Tasks not implemented in C sharp
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If C sharp is a language you like, or are interested in, please inform your fellow members of the C sharp community; this page can't be emptied without your and their participation.
Tasks not implemented in C sharp
A
- ABC correlation
- ADFGVX cipher
- ASCII art diagram converter
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abelian sandpile model/Identity
- Achilles numbers
- Active Directory/Search for a user
- Anadromes
- Anagram generator
- Anaprimes
- Animated Spinners
- Apéry's constant
- Arena storage pool
- Arithmetic derivative
- Arithmetic evaluation
- Autogram checker
B
- Babylonian spiral
- Benford's law
- Binomial transform
- Bioinformatics/Global alignment
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Biorhythms
- Bitcoin/public point to address
- Bitmap/Bézier curves/Cubic
- Bitmap/Bézier curves/Quadratic
- Bitmap/Histogram
- Bitmap/PPM conversion through a pipe
- Bitmap/Read an image through a pipe
- Boustrophedon transform
- Boyer-Moore string search
- Brilliant numbers
- Bron–Kerbosch algorithm
C
- Calkin-Wilf sequence
- Call a foreign-language function
- Camel case and snake case
- Canny edge detector
- Carmichael 3 strong pseudoprimes
- Catmull–Clark subdivision surface
- Centre and radius of a circle passing through 3 points in a plane
- Check Machin-like formulas
- Check if a polygon overlaps with a rectangle
- Check if two polygons overlap
- Check input device is a terminal
- Chernick's Carmichael numbers
- Circular primes
- Cistercian numerals
- Color quantization
- Colorful numbers
- Colour bars/Display
- Colour pinstripe/Display
- Colour pinstripe/Printer
- Compare sorting algorithms' performance
- Compiler/AST interpreter
- Compiler/Simple file inclusion pre processor
- Compiler/code generator
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Composite numbers k with no single digit factors whose factors are all substrings of k
- Conjugate transpose
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Create an object at a given address
- Cullen and Woodall numbers
- Curzon numbers
- Cycles of a permutation
D
- Dating agency
- De Polignac numbers
- Death Star
- Deceptive numbers
- Deconvolution/1D
- Deconvolution/2D+
- Determine sentence type
- Display an outline as a nested table
- Distance and Bearing
- Dominoes
- Draw a pixel
- Duffinian numbers
E
- EKG sequence convergence
- Earliest difference between prime gaps
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random number generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Engel expansion
- Entropy/Narcissist
- Equal prime and composite sums
- Erdös-Selfridge categorization of primes
- Esthetic numbers
- Euclid-Mullin sequence
- Euler's constant 0.5772...
- Executable library
- Execute Computer/Zero
- Execute SNUSP
- Execute a Markov algorithm
- Exponentiation with infix operators in (or operating on) the base
- Extensible prime generator
- Extreme floating point values
F
- FTP
- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Factorial primes
- Factorions
- Factorize string into Lyndon words
- Fermat numbers
- Fermat pseudoprimes
- Fibonacci word/fractal
- File extension is in extensions list
- File size distribution
- Find Chess960 starting position identifier
- Find duplicate files
- Find if a point is within a triangle
- First class environments
- Fixed length records
- Flipping bits game
- Forbidden numbers
- Formal power series
- Four is magic
- Four is the number of letters in the ...
- Fractal tree
- French Republican calendar
- Function frequency
- Functional coverage tree
G
- GSTrans string conversion
- Galton box animation
- Gaussian primes
- Generate random chess position
- Giuga numbers
- Go Fish
- Goldbach's comet
- Gotchas
- Greatest prime dividing the n-th cubefree number
H
I
- I'm a software engineer, get me out of here
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image convolution
- Inconsummate numbers in base 10
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Inner classes
- Inventory sequence
- Isograms and heterograms
J
K
- K-d tree
- K-means++ clustering
- Keyboard input/Flush the keyboard buffer
- Keyboard macros
- Knuth's algorithm S
- Knuth's power tree
- Koch curve
- Kronecker product based fractals
L
- LU decomposition
- Largest proper divisor of n
- Least m such that n! + m is prime
- Legendre prime counting function
- List rooted trees
- Logistic curve fitting in epidemiology
- Long literals, with continuations
- Longest string challenge
- Lucky and even lucky numbers
- Lychrel numbers
- Lyndon word
M
- Machine code
- Magic numbers
- Magic squares of odd order
- Mastermind
- Matrix digital rain
- Mayan calendar
- Mayan numerals
- Median filter
- Meissel–Mertens constant
- Memory layout of a data structure
- Mertens function
- Minimum multiple of m where digital sum equals m
- Modified random distribution
- Monads/List monad
- Monads/Writer monad
- Multi-base primes
- Musical scale
- Mutex
- Möbius function
N
- Natural sorting
- Nautical bell
- Nested templated data
- Non-transitive dice
- Numbers k such that the last letter of k is the same as the first letter of k+1
- Numbers with equal rises and falls
- Numeric error propagation
- Numerical and alphabetical suffixes
O
- OLE automation
- Odd word problem
- Old Russian measure of length
- One-time pad
- OpenWebNet password
- Optional parameters
- Order by pair comparisons
- Order disjoint list items
- Ormiston pairs
- Ormiston triples
- Own digits power sum
P
- P-Adic numbers, basic
- P-Adic square roots
- Padovan n-step number sequences
- Pairs with common factors
- Palindromic gapful numbers
- Pan base non-primes
- Paraffins
- Particle fountain
- Peano curve
- Pell numbers
- Penta-power prime seeds
- Pentagram
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect totient numbers
- Peripheral drift illusion
- Perlin noise
- Permutations by swapping
- Permutations/Rank of a permutation
- Pig the dice game/Player
- Pinstripe/Printer
- Pisano period
- Plasma effect
- Playfair cipher
- Plot coordinate pairs
- Pragmatic directives
- Prime triangle
- Primes - allocate descendants to their ancestors
- Primes: n*2^m+1
- Product of min and max prime factors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/Middle-square method
- Pseudo-random numbers/Splitmix64
- Pseudo-random numbers/Xorshift star
- Pythagoras tree
Q
R
- RCRPG
- Radical of an integer
- Ramanujan primes/twins
- Ramanujan's constant
- Random sentence from book
- Rate counter
- Read a configuration file
- Record sound
- Reflection/Get source
- Rendezvous
- Repunit primes
- Retrieve and search chat history
- Rhonda numbers
- Riordan numbers
- Rosetta Code/Find bare lang tags
- Rosetta Code/Fix code tags
- Rosetta Code/Rank languages by number of users
- Runtime evaluation
- Runtime evaluation/In an environment
- Ruth-Aaron numbers
S
- SHA-256 Merkle tree
- SOAP
- Scope/Function names and labels
- Sealed classes and methods
- Search in paragraph's text
- Selectively replace multiple instances of a character within a string
- Self-describing numbers
- Sequence of primorial primes
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Set right-adjacent bits
- Set, the card game
- Sexy primes
- Sierpinski arrowhead curve
- Sierpinski pentagon
- Sierpinski square curve
- Sierpinski triangle/Graphical
- Simple turtle graphics
- Simulate input/Keyboard
- Simulate input/Mouse
- Singular value decomposition
- Sisyphus sequence
- Sleeping Beauty problem
- Smallest number k such that k+2^m is composite for all m less than k
- Smarandache prime-digital sequence
- Smarandache-Wellin primes
- Snake
- Sorensen–Dice coefficient
- Sort an outline at every level
- Sorting algorithms/Bead sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Patience sort
- Sorting algorithms/Strand sort
- Sparkline in unicode
- Special characters
- Special variables
- Spinning rod animation/Text
- Square form factorization
- Square-free integers
- State name puzzle
- Steffensen's method
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Strassen's algorithm
- String comparison
- Sub-unit squares
- Sum of elements below main diagonal of matrix
- Summarize and say sequence
- Super-Poulet numbers
- Superellipse
- Superpermutation minimisation
- Sync subtitles
- Syntax highlighting using Mediawiki formatting
T
- Table creation/Postal addresses
- Teacup rim text
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Terminal control/Unicode output
- Text processing/1
- Textonyms
- Thiele's interpolation formula
- Topic variable
- Trabb Pardo–Knuth algorithm
- Transliterate English text using the Greek alphabet
- Tree datastructures
- Twin primes whose sum is square number
- Two bullet roulette
- Two's complement
U
- UPC
- Ukkonen’s suffix tree construction
- Ulam spiral (for primes)
- Undulating numbers
- Universal Lambda Machine
- Unprimeable numbers
- Untouchable numbers
- Update a configuration file
- Use another language to call a function
- User input/Graphical
V
- Variable size/Set
- Variadic fixed-point combinator
- Verhoeff algorithm
- Video display modes
- Vigenère cipher/Cryptanalysis
- Vogel's approximation method
- Voronoi diagram
W
- Wagstaff primes
- War card game
- Wasteful, equidigital and frugal numbers
- Wilson primes of order n
- Window creation/X11
- Window management
- Wolstenholme numbers
- Word ladder
- Word wheel
- Wordiff
- Worthwhile task shaving
Z
Draft tasks not implemented in C sharp
1
3
A
- ABC incremental counts
- ASCII control characters
- Addition-chain exponentiation
- Air mass
- Alternade words
- Append numbers at same position in strings
- Aspect oriented programming
- Assertions in design by contract
- Audio alarm
- Audio frequency generator
- Audio overlap loop
B
- B-spline
- Banker's algorithm
- Base 16 numbers needing a to f
- Binary coded decimal
- Bioinformatics/Subsequence
- Birthday problem
- Black box
- Blackjack strategy
- Boids
- Brace expansion using ranges
C
- CLI-based maze-game
- CORDIC
- Calmo numbers
- CalmoSoft primes
- Carmichael lambda function
- Centroid of a set of N-dimensional points
- Change e letters to i in words
- Changeable words
- Checksumcolor
- Chess player
- Code Golf: Code Golf
- Code segment unload
- Collect and sort square numbers in ascending order from three lists
- Color separation
- Combinations with repetitions/Square digit chain
- Common list elements
- Common sorted list
- Compiler/Preprocessor
- Compiler/Verifying syntax
- Concatenate two primes is also prime
- Conjugate a Latin verb
- Consistent overhead byte stuffing
- Continued fraction convergents
- Convert CSV records to TSV
- Coprime triplets
- Coprimes
- Count how many vowels and consonants occur in a string
- Count the coins/0-1
- Countdown
- Cousin primes
- Create an executable for a program in an interpreted language
- Create an object/Native demonstration
- Create your own text control codes
- Cross compilation
- Cubic special primes
- Curve that touches three points
D
- Day of the week of Christmas and New Year
- Decimal floating point number to binary
- Decision tables
- Digit fifth powers
- Diophantine linear system solving
- Discrete Fourier transform
- Distinct palindromes within decimal numbers
- Distinct power numbers
- Divide a rectangle into a number of unequal triangles
- Double Twin Primes
- Doubly-linked list/Element removal
- Draw pixel 2
E
- Eisenstein primes
- Elevator simulation
- English cardinal anagrams
- Erdős–Woods numbers
- Even numbers which cannot be expressed as the sum of two twin primes
- Exactly three adjacent 3 in lists
- Execute CopyPasta Language
- Exponential digital sums
- Extended Straddling Checkerboard
- External sort
- Extra primes
- Extreme primes
F
- Factor-perfect numbers
- Fibonacci heap
- Find URI in text
- Find adjacent primes which differ by a square integer
- Find first and last set bit of a long integer
- Find first missing positive
- Find minimum number of coins that make a given value
- Find prime n such that reversed n is also prime
- Find prime numbers of the form n*n*n+2
- Find square difference
- Find squares n where n+1 is prime
- Find words which contain all the vowels
- Find words which contain the most consonants
- Find words which contains more than 3 e vowels
- Find words whose first and last three letters are equal
- Find words with alternating vowels and consonants
- Finite state machine
- First 9 prime Fibonacci number
- Four sides of square
G
- Generalised floating point addition
- Generalised floating point multiplication
- Generate random numbers without repeating a value
- Geohash
- Getting the number of decimal places
- Goodstein Sequence
- Gradient descent
- Greed
H
I
- IPC via named pipe
- IRC gateway
- Iccanobif primes
- Input/Output for lines of text
- Integer long division
- Interactive help
- Iterators
J
K
L
- L-system
- Lagrange Interpolation
- Largest difference between adjacent primes
- Largest five adjacent number
- Largest prime factor
- Last list item
- Latin Squares in reduced form/Randomizing using Jacobson and Matthews' technique
- Launch rocket with countdown and acceleration in stdout
- Length of an arc between two angles
- Long stairs
- Longest common suffix
- Longest palindromic substrings
- Longest substrings without repeating characters
- Lucas-Carmichael numbers
M
- Make a backup file
- Marching squares
- Matrix with two diagonals
- Maximum difference between adjacent elements of list
- Minimum number of cells after, before, above and below NxN squares
- Minimum numbers of three lists
- Modulinos
- Morpion solitaire
- Mosaic matrix
- Most frequent k chars distance
- Multiline shebang
- Multiplicatively perfect numbers
- Multiton
N
- N-grams
- N-queens minimum and knights and bishops
- NYSIIS
- Names to numbers
- Native shebang
- Next special primes
- Nice primes
- Nimber arithmetic
- Number triplets game
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers in base 10 that are palindromic in bases 2, 4, and 16
- Numbers in base-16 representation that cannot be written with decimal digits
- Numbers whose binary and ternary digit sums are prime
- Numbers whose count of divisors is prime
- Numbers with same digit set in base 10 and base 16
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method
O
- Odd and square numbers
- Odd words
- One-two primes
- OpenGL pixel shader
- OpenGL/Utah teapot
- Overloaded operators
P
- Palindromic primes
- Palindromic primes in base 16
- Parse EBNF
- Parse command-line arguments
- Penholodigital squares
- Penrose tiling
- Perceptron
- Permutations with repetitions
- Permutations with some identical elements
- Permuted multiples
- Piprimes
- Pollard's rho algorithm
- Polynomial derivative
- Posit numbers/decoding
- Posit numbers/encoding
- Positive decimal integers with the digit 1 occurring exactly twice
- Powerful numbers
- Price list behind API
- Prime numbers p for which the sum of primes less than or equal to p is prime
- Prime numbers which contain 123
- Prime reciprocal sum
- Prime triplets
- Prime words
- Primes whose first and last number is 3
- Primes whose sum of digits is 25
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Product of divisors
- Proof
- Protecting Memory Secrets
- Pseudorandom number generator image
Q
R
- Railway circuit
- Rainbow
- Ramanujan primes
- Ramsey's theorem
- Range modifications
- Raster bars
- Recursive descent parser generator
- Red black tree sort
- Remote agent/Agent interface
- Remote agent/Agent logic
- Remote agent/Simulation
- Resistance calculator
- Resistance network calculator
- Reverse the gender of a string
- Reverse the order of lines in a text file while preserving the contents of each line
- Rice coding
- Robots
- Rodrigues’ rotation formula
- Roots of a cubic polynomial
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Run examples
- Rosetta Code/Tasks without examples
- Run as a daemon or service
S
- SEND + MORE = MONEY
- Safe and Sophie Germain primes
- Safe mode
- Sanitize user input
- Segmentation fault protection
- Selection bias in clinical sciences
- Selective file copy
- Separate the house number from the street name
- Shape-Machine
- Shift list elements to left by 3
- Sierpinski curve
- Simulated annealing
- Simulated optics experiment/Data analysis
- Simulated optics experiment/Simulator
- Sine wave
- Singly-linked list/Reversal
- Smallest enclosing circle problem
- Smallest multiple
- Smallest numbers
- Smallest power of 6 whose decimal expansion contains n
- Solve a Rubik's cube
- Solve equations with substitution method
- Solve hanging lantern problem
- Solve triangle solitaire puzzle
- Solving coin problems
- Sort primes from list to a list
- Sorting algorithms/Cycle sort
- Sorting algorithms/Tree sort on a linked list
- Special factorials
- Special neighbor primes
- Special pythagorean triplet
- Spoof game
- Starting a web browser
- Statistics/Chi-squared distribution
- Steady squares
- Strange numbers
- Strange plus numbers
- Sturmian word
- Substring primes
- Sum data type
- Sum of divisors
- Sum of primes in odd positions is prime
- Sum of square and cube digits of an integer are primes
- Sum of the digits of n is substring of n
- Sum of two adjacent numbers are primes
- Summation of primes
- Sunflower fractal
T
- Table creation
- Tamagotchi emulator
- Terminal control/Restricted width positional input/No wrapping
- Terminal control/Restricted width positional input/With wrapping
- Tetris
- Text completion
- Text to HTML
- Three word location
- Time conventions and conversions
- Topological sort/Extracted top item
- Triangular numbers
U
- URL shortener
- Ulam numbers
- Unicode polynomial equation
- Unique characters
- Unique characters in each string
- Unit testing
- Uno (card game)
- Untrusted environment
- Upside-down numbers
- Use a REST API
- Useless instructions
- User defined pipe and redirection operators
- Using a speech engine to highlight words
V
W
- Walsh matrix
- Wave function collapse
- Waveform analysis/Doh ray me
- Waveform analysis/Top and tail
- Weather routing
- WebGL rotating F
- Welch's t-test
- WiktionaryDumps to words
- Word break problem
- Words containing "the" substring
- Words from neighbour ones
X
Tasks omitted from C sharp
C
I
J
S
End of List
Again, feel free to try your hand at any of the tasks listed on this page.