa3a4b09680de2af6468a26b156b13 (Takes up to 10 mins to deploy)

Total Test Runner Runs

2,779,396

Test Run Pass Rate

24.9% (692338)

Test Run Fail Rate

22.8% (632696)

Test Run Error Rate

52.3% (1454362)

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: 473cc904099a7249dabcbcbf28e901c8ada49fde (Takes up to 10 mins to deploy)

Total Representer Runs

976,154

Total Representation Comments Made

65,140

Feedback Given Frequency

6.7%

Analyzer

Learn More

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

Current version: 01597c8b2988efcacbf038a5bf0b09ec77e3a2b1 (Takes up to 10 mins to deploy)

Total Analyzer Runs

687,378

Total Analysis Comments Made

180,326

Feedback Given Frequency

2.9%

Volunteers

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