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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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Submissions

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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: 97db9c0bc9d0bbe0fd4890476cd24e11e222ac3a (Updates should be instant)

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

98 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

93,483

165,220 (avg. 1.8)

80,536 (86.2%)

28 (0.0%)

Reverse String

44,188

150,979 (avg. 3.4)

29,463 (66.7%)

4,713 (10.7%)

Gigasecond

30,672

88,114 (avg. 2.9)

23,800 (77.6%)

4,071 (13.3%)

Clock

19,120

165,275 (avg. 8.6)

13,307 (69.6%)

2,971 (15.5%)

Anagram

12,055

82,717 (avg. 6.9)

8,850 (73.4%)

2,036 (16.9%)

Space Age

8,477

32,576 (avg. 3.8)

6,829 (80.6%)

1,211 (14.3%)

Sublist

14,598

85,009 (avg. 5.8)

9,365 (64.2%)

1,281 (8.8%)

Minesweeper

6,863

48,427 (avg. 7.1)

4,596 (67.0%)

776 (11.3%)

Luhn

6,454

42,369 (avg. 6.6)

5,339 (82.7%)

643 (10.0%)

Armstrong Numbers

11,837

58,837 (avg. 5.0)

9,728 (82.2%)

318 (2.7%)

Beer Song

13,728

74,998 (avg. 5.5)

10,760 (78.4%)

245 (1.8%)

Difference of Squares

11,846

25,764 (avg. 2.2)

10,718 (90.5%)

242 (2.0%)

Grains

10,370

34,973 (avg. 3.4)

9,154 (88.3%)

144 (1.4%)

Leap

20,312

30,785 (avg. 1.5)

17,613 (86.7%)

482 (2.4%)

Nth Prime

13,698

39,048 (avg. 2.9)

10,027 (73.2%)

384 (2.8%)

Prime Factors

7,842

22,535 (avg. 2.9)

6,448 (82.2%)

93 (1.2%)

Proverb

9,088

23,212 (avg. 2.6)

7,713 (84.9%)

144 (1.6%)

Raindrops

16,376

28,492 (avg. 1.7)

14,186 (86.6%)

418 (2.6%)

Sum of Multiples

9,235

27,658 (avg. 3.0)

7,761 (84.0%)

153 (1.7%)

Bob

9,717

38,118 (avg. 3.9)

7,867 (81.0%)

864 (8.9%)

High Scores

6,627

37,159 (avg. 5.6)

5,199 (78.5%)

127 (1.9%)

Matching Brackets

7,193

25,880 (avg. 3.6)

5,833 (81.1%)

273 (3.8%)

Collatz Conjecture

4,129

15,306 (avg. 3.7)

3,461 (83.8%)

69 (1.7%)

Diffie-Hellman

3,777

15,658 (avg. 4.1)

2,572 (68.1%)

56 (1.5%)

Series

3,839

12,975 (avg. 3.4)

3,174 (82.7%)

52 (1.4%)

Kindergarten Garden

1,704

10,162 (avg. 6.0)

1,243 (72.9%)

40 (2.3%)

Eliud's Eggs

915

2,474 (avg. 2.7)

784 (85.7%)

10 (1.1%)

Acronym

4,548

23,390 (avg. 5.1)

3,458 (76.0%)

58 (1.3%)

All Your Base

3,055

12,973 (avg. 4.2)

2,345 (76.8%)

46 (1.5%)

Allergies

5,008

28,435 (avg. 5.7)

3,827 (76.4%)

123 (2.5%)

Alphametics

2,571

12,358 (avg. 4.8)

1,042 (40.5%)

57 (2.2%)

Binary Search

3,723

13,980 (avg. 3.8)

2,902 (77.9%)

44 (1.2%)

Bowling

2,921

17,936 (avg. 6.1)

1,596 (54.6%)

40 (1.4%)

DOT DSL

3,745

13,397 (avg. 3.6)

2,222 (59.3%)

59 (1.6%)

ETL

3,356

6,567 (avg. 2.0)

2,781 (82.9%)

31 (0.9%)

Grade School

2,999

10,517 (avg. 3.5)

2,469 (82.3%)

33 (1.1%)

Hamming

3,505

6,256 (avg. 1.8)

3,079 (87.8%)

59 (1.7%)

ISBN Verifier

2,674

10,206 (avg. 3.8)

2,126 (79.5%)

27 (1.0%)

Isogram

3,137

7,656 (avg. 2.4)

2,630 (83.8%)

31 (1.0%)

Nucleotide Count

3,727

10,571 (avg. 2.8)

3,153 (84.6%)

44 (1.2%)

PaaS I/O

3,020

4,504 (avg. 1.5)

1,819 (60.2%)

16 (0.5%)

Palindrome Products

1,717

7,304 (avg. 4.3)

1,142 (66.5%)

22 (1.3%)

Pangram

2,853

6,541 (avg. 2.3)

2,469 (86.5%)

44 (1.5%)

Pascal's Triangle

3,371

7,720 (avg. 2.3)

2,752 (81.6%)

32 (0.9%)

Perfect Numbers

2,054

4,879 (avg. 2.4)

1,700 (82.8%)

37 (1.8%)

Pig Latin

1,334

4,170 (avg. 3.1)

833 (62.4%)

12 (0.9%)

Queen Attack

2,565

5,598 (avg. 2.2)

2,141 (83.5%)

16 (0.6%)

RNA Transcription

3,239

8,500 (avg. 2.6)

2,675 (82.6%)

39 (1.2%)

Run-Length Encoding

2,578

8,467 (avg. 3.3)

1,996 (77.4%)

34 (1.3%)

Saddle Points

3,127

6,243 (avg. 2.0)

2,133 (68.2%)

308 (9.8%)

Say

2,013

5,316 (avg. 2.6)

1,321 (65.6%)

14 (0.7%)

Scrabble Score

2,528

4,983 (avg. 2.0)

2,146 (84.9%)

27 (1.1%)

Sieve

2,683

6,331 (avg. 2.4)

2,214 (82.5%)

31 (1.2%)

Simple Linked List

4,210

24,693 (avg. 5.9)

2,690 (63.9%)

124 (2.9%)

Spiral Matrix

1,430

3,914 (avg. 2.7)

951 (66.5%)

11 (0.8%)

Tournament

2,754

17,996 (avg. 6.5)

1,979 (71.9%)

66 (2.4%)

Triangle

2,481

6,081 (avg. 2.5)

2,036 (82.1%)

27 (1.1%)

Two Bucket

1,326

2,496 (avg. 1.9)

687 (51.8%)

13 (1.0%)

Variable Length Quantity

1,313

3,911 (avg. 3.0)

841 (64.1%)

6 (0.5%)

Robot Simulator

3,193

12,691 (avg. 4.0)

2,612 (81.8%)

46 (1.4%)

Robot Name

1,595

6,680 (avg. 4.2)

1,079 (67.6%)

39 (2.4%)

Protein Translation

1,579

6,610 (avg. 4.2)

1,090 (69.0%)

17 (1.1%)

Wordy

1,148

3,434 (avg. 3.0)

767 (66.8%)

7 (0.6%)

Custom Set

1,443

5,377 (avg. 3.7)

946 (65.6%)

16 (1.1%)

Accumulate

1,431

4,860 (avg. 3.4)

1,060 (74.1%)

31 (2.2%)

Affine Cipher

909

4,066 (avg. 4.5)

588 (64.7%)

6 (0.7%)

Atbash Cipher

2,312

6,300 (avg. 2.7)

1,753 (75.8%)

800 (34.6%)

Crypto Square

1,147

3,183 (avg. 2.8)

754 (65.7%)

6 (0.5%)

Diamond

979

2,833 (avg. 2.9)

662 (67.6%)

1 (0.1%)

Largest Series Product

1,410

3,783 (avg. 2.7)

1,092 (77.4%)

19 (1.3%)

Luhn From

1,372

2,984 (avg. 2.2)

991 (72.2%)

10 (0.7%)

Luhn Trait

1,198

1,608 (avg. 1.3)

873 (72.9%)

4 (0.3%)

Phone Number

1,284

3,921 (avg. 3.1)

953 (74.2%)

20 (1.6%)

Rail Fence Cipher

913

3,102 (avg. 3.4)

544 (59.6%)

5 (0.5%)

Roman Numerals

1,526

4,166 (avg. 2.7)

1,122 (73.5%)

13 (0.9%)

Rotational Cipher

1,268

2,607 (avg. 2.1)

961 (75.8%)

14 (1.1%)

Simple Cipher

1,045

3,628 (avg. 3.5)

656 (62.8%)

7 (0.7%)

Word Count

2,065

7,009 (avg. 3.4)

1,651 (80.0%)

46 (2.2%)

Secret Handshake

652

1,997 (avg. 3.1)

497 (76.2%)

14 (2.1%)

Knapsack

483

2,113 (avg. 4.4)

297 (61.5%)

4 (0.8%)

Yacht

608

4,978 (avg. 8.2)

436 (71.7%)

10 (1.6%)

Matrix

237

928 (avg. 3.9)

173 (73.0%)

1 (0.4%)

Fizzy

1,221

6,981 (avg. 5.7)

613 (50.2%)

17 (1.4%)

Pythagorean Triplet

4,003

7,360 (avg. 1.8)

2,180 (54.5%)

1,318 (32.9%)

Parallel Letter Frequency

4,232

23,558 (avg. 5.6)

2,605 (61.6%)

533 (12.6%)

Macros

3,178

16,283 (avg. 5.1)

2,367 (74.5%)

323 (10.2%)

Poker

4,304

26,668 (avg. 6.2)

1,408 (32.7%)

271 (6.3%)

Forth

2,107

16,112 (avg. 7.6)

1,015 (48.2%)

179 (8.5%)

OCR Numbers

1,158

3,840 (avg. 3.3)

672 (58.0%)

14 (1.2%)

React

1,755

6,360 (avg. 3.6)

593 (33.8%)

29 (1.7%)

Circular Buffer

1,796

7,088 (avg. 3.9)

1,105 (61.5%)

48 (2.7%)

Rectangles

1,207

4,725 (avg. 3.9)

627 (51.9%)

15 (1.2%)

Xorcism

1,024

5,086 (avg. 5.0)

386 (37.7%)

29 (2.8%)

Book Store

816

2,138 (avg. 2.6)

362 (44.4%)

6 (0.7%)

Decimal

1,010

4,553 (avg. 4.5)

414 (41.0%)

7 (0.7%)

Grep

985

4,324 (avg. 4.4)

479 (48.6%)

9 (0.9%)

Dominoes

956

3,434 (avg. 3.6)

463 (48.4%)

19 (2.0%)

Doubly Linked List

1,070

3,854 (avg. 3.6)

310 (29.0%)

24 (2.2%)

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

4,435 (avg. 3.9)

499 (44.1%)

9 (0.8%)

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: 86a0b4889dfccd886c6afc9cca33876e0238fff8 (Takes up to 10 mins to deploy)

Total Test Runner Runs

2,519,078

Test Run Pass Rate

24.7% (622740)

Test Run Fail Rate

22.8% (574346)

Test Run Error Rate

52.5% (1321992)

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: d07d1b85e11a0364b8151f26161b1fa542f4e34b (Takes up to 10 mins to deploy)

Total Representer Runs

912,395

Total Representation Comments Made

55,975

Feedback Given Frequency

6.1%

Analyzer

Learn More

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

Current version: 9e00d23310f74d47f014b00e72da22541852af87 (Takes up to 10 mins to deploy)

Total Analyzer Runs

623,933

Total Analysis Comments Made

146,489

Feedback Given Frequency

2.6%

Volunteers

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6,590

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