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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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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: 1d3a0f463c0f411dcb5ccbe45e72354da8db58dc (Updates should be instant)

Next goal: Implement 145 practice exercises. Find out more.

99 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

122,557

220,155 (avg. 1.8)

101,500 (82.8%)

28 (0.0%)

Reverse String

61,401

217,728 (avg. 3.5)

39,733 (64.7%)

5,088 (8.3%)

Gigasecond

41,116

123,548 (avg. 3.0)

31,090 (75.6%)

4,198 (10.2%)

Clock

25,256

228,180 (avg. 9.0)

17,448 (69.1%)

3,135 (12.4%)

Anagram

16,471

114,121 (avg. 6.9)

12,113 (73.5%)

2,187 (13.3%)

Space Age

11,698

45,981 (avg. 3.9)

9,431 (80.6%)

1,275 (10.9%)

Sublist

17,404

99,742 (avg. 5.7)

11,739 (67.5%)

1,333 (7.7%)

Flower Field

2,035

14,654 (avg. 7.2)

1,436 (70.6%)

45 (2.2%)

Luhn

8,692

60,184 (avg. 6.9)

7,235 (83.2%)

691 (7.9%)

Armstrong Numbers

15,677

78,298 (avg. 5.0)

13,020 (83.1%)

422 (2.7%)

Bottle Song

3,036

23,498 (avg. 7.7)

2,148 (70.8%)

49 (1.6%)

Difference of Squares

14,641

34,191 (avg. 2.3)

13,236 (90.4%)

268 (1.8%)

Grains

12,955

46,987 (avg. 3.6)

11,497 (88.7%)

157 (1.2%)

Leap

22,829

38,130 (avg. 1.7)

19,945 (87.4%)

496 (2.2%)

Nth Prime

15,917

51,063 (avg. 3.2)

11,861 (74.5%)

420 (2.6%)

Prime Factors

9,803

31,458 (avg. 3.2)

8,118 (82.8%)

119 (1.2%)

Proverb

10,770

30,847 (avg. 2.9)

9,236 (85.8%)

154 (1.4%)

Raindrops

18,372

34,918 (avg. 1.9)

16,020 (87.2%)

437 (2.4%)

Sum of Multiples

11,062

36,760 (avg. 3.3)

9,339 (84.4%)

169 (1.5%)

Bob

11,471

49,592 (avg. 4.3)

9,396 (81.9%)

878 (7.7%)

High Scores

8,507

50,444 (avg. 5.9)

6,751 (79.4%)

150 (1.8%)

Matching Brackets

8,932

34,838 (avg. 3.9)

7,329 (82.1%)

286 (3.2%)

Collatz Conjecture

5,867

21,378 (avg. 3.6)

5,047 (86.0%)

83 (1.4%)

Series

5,408

19,444 (avg. 3.6)

4,577 (84.6%)

60 (1.1%)

Kindergarten Garden

3,169

19,582 (avg. 6.2)

2,466 (77.8%)

53 (1.7%)

Eliud's Eggs

2,430

6,538 (avg. 2.7)

2,158 (88.8%)

18 (0.7%)

Acronym

6,048

34,476 (avg. 5.7)

4,632 (76.6%)

74 (1.2%)

All Your Base

4,244

19,126 (avg. 4.5)

3,337 (78.6%)

54 (1.3%)

Allergies

6,139

33,991 (avg. 5.5)

4,801 (78.2%)

138 (2.2%)

Alphametics

3,556

19,318 (avg. 5.4)

1,555 (43.7%)

67 (1.9%)

Binary Search

4,917

20,256 (avg. 4.1)

3,921 (79.7%)

54 (1.1%)

Bowling

3,803

26,320 (avg. 6.9)

2,115 (55.6%)

55 (1.4%)

DOT DSL

4,480

19,018 (avg. 4.2)

2,701 (60.3%)

71 (1.6%)

ETL

4,432

9,892 (avg. 2.2)

3,684 (83.1%)

36 (0.8%)

Grade School

3,765

14,893 (avg. 4.0)

3,091 (82.1%)

35 (0.9%)

Hamming

4,353

8,319 (avg. 1.9)

3,818 (87.7%)

67 (1.5%)

ISBN Verifier

3,453

14,978 (avg. 4.3)

2,787 (80.7%)

39 (1.1%)

Isogram

3,912

10,178 (avg. 2.6)

3,305 (84.5%)

33 (0.8%)

Nucleotide Count

4,491

13,813 (avg. 3.1)

3,809 (84.8%)

51 (1.1%)

PaaS I/O

3,796

6,637 (avg. 1.7)

2,364 (62.3%)

19 (0.5%)

Palindrome Products

2,326

10,970 (avg. 4.7)

1,604 (69.0%)

26 (1.1%)

Pangram

3,558

8,622 (avg. 2.4)

3,087 (86.8%)

48 (1.3%)

Pascal's Triangle

3,987

10,490 (avg. 2.6)

3,266 (81.9%)

37 (0.9%)

Perfect Numbers

2,654

7,006 (avg. 2.6)

2,222 (83.7%)

42 (1.6%)

Pig Latin

1,865

7,457 (avg. 4.0)

1,242 (66.6%)

17 (0.9%)

Queen Attack

3,150

7,216 (avg. 2.3)

2,627 (83.4%)

17 (0.5%)

RNA Transcription

3,876

10,844 (avg. 2.8)

3,215 (82.9%)

41 (1.1%)

Run-Length Encoding

3,186

11,944 (avg. 3.7)

2,485 (78.0%)

36 (1.1%)

Saddle Points

3,635

8,598 (avg. 2.4)

2,543 (70.0%)

309 (8.5%)

Say

2,485

7,972 (avg. 3.2)

1,681 (67.6%)

15 (0.6%)

Scrabble Score

3,107

6,737 (avg. 2.2)

2,641 (85.0%)

29 (0.9%)

Sieve

3,205

8,369 (avg. 2.6)

2,646 (82.6%)

33 (1.0%)

Simple Linked List

5,146

32,263 (avg. 6.3)

3,261 (63.4%)

137 (2.7%)

Spiral Matrix

1,874

5,836 (avg. 3.1)

1,306 (69.7%)

12 (0.6%)

Tournament

3,213

20,881 (avg. 6.5)

2,322 (72.3%)

66 (2.1%)

Triangle

3,056

8,084 (avg. 2.6)

2,503 (81.9%)

34 (1.1%)

Two Bucket

1,718

4,455 (avg. 2.6)

926 (53.9%)

17 (1.0%)

Variable Length Quantity

1,700

6,157 (avg. 3.6)

1,110 (65.3%)

7 (0.4%)

Robot Simulator

3,769

14,960 (avg. 4.0)

3,047 (80.8%)

47 (1.2%)

Robot Name

2,110

10,245 (avg. 4.9)

1,429 (67.7%)

45 (2.1%)

Protein Translation

2,075

9,090 (avg. 4.4)

1,485 (71.6%)

18 (0.9%)

Wordy

1,546

5,533 (avg. 3.6)

1,061 (68.6%)

8 (0.5%)

Custom Set

1,903

7,742 (avg. 4.1)

1,266 (66.5%)

18 (0.9%)

Accumulate

1,920

6,822 (avg. 3.6)

1,443 (75.2%)

33 (1.7%)

Affine Cipher

1,293

6,443 (avg. 5.0)

854 (66.0%)

7 (0.5%)

Atbash Cipher

2,696

7,940 (avg. 2.9)

2,056 (76.3%)

802 (29.7%)

Crypto Square

1,515

5,066 (avg. 3.3)

1,020 (67.3%)

7 (0.5%)

Diamond

1,349

4,438 (avg. 3.3)

946 (70.1%)

1 (0.1%)

Largest Series Product

1,797

5,343 (avg. 3.0)

1,392 (77.5%)

19 (1.1%)

Luhn From

1,817

4,226 (avg. 2.3)

1,323 (72.8%)

13 (0.7%)

Luhn Trait

1,615

2,326 (avg. 1.4)

1,190 (73.7%)

7 (0.4%)

List Ops

442

2,257 (avg. 5.1)

290 (65.6%)

4 (0.9%)

Phone Number

1,674

5,371 (avg. 3.2)

1,257 (75.1%)

21 (1.3%)

Rail Fence Cipher

1,226

4,495 (avg. 3.7)

756 (61.7%)

5 (0.4%)

Roman Numerals

1,910

5,539 (avg. 2.9)

1,414 (74.0%)

15 (0.8%)

Rotational Cipher

1,613

3,458 (avg. 2.1)

1,231 (76.3%)

14 (0.9%)

Simple Cipher

1,389

5,376 (avg. 3.9)

899 (64.7%)

9 (0.6%)

Word Count

2,522

9,517 (avg. 3.8)

1,988 (78.8%)

47 (1.9%)

Secret Handshake

997

2,791 (avg. 2.8)

765 (76.7%)

16 (1.6%)

Knapsack

838

3,499 (avg. 4.2)

548 (65.4%)

6 (0.7%)

Yacht

943

6,808 (avg. 7.2)

680 (72.1%)

11 (1.2%)

Matrix

608

2,232 (avg. 3.7)

449 (73.8%)

4 (0.7%)

Fizzy

1,660

9,619 (avg. 5.8)

872 (52.5%)

20 (1.2%)

Pythagorean Triplet

4,376

8,606 (avg. 2.0)

2,467 (56.4%)

1,320 (30.2%)

Parallel Letter Frequency

4,712

25,996 (avg. 5.5)

2,942 (62.4%)

551 (11.7%)

Macros

3,559

17,833 (avg. 5.0)

2,630 (73.9%)

327 (9.2%)

POV

241

1,241 (avg. 5.1)

111 (46.1%)

1 (0.4%)

Poker

4,619

28,635 (avg. 6.2)

1,562 (33.8%)

275 (6.0%)

Forth

2,405

17,832 (avg. 7.4)

1,174 (48.8%)

184 (7.7%)

OCR Numbers

1,419

4,726 (avg. 3.3)

838 (59.1%)

16 (1.1%)

React

2,137

7,977 (avg. 3.7)

747 (35.0%)

31 (1.5%)

Circular Buffer

2,213

8,944 (avg. 4.0)

1,381 (62.4%)

53 (2.4%)

Rectangles

1,449

6,020 (avg. 4.2)

775 (53.5%)

17 (1.2%)

Xorcism

1,331

6,843 (avg. 5.1)

568 (42.7%)

31 (2.3%)

Book Store

1,091

3,278 (avg. 3.0)

516 (47.3%)

8 (0.7%)

Decimal

1,312

6,755 (avg. 5.1)

560 (42.7%)

7 (0.5%)

Grep

1,305

5,551 (avg. 4.3)

672 (51.5%)

11 (0.8%)

Dominoes

1,270

4,564 (avg. 3.6)

636 (50.1%)

21 (1.7%)

Doubly Linked List

1,464

6,271 (avg. 4.3)

457 (31.2%)

29 (2.0%)

7 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

14,211

79,240 (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: 1140b51265e664035899844bc44fcf216e0874cd (Takes up to 10 mins to deploy)

Total Test Runner Runs

3,210,205

Test Run Pass Rate

25.4% (815778)

Test Run Fail Rate

22.8% (731204)

Test Run Error Rate

51.8% (1663223)

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: 063b1897d89cc1532870c80c4220fb6b61fb0a1a (Takes up to 10 mins to deploy)

Total Representer Runs

1,083,952

Total Representation Comments Made

81,662

Feedback Given Frequency

7.5%

Analyzer

Learn More

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

Current version: cc186eccb66765c7b4e2393d7d8aff211ec2d744 (Takes up to 10 mins to deploy)

Total Analyzer Runs

794,950

Total Analysis Comments Made

242,921

Feedback Given Frequency

3.4%

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