# Reports:Tasks not implemented in Maple

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## Contents

## Not implemented[edit]

These are currently not implemented in Maple. Please implement some if you can. If any tasks are not possible or too complex in Maple, they should not be on this list. To mark a task as such, add **{{omit from|Maple}}**, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

### A

- ASCII art diagram converter
- AVL tree
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- Abelian sandpile model
- Abelian sandpile model/Identity
- Abstract type
- Active Directory/Connect
- Active Directory/Search for a user
- Active object
- Add a variable to a class instance at runtime
- Aliquot sequence classifications
- Almkvist-Giullera formula for pi
- Amb
- Angles (geometric), normalization and conversion
- Animate a pendulum
- Append a record to the end of a text file
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Arena storage pool
- Arithmetic evaluation
- Associative array/Merging
- Atomic updates
- Average loop length
- Averages/Mean time of day
- Averages/Simple moving average

### B

- Babbage problem
- Balanced ternary
- Barnsley fern
- Base64 decode data
- Benford's law
- Best shuffle
- Bin given limits
- Binary strings
- Bioinformatics/Sequence mutation
- Bioinformatics/base count
- Biorhythms
- Bitcoin/address validation
- Bitcoin/public point to address
- Bitmap/Bézier curves/Cubic
- Bitmap/Bézier curves/Quadratic
- Bitmap/Flood fill
- Bitmap/Histogram
- Bitmap/Midpoint circle algorithm
- Bitmap/PPM conversion through a pipe
- Bitmap/Read a PPM file
- Bitmap/Read an image through a pipe
- Bitmap/Write a PPM file
- Bitwise IO
- Box the compass
- Brace expansion
- Brazilian numbers
- Break OO privacy
- Brownian tree
- Bulls and cows/Player
- Burrows–Wheeler transform

### C

- CRC-32
- CUSIP
- Calendar
- Calendar - for "REAL" programmers
- Calkin-Wilf sequence
- Canny edge detector
- Canonicalize CIDR
- Cantor set
- Carmichael 3 strong pseudoprimes
- Casting out nines
- Catmull–Clark subdivision surface
- Chaocipher
- Chat server
- Check Machin-like formulas
- Check input device is a terminal
- Check output device is a terminal
- Checkpoint synchronization
- Chernick's Carmichael numbers
- Cheryl's birthday
- Church numerals
- Circular primes
- Cistercian numerals
- Classes
- Color of a screen pixel
- Color quantization
- Color wheel
- Colour pinstripe/Printer
- Command-line arguments
- Commatizing numbers
- Compare sorting algorithms' performance
- Compile-time calculation
- Compiler/AST interpreter
- Compiler/code generator
- Compiler/lexical analyzer
- Compiler/syntax analyzer
- Compiler/virtual machine interpreter
- Concurrent computing
- Constrained genericity
- Continued fraction/Arithmetic/Construct from rational number
- Conway's Game of Life
- Copy stdin to stdout
- Create a file on magnetic tape
- Create an HTML table
- Create an object at a given address
- Cumulative standard deviation
- Currying
- Cut a rectangle

### D

- DNS query
- Damm algorithm
- De Bruijn sequences
- Deal cards for FreeCell
- Deconvolution/1D
- Deconvolution/2D+
- Deepcopy
- Define a primitive data type
- Delegates
- Deming's Funnel
- Determine if a string is collapsible
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Dice game probabilities
- Digital root
- Digital root/Multiplicative digital root
- Dinesman's multiple-dwelling problem
- Dining philosophers
- Display a linear combination
- Display an outline as a nested table
- Distributed programming
- Diversity prediction theorem
- Documentation
- Doubly-linked list/Definition
- Doubly-linked list/Element definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Dragon curve
- Draw a clock
- Draw a pixel
- Dutch national flag problem
- Dynamic variable names

### E

- EKG sequence convergence
- Eban numbers
- Echo server
- Eertree
- Egyptian division
- Egyptian fractions
- Elementary cellular automaton
- Elementary cellular automaton/Infinite length
- Elementary cellular automaton/Random Number Generator
- Elliptic Curve Digital Signature Algorithm
- Elliptic curve arithmetic
- Enforced immutability
- Entropy
- Entropy/Narcissist
- Enumerations
- Equilibrium index
- Ethiopian multiplication
- Euler's identity
- Euler's sum of powers conjecture
- Events
- Evolutionary algorithm
- Executable library
- Execute Brain****
- Execute HQ9+
- Execute SNUSP
- Execute a Markov algorithm
- Exponentiation operator
- Extend your language
- Extensible prime generator
- Extreme floating point values

### F

- FASTA format
- FTP
- Faces from a mesh
- Factorial base numbers indexing permutations of a collection
- Factorions
- Factors of a Mersenne number
- Fairshare between two and more
- Faulhaber's formula
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- File modification time
- File size distribution
- Find duplicate files
- Find limit of recursion
- Find palindromic numbers in both binary and ternary bases
- First-class functions/Use numbers analogously
- First class environments
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- Fivenum
- Fixed length records
- Flow-control structures
- Floyd-Warshall algorithm
- Forest fire
- Fork
- Formal power series
- Forward difference
- Four bit adder
- Four is magic
- Four is the number of letters in the ...
- Fractal tree
- Fraction reduction
- French Republican calendar
- Function composition
- Function frequency
- Function prototype
- Functional coverage tree
- Fusc sequence

### G

- GUI/Maximum window dimensions
- Galton box animation
- Gapful numbers
- Gauss-Jordan matrix inversion
- Gaussian elimination
- Generate Chess960 starting position
- Generate random chess position
- Generator/Exponential
- Get system command output
- Globally replace text in several files
- Go Fish
- Graph colouring
- Gray code
- Greatest subsequential sum
- Greyscale bars/Display
- Guess the number/With feedback (player)

### H

- HTTPS/Authenticated
- HTTPS/Client-authenticated
- Hamming numbers
- Handle a signal
- Harshad or Niven series
- Hash join
- Hello world/Web server
- Here document
- Heronian triangles
- Hickerson series of almost integers
- Higher-order functions
- Hilbert curve
- History variables
- Hofstadter-Conway $10,000 sequence
- Hofstadter Figure-Figure sequences
- Holidays related to Easter
- Honeycombs
- Horizontal sundial calculations
- Host introspection
- Huffman coding
- Humble numbers
- Hunt the Wumpus

### I

- IBAN
- ISBN13 check digit
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Imaginary base numbers
- Increasing gaps between consecutive Niven numbers
- Index finite lists of positive integers
- Inheritance/Multiple
- Inheritance/Single
- Integer overflow
- Inverted index
- Inverted syntax
- Isqrt (integer square root) of X
- Iterated digits squaring

### J

### K

- K-d tree
- K-means++ clustering
- Kernighans large earthquake problem
- Keyboard input/Flush the keyboard buffer
- Keyboard input/Keypress check
- Keyboard input/Obtain a Y or N response
- Keyboard macros
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knapsack problem/Unbounded
- Knight's tour
- Knuth's algorithm S
- Knuth's power tree
- Knuth shuffle
- Koch curve
- Kolakoski sequence
- Kosaraju
- Kronecker product
- Kronecker product based fractals

### L

- LZW compression
- Lah numbers
- Langton's ant
- Largest int from concatenated ints
- Largest number divisible by its digits
- Largest proper divisor of n
- Last letter-first letter
- Latin Squares in reduced form
- Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique
- Law of cosines - triples
- Levenshtein distance/Alignment
- Linear congruential generator
- List comprehensions
- List rooted trees
- Literals/Integer
- Long literals, with continuations
- Long year
- Longest string challenge
- Loops/With multiple ranges
- Lucas-Lehmer test
- Lucky and even lucky numbers
- Ludic numbers
- Luhn test of credit card numbers
- Lychrel numbers

### M

- MAC Vendor Lookup
- MD4
- MD5/Implementation
- Machine code
- Mad Libs
- Magic 8-ball
- Magic squares of doubly even order
- Magic squares of odd order
- Magic squares of singly even order
- Main step of GOST 28147-89
- Make directory path
- Man or boy test
- Mastermind
- Matrix chain multiplication
- Matrix digital rain
- Maximum triangle path sum
- Mayan numerals
- Maze generation
- Maze solving
- McNuggets problem
- Median filter
- Memory layout of a data structure
- Menu
- Merge and aggregate datasets
- Mertens function
- Metallic ratios
- Metaprogramming
- Metered concurrency
- Metronome
- Mian-Chowla sequence
- Miller–Rabin primality test
- Mind boggling card trick
- Minesweeper game
- Minimal steps down to 1
- Minkowski question-mark function
- Modified random distribution
- Modular arithmetic
- Monads/List monad
- Monads/Maybe monad
- Monads/Writer monad
- Monte Carlo methods
- Monty Hall problem
- Morse code
- Mouse position
- Move-to-front algorithm
- Multi-dimensional array
- Multiple distinct objects
- Multisplit
- Munching squares
- Musical scale
- Mutex

### N

- N-smooth numbers
- Naming conventions
- Narcissist
- Natural sorting
- Nautical bell
- Negative base numbers
- Nested templated data
- Next highest int from digits
- Nim game
- Nimber arithmetic
- Non-continuous subsequences
- Non-decimal radices/Input
- Non-decimal radices/Output
- Non-transitive dice
- Nonoblock
- Nonogram solver
- Number reversal game
- Numeric error propagation
- Numerical and alphabetical suffixes
- Numerical integration
- Numerical integration/Gauss-Legendre Quadrature

### O

### P

- P-Adic numbers, basic
- P-Adic square roots
- P-value correction
- Padovan n-step number sequences
- Padovan sequence
- Palindrome dates
- Palindromic gapful numbers
- Pancake numbers
- Paraffins
- Parallel brute force
- Parallel calculations
- Parametric polymorphism
- Parametrized SQL statement
- Parse an IP Address
- Parsing/RPN calculator algorithm
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Partial function application
- Partition an integer x into n primes
- Password generator
- Pathological floating point problems
- Pattern matching
- Peaceful chess queen armies
- Peano curve
- Pell's equation
- Penney's game
- Percentage difference between images
- Percolation/Bond percolation
- Percolation/Mean cluster density
- Percolation/Mean run density
- Percolation/Site percolation
- Perfect shuffle
- Perlin noise
- Permutation test
- Permutations/Derangements
- Permutations/Rank of a permutation
- Permutations by swapping
- Pi
- Pierpont primes
- Pig the dice game/Player
- Pinstripe/Display
- Pinstripe/Printer
- Pisano period
- Plasma effect
- Play recorded sounds
- Playfair cipher
- Playing cards
- Pointers and references
- Poker hand analyser
- Polymorphic copy
- Polymorphism
- Polyspiral
- Population count
- Pragmatic directives
- Primality by Wilson's theorem
- Prime conspiracy
- Primes - allocate descendants to their ancestors
- Priority queue
- Probabilistic choice
- Problem of Apollonius
- Program name
- Program termination
- Proper divisors
- Pseudo-random numbers/Combined recursive generator MRG32k3a
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Xorshift star
- Pythagoras tree
- Pythagorean quadruples
- Pythagorean triples

### R

- RCRPG
- RIPEMD-160
- RPG attributes generator
- RSA code
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Random Latin squares
- Random number generator (device)
- Random number generator (included)
- Random sentence from book
- Range consolidation
- Ranking methods
- Rare numbers
- Rate counter
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Recaman's sequence
- Record sound
- Reflection/Get source
- Reflection/List methods
- Reflection/List properties
- Remove lines from a file
- Rendezvous
- Repeat
- Resistor mesh
- Respond to an unknown method call
- Retrieve and search chat history
- Rock-paper-scissors
- Rosetta Code/Rank languages by number of users
- Run-length encoding
- Runge-Kutta method
- Runtime evaluation
- Runtime evaluation/In an environment

### S

- S-expressions
- SEDOLs
- SHA-256
- SHA-256 Merkle tree
- SOAP
- SQL-based authentication
- Safe addition
- Sailors, coconuts and a monkey problem
- Same fringe
- Scope/Function names and labels
- Scope modifiers
- Secure temporary file
- Self-describing numbers
- Self numbers
- Semordnilap
- Send an unknown method call
- Send email
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence of primes by trial division
- Sequence of primorial primes
- Set consolidation
- Set of real numbers
- Set puzzle
- Seven-sided dice from five-sided dice
- Sexy primes
- Shortest common supersequence
- Show ASCII table
- Show the epoch
- Sierpinski carpet
- Sierpinski pentagon
- Sierpinski triangle/Graphical
- Simple database
- Simple windowed application
- Simulate input/Keyboard
- Simulate input/Mouse
- Singleton
- Singly-linked list/Element definition
- Singly-linked list/Element insertion
- Singly-linked list/Traversal
- Sleeping Beauty problem
- Smarandache prime-digital sequence
- Sockets
- Sokoban
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve the no connection puzzle
- Sort a list of object identifiers
- Sort an array of composite structures
- Sort an outline at every level
- Sort numbers lexicographically
- Sort stability
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Bead sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Counting sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Radix sort
- Sorting algorithms/Sleep sort
- Sorting algorithms/Strand sort
- Soundex
- Sparkline in unicode
- Special characters
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Square Form Factorization
- Square but not cube
- Stable marriage problem
- Stack traces
- Stair-climbing puzzle
- Start from a main routine
- State name puzzle
- Stern-Brocot sequence
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Straddling checkerboard
- Strassen's algorithm
- Stream merge
- String comparison
- String interpolation (included)
- Strip block comments
- Strip control codes and extended characters from a string
- Subleq
- Substitution cipher
- Subtractive generator
- Successive prime differences
- Sudoku
- Suffixation of decimal numbers
- Sum and product puzzle
- Sum to 100
- Summarize and say sequence
- Sunflower fractal
- Super-d numbers
- Superpermutation minimisation
- Sutherland-Hodgman polygon clipping
- Synchronous concurrency
- System time

### T

- Table creation/Postal addresses
- Take notes on the command line
- Tarjan
- Tau function
- Tau number
- Taxicab numbers
- Teacup rim text
- Terminal control/Clear the screen
- Terminal control/Coloured text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Display an extended character
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Terminal control/Ringing the terminal bell
- Terminal control/Unicode output
- Test a function
- Test integerness
- Text processing/1
- Text processing/2
- Text processing/Max licenses in use
- Textonyms
- The ISAAC Cipher
- The Name Game
- Thiele's interpolation formula
- Thue-Morse
- Tic-tac-toe
- Tokenize a string with escaping
- Tonelli-Shanks algorithm
- Top rank per group
- Topic variable
- Topological sort
- Topswops
- Total circles area
- Totient function
- Tree datastructures
- Tree from nesting levels
- Tree traversal
- Truncate a file
- Truth table
- Twelve statements

### U

- UPC
- URL parser
- UTF-8 encode and decode
- Ukkonen’s suffix tree construction
- Ulam spiral (for primes)
- Unbias a random generator
- Undefined values
- Unicode strings
- Unicode variable names
- Universal Turing machine
- Unix/ls
- Unprimeable numbers
- Untouchable numbers
- Update a configuration file
- Use another language to call a function
- User input/Graphical

### V

- Validate International Securities Identification Number
- Vampire number
- Van Eck sequence
- Variable-length quantity
- Variable size/Get
- Variable size/Set
- Variadic function
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Video display modes
- Vigenère cipher
- Vigenère cipher/Cryptanalysis
- Vogel's approximation method
- Voronoi diagram

### W

- Walk a directory/Non-recursively
- Walk a directory/Recursively
- Water collected between towers
- Weird numbers
- Window creation
- Window creation/X11
- Window management
- Wireworld
- Word frequency
- Word ladder
- Word search
- Word wheel
- Word wrap
- World Cup group stage
- Write float arrays to a text file
- Write language name in 3D ASCII
- Write to Windows event log

### Draft tasks without implementation[edit]

These tasks are drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in Maple (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

### A

### B

### C

- CLI-based maze-game
- Card shuffles
- Change e letters to i in words
- Changeable words
- Chebyshev coefficients
- Checksumcolor
- Chemical calculator
- Chess player
- Cipolla's algorithm
- Code segment unload
- Combinations with repetitions/Square digit chain
- Common list elements
- Common sorted list
- Compiler/Simple file inclusion pre processor
- Compiler/Verifying syntax
- Concatenate two primes is also prime
- Consecutive Primes With Ascending Or Descending Differences
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Coprime triplets
- Coprimes
- Count how many vowels and consonants occur in a string
- Count the coins/0-1
- Cousin primes
- Create an object/Native demonstration
- Cubic Special Primes
- Curve that touches three points
- Cycle detection
- Cyclops numbers

### D

### E

### F

- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find first and last set bit of a long integer
- Find first missing positive
- Find if a point is within a triangle
- Find prime n for that reversed n is also prime
- Find prime numbers of the form n*n*n+2
- Find words which contains all the vowels
- Find words which contains more than 3 e vowels
- Find words which contains most consonants
- Find words which first and last three letters are equals
- Find words with alternating vowels and consonants
- Finite state machine
- Fortunate numbers
- Free polyominoes enumeration
- Frobenius numbers

### G

### I

### L

### M

- Magnanimous numbers
- Make a backup file
- Markov chain text generator
- Maximum difference between adjacent elements of list
- Mayan calendar
- Mersenne primes
- Mine a bitcoin
- Minimum number of cells after, before, above and below NxN squares
- Minimum positive multiple in base 10 using only 0 and 1
- Modulinos
- Montgomery reduction
- Morpion solitaire
- Most frequent k chars distance
- Multi-base primes
- Multidimensional Newton-Raphson method
- Multiline shebang
- Möbius function

### N

- N-body problem
- NYSIIS
- Names to numbers
- Native shebang
- Neighbour primes
- Next special primes
- Nice primes
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers in base-16 representation that cannot be written with decimal digits
- Numbers in base 10 that are palindromic in bases 2, 4, and 16
- Numbers n in which number 1 occur twice
- Numbers which binary and ternary digit sum are prime
- Numbers which count of divisors is prime
- Numbers with equal rises and falls
- Numbers with prime digits whose sum is 13
- Numbers with same digit set in base 10 and base 16
- Numeric separator syntax
- Numerical integration/Adaptive Simpson's method

### P

- Palindromic primes
- Palindromic primes in base 16
- Parse EBNF
- Parse command-line arguments
- Particle swarm optimization
- Penrose tiling
- Pentomino tiling
- Perceptron
- Permutations with repetitions
- Permutations with some identical elements
- Piprimes
- Polynomial synthetic division
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime numbers p which sum of prime numbers less or equal to p is prime
- Prime numbers which contain 123
- Prime triplets
- Prime words
- Primes which contain only one odd number
- Primes which sum of digits is 25
- Primes whose first and last number is 3
- Primes with digits in nondecreasing order
- Print debugging statement
- Print itself
- Process SMIL directives in XML data
- Product of divisors
- Proof
- Pseudo-random numbers/Splitmix64
- Pseudorandom number generator image

### R

- Railway circuit
- Ramsey's theorem
- Range modifications
- Raster bars
- Readline interface
- Recursive descent parser generator
- Remote agent/Agent interface
- Remote agent/Agent logic
- Remote agent/Simulation
- Remove vowels from a string
- Resistance calculator
- Resistance network calculator
- Reverse the gender of a string
- Robots
- Rosetta Code/List authors of task descriptions
- Rosetta Code/Run examples
- Rosetta Code/Tasks without examples
- Run as a daemon or service

### S

- Safe mode
- Sattolo cycle
- Selective file copy
- Self-hosting compiler
- Separate the house number from the street name
- Shift list elements to left by 3
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Sierpinski arrowhead curve
- Sierpinski curve
- Sierpinski square curve
- Simple turtle graphics
- Simulated annealing
- Sine wave
- Singly-linked list/Element removal
- Smallest enclosing circle problem
- Smallest numbers
- Smallest power of 6 whose decimal expansion contains n
- Smallest square that begins with n
- Snake
- Snake and Ladder
- Solve a Rubik's Cube
- Solve triangle solitare puzzle
- Solving coin problems
- Sort the letters of string in alphabetical order
- Sorting algorithms/Cycle sort
- Sorting algorithms/Tree sort on a linked list
- Special Divisors
- Special factorials
- Spoof game
- Square root by hand
- Starting a web browser
- Strange numbers
- Strange unique prime triplets
- Subset sum problem
- Substring primes
- Suffix tree
- Sum data type
- Sum of divisors
- Sum of elements below main diagonal of matrix
- Sum of first n cubes
- Sum of the digits of n is substring of n
- Summarize primes
- Sylvester's sequence

### 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-based one-time password algorithm
- Topological sort/Extracted top item
- Transportation problem
- Triplet of three numbers
- Twin primes
- Two bullet roulette
- Two identical strings
- Type detection

### U

### W

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in Maple, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

### Other pages[edit]

These are other pages related to Maple which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

### No pages found.

## Not Considered[edit]

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that Maple was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

### No pages found.

## End of List[edit]

Again, feel free to try your hand at any of the tasks listed on this page.