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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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Mentoring Discussions
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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: 289164d1880be83a413ec8344e8d3b6296e1bd92 (Updates should be instant)

Next goal: Implement 138 practice exercises. Find out more.
98 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
86,917
152,910 (avg. 1.8)
75,702 (87.1%)
28 (0.0%)
Reverse String Reverse String
40,035
133,745 (avg. 3.3)
26,982 (67.4%)
4,605 (11.5%)
Gigasecond Gigasecond
28,265
79,678 (avg. 2.8)
22,111 (78.2%)
4,031 (14.3%)
Clock Clock
17,682
149,752 (avg. 8.5)
12,360 (69.9%)
2,924 (16.5%)
Anagram Anagram
11,037
75,726 (avg. 6.9)
8,122 (73.6%)
1,991 (18.0%)
Space Age Space Age
7,767
29,553 (avg. 3.8)
6,252 (80.5%)
1,196 (15.4%)
Sublist Sublist
13,987
81,574 (avg. 5.8)
8,871 (63.4%)
1,266 (9.1%)
Minesweeper Minesweeper
6,323
44,151 (avg. 7.0)
4,214 (66.6%)
760 (12.0%)
Luhn Luhn
5,959
38,320 (avg. 6.4)
4,926 (82.7%)
631 (10.6%)
Armstrong Numbers Armstrong Numbers
10,923
53,977 (avg. 4.9)
8,950 (81.9%)
293 (2.7%)
Beer Song Beer Song
12,991
67,381 (avg. 5.2)
10,189 (78.4%)
230 (1.8%)
Difference of Squares Difference of Squares
11,192
23,658 (avg. 2.1)
10,131 (90.5%)
230 (2.1%)
Grains Grains
9,755
31,897 (avg. 3.3)
8,605 (88.2%)
140 (1.4%)
Leap Leap
19,751
29,029 (avg. 1.5)
17,106 (86.6%)
478 (2.4%)
Nth Prime Nth Prime
13,175
35,967 (avg. 2.7)
9,617 (73.0%)
377 (2.9%)
Prime Factors Prime Factors
7,403
20,209 (avg. 2.7)
6,086 (82.2%)
86 (1.2%)
Proverb Proverb
8,694
21,570 (avg. 2.5)
7,371 (84.8%)
137 (1.6%)
Raindrops Raindrops
15,915
27,046 (avg. 1.7)
13,767 (86.5%)
413 (2.6%)
Sum of Multiples Sum of Multiples
8,846
25,554 (avg. 2.9)
7,430 (84.0%)
147 (1.7%)
Bob Bob
9,316
34,907 (avg. 3.7)
7,532 (80.9%)
857 (9.2%)
High Scores High Scores
6,198
34,217 (avg. 5.5)
4,859 (78.4%)
121 (2.0%)
Matching Brackets Matching Brackets
6,806
23,899 (avg. 3.5)
5,503 (80.9%)
266 (3.9%)
Collatz Conjecture Collatz Conjecture
3,712
14,009 (avg. 3.8)
3,087 (83.2%)
62 (1.7%)
Diffie-Hellman Diffie-Hellman
3,363
13,628 (avg. 4.1)
2,287 (68.0%)
51 (1.5%)
Series Series
3,465
11,712 (avg. 3.4)
2,864 (82.7%)
52 (1.5%)
Kindergarten Garden Kindergarten Garden
1,351
8,225 (avg. 6.1)
970 (71.8%)
29 (2.1%)
Eliuds Eggs Eliuds Eggs
531
1,605 (avg. 3.0)
457 (86.1%)
5 (0.9%)
Acronym Acronym
4,223
21,364 (avg. 5.1)
3,214 (76.1%)
52 (1.2%)
All Your Base All Your Base
2,780
11,582 (avg. 4.2)
2,141 (77.0%)
44 (1.6%)
Allergies Allergies
4,749
27,095 (avg. 5.7)
3,621 (76.2%)
121 (2.5%)
Alphametics Alphametics
2,367
11,164 (avg. 4.7)
960 (40.6%)
51 (2.2%)
Binary Search Binary Search
3,438
12,568 (avg. 3.7)
2,681 (78.0%)
43 (1.3%)
Bowling Bowling
2,737
16,429 (avg. 6.0)
1,513 (55.3%)
36 (1.3%)
DOT DSL DOT DSL
3,596
12,663 (avg. 3.5)
2,132 (59.3%)
57 (1.6%)
ETL ETL
3,200
6,258 (avg. 2.0)
2,662 (83.2%)
31 (1.0%)
Grade School Grade School
2,859
9,793 (avg. 3.4)
2,360 (82.5%)
33 (1.2%)
Hamming Hamming
3,323
5,855 (avg. 1.8)
2,931 (88.2%)
58 (1.7%)
ISBN Verifier ISBN Verifier
2,528
9,524 (avg. 3.8)
2,015 (79.7%)
27 (1.1%)
Isogram Isogram
2,937
6,984 (avg. 2.4)
2,460 (83.8%)
26 (0.9%)
Nucleotide Count Nucleotide Count
3,584
10,149 (avg. 2.8)
3,045 (85.0%)
44 (1.2%)
PaaS I/O PaaS I/O
2,848
4,152 (avg. 1.5)
1,725 (60.6%)
16 (0.6%)
Palindrome Products Palindrome Products
1,599
6,905 (avg. 4.3)
1,073 (67.1%)
22 (1.4%)
Pangram Pangram
2,720
6,233 (avg. 2.3)
2,367 (87.0%)
44 (1.6%)
Pascal's Triangle Pascal's Triangle
3,246
7,303 (avg. 2.2)
2,663 (82.0%)
31 (1.0%)
Perfect Numbers Perfect Numbers
1,950
4,547 (avg. 2.3)
1,625 (83.3%)
37 (1.9%)
Pig Latin Pig Latin
1,231
3,641 (avg. 3.0)
766 (62.2%)
10 (0.8%)
Queen Attack Queen Attack
2,449
5,266 (avg. 2.2)
2,056 (84.0%)
16 (0.7%)
RNA Transcription RNA Transcription
3,121
8,081 (avg. 2.6)
2,592 (83.1%)
39 (1.2%)
Run-Length Encoding Run-Length Encoding
2,432
7,323 (avg. 3.0)
1,889 (77.7%)
33 (1.4%)
Saddle Points Saddle Points
3,023
5,481 (avg. 1.8)
2,065 (68.3%)
309 (10.2%)
Say Say
1,921
4,864 (avg. 2.5)
1,266 (65.9%)
13 (0.7%)
Scrabble Score Scrabble Score
2,407
4,709 (avg. 2.0)
2,053 (85.3%)
27 (1.1%)
Sieve Sieve
2,575
5,935 (avg. 2.3)
2,131 (82.8%)
29 (1.1%)
Simple Linked List Simple Linked List
4,042
23,097 (avg. 5.7)
2,596 (64.2%)
123 (3.0%)
Spiral Matrix Spiral Matrix
1,330
3,663 (avg. 2.8)
888 (66.8%)
11 (0.8%)
Tournament Tournament
2,655
17,460 (avg. 6.6)
1,916 (72.2%)
65 (2.4%)
Triangle Triangle
2,356
5,715 (avg. 2.4)
1,944 (82.5%)
27 (1.1%)
Two Bucket Two Bucket
1,234
2,328 (avg. 1.9)
642 (52.0%)
13 (1.1%)
Variable Length Quantity Variable Length Quantity
1,225
3,366 (avg. 2.7)
790 (64.5%)
6 (0.5%)
Robot Simulator Robot Simulator
3,070
12,269 (avg. 4.0)
2,525 (82.2%)
45 (1.5%)
Robot Name Robot Name
1,494
6,295 (avg. 4.2)
1,021 (68.3%)
36 (2.4%)
Protein Translation Protein Translation
1,484
6,092 (avg. 4.1)
1,023 (68.9%)
17 (1.1%)
Wordy Wordy
1,064
3,168 (avg. 3.0)
719 (67.6%)
7 (0.7%)
Custom Set Custom Set
1,346
4,954 (avg. 3.7)
889 (66.0%)
16 (1.2%)
Accumulate Accumulate
1,321
4,587 (avg. 3.5)
985 (74.6%)
30 (2.3%)
Affine Cipher Affine Cipher
835
3,726 (avg. 4.5)
543 (65.0%)
6 (0.7%)
Atbash Cipher Atbash Cipher
2,227
6,083 (avg. 2.7)
1,700 (76.3%)
799 (35.9%)
Crypto Square Crypto Square
1,070
2,872 (avg. 2.7)
708 (66.2%)
5 (0.5%)
Diamond Diamond
895
2,528 (avg. 2.8)
607 (67.8%)
1 (0.1%)
Largest Series Product Largest Series Product
1,325
3,534 (avg. 2.7)
1,035 (78.1%)
18 (1.4%)
Luhn From Luhn From
1,277
2,792 (avg. 2.2)
931 (72.9%)
9 (0.7%)
Luhn Trait Luhn Trait
1,108
1,488 (avg. 1.3)
816 (73.6%)
4 (0.4%)
Phone Number Phone Number
1,195
3,659 (avg. 3.1)
897 (75.1%)
20 (1.7%)
Rail Fence Cipher Rail Fence Cipher
834
2,793 (avg. 3.3)
504 (60.4%)
4 (0.5%)
Roman Numerals Roman Numerals
1,437
3,850 (avg. 2.7)
1,069 (74.4%)
11 (0.8%)
Rotational Cipher Rotational Cipher
1,178
2,428 (avg. 2.1)
901 (76.5%)
14 (1.2%)
Simple Cipher Simple Cipher
973
3,415 (avg. 3.5)
617 (63.4%)
6 (0.6%)
Word Count Word Count
1,968
6,635 (avg. 3.4)
1,584 (80.5%)
45 (2.3%)
Secret Handshake Secret Handshake
575
1,876 (avg. 3.3)
452 (78.6%)
14 (2.4%)
Knapsack Knapsack
400
1,879 (avg. 4.7)
247 (61.8%)
4 (1.0%)
Yacht Yacht
513
4,449 (avg. 8.7)
372 (72.5%)
8 (1.6%)
Matrix Matrix
146
547 (avg. 3.7)
113 (77.4%)
0 (0.0%)
Fizzy Fizzy
1,102
5,958 (avg. 5.4)
556 (50.5%)
14 (1.3%)
Pythagorean Triplet Pythagorean Triplet
3,923
7,180 (avg. 1.8)
2,128 (54.2%)
1,317 (33.6%)
Parallel Letter Frequency Parallel Letter Frequency
4,117
23,083 (avg. 5.6)
2,534 (61.5%)
533 (12.9%)
Macros Macros
3,091
16,045 (avg. 5.2)
2,314 (74.9%)
320 (10.4%)
Poker Poker
4,236
26,292 (avg. 6.2)
1,380 (32.6%)
272 (6.4%)
Forth Forth
2,031
15,920 (avg. 7.8)
975 (48.0%)
179 (8.8%)
OCR Numbers OCR Numbers
1,087
3,608 (avg. 3.3)
636 (58.5%)
13 (1.2%)
React React
1,642
6,163 (avg. 3.8)
555 (33.8%)
28 (1.7%)
Circular Buffer Circular Buffer
1,688
6,612 (avg. 3.9)
1,040 (61.6%)
47 (2.8%)
Rectangles Rectangles
1,149
4,669 (avg. 4.1)
599 (52.1%)
13 (1.1%)
Xorcism Xorcism
931
4,843 (avg. 5.2)
348 (37.4%)
27 (2.9%)
Book Store Book Store
750
1,956 (avg. 2.6)
340 (45.3%)
6 (0.8%)
Decimal Decimal
930
4,390 (avg. 4.7)
391 (42.0%)
7 (0.8%)
Grep Grep
916
4,097 (avg. 4.5)
454 (49.6%)
9 (1.0%)
Dominoes Dominoes
884
3,195 (avg. 3.6)
431 (48.8%)
17 (1.9%)
Doubly Linked List Doubly Linked List
965
3,592 (avg. 3.7)
280 (29.0%)
21 (2.2%)
4 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Hexadecimal Hexadecimal
120
184 (avg. 1.5)
114 (95.0%)
10 (8.3%)
Nucleotide Codons Nucleotide Codons
133
157 (avg. 1.2)
129 (97.0%)
1 (0.8%)
Scale Generator Scale Generator
1,132
4,434 (avg. 3.9)
499 (44.1%)
9 (0.8%)
Two Fer Two Fer
23
28 (avg. 1.2)
4 (17.4%)
1 (4.3%)
40 unimplemented practice exercises
Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Bottle Song Bottle Song
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Change Change
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Complex Numbers Complex Numbers
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Connect Connect
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Conway's Game of Life Conway's Game of Life
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D&D Character D&D Character
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Darts Darts
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Error Handling Error Handling
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Flatten Array Flatten Array
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Food Chain Food Chain
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Go Counting Go Counting
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Hangman Hangman
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House House
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Killer Sudoku Helper Killer Sudoku Helper
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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List Ops List Ops
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Markdown Markdown
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Meetup Meetup
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Micro Blog Micro Blog
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POV POV
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Rational Numbers Rational Numbers
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Resistor Color Resistor Color
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Resistor Color Duo Resistor Color Duo
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Resistor Color Trio Resistor Color Trio
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REST API REST API
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Satellite Satellite
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SGF Parsing SGF Parsing
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Square Root Square Root
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Strain Strain
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Transpose Transpose
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Tree Building Tree Building
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Twelve Days Twelve Days
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Word Search Word Search
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Zebra Puzzle Zebra Puzzle
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Zipper Zipper
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3 foregone practice exercises
Binary Binary
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Octal Octal
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Trinary Trinary
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Programming Tags

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

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: 9087311dcf12c7815bdad732da26280ee3227de6 (Takes up to 10 mins to deploy)

Total Test Runner Runs
2,364,569
Test Run Pass Rate
24.6% (581207)
Test Run Fail Rate
22.7% (537812)
Test Run Error Rate
52.7% (1245550)

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: 44459bbd02f8b1d595dd4e2da8cf6bedc1cd7fa6 (Takes up to 10 mins to deploy)

Total Representer Runs
873,652
Total Representation Comments Made
49,819
Feedback Given Frequency
5.7%

Analyzer

Learn More

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

Current version: 478f8f42d6483ac0d0830c55e08d4b0e544480ca (Takes up to 10 mins to deploy)

Total Analyzer Runs
585,397
Total Analysis Comments Made
124,224
Feedback Given Frequency
2.3%