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holes.toml
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holes.toml
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# TODO
#
# Art
# - Swallowed a Fly
#
# Computing
# - Deadfish
#
# Mathematics
# - γ (Euler–Mascheroni constant)
# - K (Khinchin's constant)
#
# Sequence
# - Fortunate Numbers
# - Lucky Numbers
# - Lucky Primes
# - Perfect Numbers
# - Semiprime Numbers
# - Sphenic Numbers
# - Triangular Numbers
#
# Transform
# - ISBN Check Digit
# - £sd
['12 Days of Christmas']
category = 'Art'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/The_Twelve_Days_of_Christmas_(song)' },
]
preamble = '''
<p>Print the lyrics to the song <b>The 12 Days of Christmas</b>:</p>
<blockquote>On the First day of Christmas
My true love sent to me
A Partridge in a Pear Tree.
…
On the Twelfth day of Christmas
My true love sent to me
Twelve Drummers Drumming,
Eleven Pipers Piping,
Ten Lords-a-Leaping,
Nine Ladies Dancing,
Eight Maids-a-Milking,
Seven Swans-a-Swimming,
Six Geese-a-Laying,
Five Gold Rings,
Four Calling Birds,
Three French Hens,
Two Turtle Doves, and
A Partridge in a Pear Tree.
</blockquote>
'''
['99 Bottles of Beer']
category = 'Art'
links = [
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/99_Bottles_of_Beer' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/99_Bottles_of_Beer' },
]
preamble = '''
<p>Print the lyrics to the song <b>99 Bottles of Beer</b>:</p>
<blockquote>99 bottles of beer on the wall, 99 bottles of beer.
Take one down and pass it around, 98 bottles of beer on the wall.
98 bottles of beer on the wall, 98 bottles of beer.
Take one down and pass it around, 97 bottles of beer on the wall.
…
1 bottle of beer on the wall, 1 bottle of beer.
Take one down and pass it around, no more bottles of beer on the wall.
No more bottles of beer on the wall, no more bottles of beer.
Go to the store and buy some more, 99 bottles of beer on the wall.
</blockquote>
'''
['Abundant Numbers']
category = 'Sequence'
links = [
{ name = 'OEIS A005101', url = '//oeis.org/A005101' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Abundant_number' },
]
preamble = '''
<p>
An abundant number is a number for which the sum of its proper divisors
(divisors not including the number itself) is greater than the number
itself. For example <b>12</b> is abundant because its proper divisors are
<b>1</b>, <b>2</b>, <b>3</b>, <b>4</b>, and <b>6</b> which add up to
<b>16</b>.
<p>
Print all the abundant numbers from <b>1</b> to <b>200</b> inclusive, each
on their own line.
'''
['Arabic to Roman']
category = 'Transform'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Roman_numerals' },
]
preamble = '''
<p>For each arabic numeral argument print the same number in roman numerals.
'''
[brainfuck]
category = 'Computing'
links = [
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Execute_Brain****' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Brainfuck' },
]
preamble = '''
<p>
Brainfuck is a minimalistic esoteric programming language created by
Urban Müller in 1993.
<p>
Assuming an infinitely large array, the entire brainfuck alphabet matches
the following pseudocode:
<div>
<table>
<thead>
<tr>
<th>Cmd
<th>Pseudocode
<tbody>
<tr>
<th>>
<td>ptr++
<tr>
<th><
<td>ptr--
<tr>
<th>+
<td>array[ptr]++
<tr>
<th>-
<td>array[ptr]--
<tr>
<th>.
<td>print(chr(array[ptr]))
<tr>
<th>[
<td>while(array[ptr]){
<tr>
<th>]
<td>}
</table>
</div>
<p>
Write a program that will receive various brainfuck programs as arguments
and execute each program in turn.
'''
['Christmas Trees']
category = 'Art'
preamble = '''
<p>
Print a size ascending range of Christmas trees using asterisks, ranging
from size <b>3</b> to size <b>9</b>, each tree separated by a blank line.
<p>
A size <b>3</b> tree should look like this, with a single centered
asterisk for the trunk:
<pre> *
***
*****
*
</pre>
<p>With the largest size <b>9</b> tree looking like this:
<pre> *
***
*****
*******
*********
***********
*************
***************
*****************
*
</pre>
'''
['CSS Colors']
category = 'Transform'
preamble = '''
<svg class=hide>
<symbol id="color" viewBox="0 0 1 1" xmlns="http://www.w3.org/2000/symbol">
<rect width="1" height="1"/>
</symbol>
</svg>
Given each CSS color keyword print the corresponding hex value. The output
will be checked case-insensitively. The full mapping is as follows:
<div id=colors>
<table>
<thead>
<tr><th>Keyword<th>Hex
<tbody>
<tr><td><svg><use fill="#cd5c5c" href="#color"/></svg>IndianRed
<td>#cd5c5c
<tr><td><svg><use fill="#f08080" href="#color"/></svg>LightCoral
<td>#f08080
<tr><td><svg><use fill="#fa8072" href="#color"/></svg>Salmon
<td>#fa8072
<tr><td><svg><use fill="#e9967a" href="#color"/></svg>DarkSalmon
<td>#e9967a
<tr><td><svg><use fill="#ffa07a" href="#color"/></svg>LightSalmon
<td>#ffa07a
<tr><td><svg><use fill="#ff0000" href="#color"/></svg>Red
<td>#ff0000
<tr><td><svg><use fill="#dc143c" href="#color"/></svg>Crimson
<td>#dc143c
<tr><td><svg><use fill="#b22222" href="#color"/></svg>FireBrick
<td>#b22222
<tr><td><svg><use fill="#8b0000" href="#color"/></svg>DarkRed
<td>#8b0000
<tr><td><svg><use fill="#ffc0cb" href="#color"/></svg>Pink
<td>#ffc0cb
<tr><td><svg><use fill="#ffb6c1" href="#color"/></svg>LightPink
<td>#ffb6c1
<tr><td><svg><use fill="#ff69b4" href="#color"/></svg>HotPink
<td>#ff69b4
<tr><td><svg><use fill="#ff1493" href="#color"/></svg>DeepPink
<td>#ff1493
<tr><td><svg><use fill="#c71585" href="#color"/></svg>MediumVioletRed
<td>#c71585
<tr><td><svg><use fill="#db7093" href="#color"/></svg>PaleVioletRed
<td>#db7093
<tr><td><svg><use fill="#ff7f50" href="#color"/></svg>Coral
<td>#ff7f50
<tr><td><svg><use fill="#ff6347" href="#color"/></svg>Tomato
<td>#ff6347
<tr><td><svg><use fill="#ff4500" href="#color"/></svg>OrangeRed
<td>#ff4500
<tr><td><svg><use fill="#ff8c00" href="#color"/></svg>DarkOrange
<td>#ff8c00
<tr><td><svg><use fill="#ffa500" href="#color"/></svg>Orange
<td>#ffa500
<tr><td><svg><use fill="#ffd700" href="#color"/></svg>Gold
<td>#ffd700
<tr><td><svg><use fill="#ffff00" href="#color"/></svg>Yellow
<td>#ffff00
<tr><td><svg><use fill="#ffffe0" href="#color"/></svg>LightYellow
<td>#ffffe0
<tr><td><svg><use fill="#fffacd" href="#color"/></svg>LemonChiffon
<td>#fffacd
<tr><td><svg><use fill="#fafad2" href="#color"/></svg>LightGoldenRodYellow
<td>#fafad2
<tr><td><svg><use fill="#ffefd5" href="#color"/></svg>PapayaWhip
<td>#ffefd5
<tr><td><svg><use fill="#ffe4b5" href="#color"/></svg>Moccasin
<td>#ffe4b5
<tr><td><svg><use fill="#ffdab9" href="#color"/></svg>PeachPuff
<td>#ffdab9
<tr><td><svg><use fill="#eee8aa" href="#color"/></svg>PaleGoldenRod
<td>#eee8aa
<tr><td><svg><use fill="#f0e68c" href="#color"/></svg>Khaki
<td>#f0e68c
<tr><td><svg><use fill="#bdb76b" href="#color"/></svg>DarkKhaki
<td>#bdb76b
<tr><td><svg><use fill="#e6e6fa" href="#color"/></svg>Lavender
<td>#e6e6fa
<tr><td><svg><use fill="#d8bfd8" href="#color"/></svg>Thistle
<td>#d8bfd8
<tr><td><svg><use fill="#dda0dd" href="#color"/></svg>Plum
<td>#dda0dd
<tr><td><svg><use fill="#ee82ee" href="#color"/></svg>Violet
<td>#ee82ee
<tr><td><svg><use fill="#da70d6" href="#color"/></svg>Orchid
<td>#da70d6
<tr><td><svg><use fill="#ff00ff" href="#color"/></svg>Fuchsia
<td>#ff00ff
</table>
<table>
<thead>
<tr><th>Keyword<th>Hex
<tbody>
<tr><td><svg><use fill="#ff00ff" href="#color"/></svg>Magenta
<td>#ff00ff
<tr><td><svg><use fill="#ba55d3" href="#color"/></svg>MediumOrchid
<td>#ba55d3
<tr><td><svg><use fill="#9370db" href="#color"/></svg>MediumPurple
<td>#9370db
<tr><td><svg><use fill="#8a2be2" href="#color"/></svg>BlueViolet
<td>#8a2be2
<tr><td><svg><use fill="#9400d3" href="#color"/></svg>DarkViolet
<td>#9400d3
<tr><td><svg><use fill="#9932cc" href="#color"/></svg>DarkOrchid
<td>#9932cc
<tr><td><svg><use fill="#8b008b" href="#color"/></svg>DarkMagenta
<td>#8b008b
<tr><td><svg><use fill="#800080" href="#color"/></svg>Purple
<td>#800080
<tr><td><svg><use fill="#4b0082" href="#color"/></svg>Indigo
<td>#4b0082
<tr><td><svg><use fill="#483d8b" href="#color"/></svg>DarkSlateBlue
<td>#483d8b
<tr><td><svg><use fill="#6a5acd" href="#color"/></svg>SlateBlue
<td>#6a5acd
<tr><td><svg><use fill="#7b68ee" href="#color"/></svg>MediumSlateBlue
<td>#7b68ee
<tr><td><svg><use fill="#663399" href="#color"/></svg>RebeccaPurple
<td>#663399
<tr><td><svg><use fill="#adff2f" href="#color"/></svg>GreenYellow
<td>#adff2f
<tr><td><svg><use fill="#7fff00" href="#color"/></svg>Chartreuse
<td>#7fff00
<tr><td><svg><use fill="#7cfc00" href="#color"/></svg>LawnGreen
<td>#7cfc00
<tr><td><svg><use fill="#00ff00" href="#color"/></svg>Lime
<td>#00ff00
<tr><td><svg><use fill="#32cd32" href="#color"/></svg>LimeGreen
<td>#32cd32
<tr><td><svg><use fill="#98fb98" href="#color"/></svg>PaleGreen
<td>#98fb98
<tr><td><svg><use fill="#90ee90" href="#color"/></svg>LightGreen
<td>#90ee90
<tr><td><svg><use fill="#00ff7f" href="#color"/></svg>SpringGreen
<td>#00ff7f
<tr><td><svg><use fill="#00fa9a" href="#color"/></svg>MediumSpringGreen
<td>#00fa9a
<tr><td><svg><use fill="#3cb371" href="#color"/></svg>MediumSeaGreen
<td>#3cb371
<tr><td><svg><use fill="#2e8b57" href="#color"/></svg>SeaGreen
<td>#2e8b57
<tr><td><svg><use fill="#228b22" href="#color"/></svg>ForestGreen
<td>#228b22
<tr><td><svg><use fill="#008000" href="#color"/></svg>Green
<td>#008000
<tr><td><svg><use fill="#006400" href="#color"/></svg>DarkGreen
<td>#006400
<tr><td><svg><use fill="#9acd32" href="#color"/></svg>YellowGreen
<td>#9acd32
<tr><td><svg><use fill="#6b8e23" href="#color"/></svg>OliveDrab
<td>#6b8e23
<tr><td><svg><use fill="#808000" href="#color"/></svg>Olive
<td>#808000
<tr><td><svg><use fill="#556b2f" href="#color"/></svg>DarkOliveGreen
<td>#556b2f
<tr><td><svg><use fill="#66cdaa" href="#color"/></svg>MediumAquamarine
<td>#66cdaa
<tr><td><svg><use fill="#8fbc8f" href="#color"/></svg>DarkSeaGreen
<td>#8fbc8f
<tr><td><svg><use fill="#20b2aa" href="#color"/></svg>LightSeaGreen
<td>#20b2aa
<tr><td><svg><use fill="#008b8b" href="#color"/></svg>DarkCyan
<td>#008b8b
<tr><td><svg><use fill="#008080" href="#color"/></svg>Teal
<td>#008080
<tr><td><svg><use fill="#00ffff" href="#color"/></svg>Aqua
<td>#00ffff
</table>
<table>
<thead>
<tr><th>Keyword<th>Hex
<tbody>
<tr><td><svg><use fill="#00ffff" href="#color"/></svg>Cyan
<td>#00ffff
<tr><td><svg><use fill="#e0ffff" href="#color"/></svg>LightCyan
<td>#e0ffff
<tr><td><svg><use fill="#afeeee" href="#color"/></svg>PaleTurquoise
<td>#afeeee
<tr><td><svg><use fill="#7fffd4" href="#color"/></svg>Aquamarine
<td>#7fffd4
<tr><td><svg><use fill="#40e0d0" href="#color"/></svg>Turquoise
<td>#40e0d0
<tr><td><svg><use fill="#48d1cc" href="#color"/></svg>MediumTurquoise
<td>#48d1cc
<tr><td><svg><use fill="#00ced1" href="#color"/></svg>DarkTurquoise
<td>#00ced1
<tr><td><svg><use fill="#5f9ea0" href="#color"/></svg>CadetBlue
<td>#5f9ea0
<tr><td><svg><use fill="#4682b4" href="#color"/></svg>SteelBlue
<td>#4682b4
<tr><td><svg><use fill="#b0c4de" href="#color"/></svg>LightSteelBlue
<td>#b0c4de
<tr><td><svg><use fill="#b0e0e6" href="#color"/></svg>PowderBlue
<td>#b0e0e6
<tr><td><svg><use fill="#add8e6" href="#color"/></svg>LightBlue
<td>#add8e6
<tr><td><svg><use fill="#87ceeb" href="#color"/></svg>SkyBlue
<td>#87ceeb
<tr><td><svg><use fill="#87cefa" href="#color"/></svg>LightSkyBlue
<td>#87cefa
<tr><td><svg><use fill="#00bfff" href="#color"/></svg>DeepSkyBlue
<td>#00bfff
<tr><td><svg><use fill="#1e90ff" href="#color"/></svg>DodgerBlue
<td>#1e90ff
<tr><td><svg><use fill="#6495ed" href="#color"/></svg>CornflowerBlue
<td>#6495ed
<tr><td><svg><use fill="#4169e1" href="#color"/></svg>RoyalBlue
<td>#4169e1
<tr><td><svg><use fill="#0000ff" href="#color"/></svg>Blue
<td>#0000ff
<tr><td><svg><use fill="#0000cd" href="#color"/></svg>MediumBlue
<td>#0000cd
<tr><td><svg><use fill="#00008b" href="#color"/></svg>DarkBlue
<td>#00008b
<tr><td><svg><use fill="#000080" href="#color"/></svg>Navy
<td>#000080
<tr><td><svg><use fill="#191970" href="#color"/></svg>MidnightBlue
<td>#191970
<tr><td><svg><use fill="#fff8dc" href="#color"/></svg>Cornsilk
<td>#fff8dc
<tr><td><svg><use fill="#ffebcd" href="#color"/></svg>BlanchedAlmond
<td>#ffebcd
<tr><td><svg><use fill="#ffe4c4" href="#color"/></svg>Bisque
<td>#ffe4c4
<tr><td><svg><use fill="#ffdead" href="#color"/></svg>NavajoWhite
<td>#ffdead
<tr><td><svg><use fill="#f5deb3" href="#color"/></svg>Wheat
<td>#f5deb3
<tr><td><svg><use fill="#deb887" href="#color"/></svg>Burlywood
<td>#deb887
<tr><td><svg><use fill="#d2b48c" href="#color"/></svg>Tan
<td>#d2b48c
<tr><td><svg><use fill="#bc8f8f" href="#color"/></svg>RosyBrown
<td>#bc8f8f
<tr><td><svg><use fill="#f4a460" href="#color"/></svg>SandyBrown
<td>#f4a460
<tr><td><svg><use fill="#daa520" href="#color"/></svg>GoldenRod
<td>#daa520
<tr><td><svg><use fill="#b8860b" href="#color"/></svg>DarkGoldenRod
<td>#b8860b
<tr><td><svg><use fill="#cd853f" href="#color"/></svg>Peru
<td>#cd853f
<tr><td><svg><use fill="#d2691e" href="#color"/></svg>Chocolate
<td>#d2691e
<tr><td><svg><use fill="#8b4513" href="#color"/></svg>SaddleBrown
<td>#8b4513
</table>
<table>
<thead>
<tr><th>Keyword<th>Hex
<tbody>
<tr><td><svg><use fill="#a0522d" href="#color"/></svg>Sienna
<td>#a0522d
<tr><td><svg><use fill="#a52a2a" href="#color"/></svg>Brown
<td>#a52a2a
<tr><td><svg><use fill="#800000" href="#color"/></svg>Maroon
<td>#800000
<tr><td><svg><use fill="#ffffff" href="#color"/></svg>White
<td>#ffffff
<tr><td><svg><use fill="#fffafa" href="#color"/></svg>Snow
<td>#fffafa
<tr><td><svg><use fill="#f0fff0" href="#color"/></svg>Honeydew
<td>#f0fff0
<tr><td><svg><use fill="#f5fffa" href="#color"/></svg>MintCream
<td>#f5fffa
<tr><td><svg><use fill="#f0ffff" href="#color"/></svg>Azure
<td>#f0ffff
<tr><td><svg><use fill="#f0f8ff" href="#color"/></svg>AliceBlue
<td>#f0f8ff
<tr><td><svg><use fill="#f8f8ff" href="#color"/></svg>GhostWhite
<td>#f8f8ff
<tr><td><svg><use fill="#f5f5f5" href="#color"/></svg>WhiteSmoke
<td>#f5f5f5
<tr><td><svg><use fill="#fff5ee" href="#color"/></svg>SeaShell
<td>#fff5ee
<tr><td><svg><use fill="#f5f5dc" href="#color"/></svg>Beige
<td>#f5f5dc
<tr><td><svg><use fill="#fdf5e6" href="#color"/></svg>OldLace
<td>#fdf5e6
<tr><td><svg><use fill="#fffaf0" href="#color"/></svg>FloralWhite
<td>#fffaf0
<tr><td><svg><use fill="#fffff0" href="#color"/></svg>Ivory
<td>#fffff0
<tr><td><svg><use fill="#faebd7" href="#color"/></svg>AntiqueWhite
<td>#faebd7
<tr><td><svg><use fill="#faf0e6" href="#color"/></svg>Linen
<td>#faf0e6
<tr><td><svg><use fill="#fff0f5" href="#color"/></svg>LavenderBlush
<td>#fff0f5
<tr><td><svg><use fill="#ffe4e1" href="#color"/></svg>MistyRose
<td>#ffe4e1
<tr><td><svg><use fill="#dcdcdc" href="#color"/></svg>Gainsboro
<td>#dcdcdc
<tr><td><svg><use fill="#d3d3d3" href="#color"/></svg>LightGray
<td>#d3d3d3
<tr><td><svg><use fill="#d3d3d3" href="#color"/></svg>LightGrey
<td>#d3d3d3
<tr><td><svg><use fill="#c0c0c0" href="#color"/></svg>Silver
<td>#c0c0c0
<tr><td><svg><use fill="#a9a9a9" href="#color"/></svg>DarkGray
<td>#a9a9a9
<tr><td><svg><use fill="#a9a9a9" href="#color"/></svg>DarkGrey
<td>#a9a9a9
<tr><td><svg><use fill="#808080" href="#color"/></svg>Gray
<td>#808080
<tr><td><svg><use fill="#808080" href="#color"/></svg>Grey
<td>#808080
<tr><td><svg><use fill="#696969" href="#color"/></svg>DimGray
<td>#696969
<tr><td><svg><use fill="#696969" href="#color"/></svg>DimGrey
<td>#696969
<tr><td><svg><use fill="#778899" href="#color"/></svg>LightSlateGray
<td>#778899
<tr><td><svg><use fill="#778899" href="#color"/></svg>LightSlateGrey
<td>#778899
<tr><td><svg><use fill="#708090" href="#color"/></svg>SlateGray
<td>#708090
<tr><td><svg><use fill="#708090" href="#color"/></svg>SlateGrey
<td>#708090
<tr><td><svg><use fill="#2f4f4f" href="#color"/></svg>DarkSlateGray
<td>#2f4f4f
<tr><td><svg><use fill="#2f4f4f" href="#color"/></svg>DarkSlateGrey
<td>#2f4f4f
<tr><td><svg><use fill="#000000" href="#color"/></svg>Black
<td>#000000
</table>
'''
[Cubes]
category = 'Art'
preamble = '''
<p>
Draw <b>7</b> cubes in increasing size using "╱" (U+2571) for the diagonal
edges, "│" (U+2502) for the vertical edges, "─" (U+2500) for the
horizontal edges, and "█" (U+2588) for the vertices. The cubes should
range from size <b>1</b> to size <b>7</b> with a blank line between each
cube. A size <b>1</b> cube should look like:
<pre> █────█
╱ ╱│
█────█ │
│ │ █
│ │╱
█────█
</pre>
<p>And a size <b>7</b> cube should look like:
<pre> █────────────────────────────█
╱ ╱│
╱ ╱ │
╱ ╱ │
╱ ╱ │
╱ ╱ │
╱ ╱ │
╱ ╱ │
█────────────────────────────█ │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ █
│ │ ╱
│ │ ╱
│ │ ╱
│ │ ╱
│ │ ╱
│ │ ╱
│ │╱
█────────────────────────────█
</pre>
'''
[Diamonds]
category = 'Art'
preamble = '''
<p>
Print a size ascending range of Diamonds using the numbers <b>1</b> to
<b>9</b>, ranging from size <b>1</b> to size <b>9</b>, each diamond
separated by a blank line.<p>A size <b>1</b> diamond should look like
this, a single centered <b>1</b>:
<pre> 1</pre>
<p>With the largest size <b>9</b> diamond looking like this:
<pre> 1
121
12321
1234321
123454321
12345654321
1234567654321
123456787654321
12345678987654321
123456787654321
1234567654321
12345654321
123454321
1234321
12321
121
1
</pre>
'''
[Divisors]
category = 'Sequence'
preamble = '''
<p>
A number is a divisor of another number if it can divide into it with no
remainder.
<p>
Print the positive divisors of each number from <b>1</b> to <b>100</b>
inclusive, on their own line, with each divisor separated by a space.
'''
['Emirp Numbers']
category = 'Sequence'
links = [
{ name = 'OEIS A006567', url = '//oeis.org/A006567' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Emirp' },
]
preamble = '''
<p>
An emirp (prime spelled backwards) is a prime number that results in a
different prime when its decimal digits are reversed. For example both
<b>13</b> and <b>31</b> are emirps.
<p>
Print all the emirp numbers from <b>1</b> to <b>1000</b> inclusive, each
on their own line.
'''
['Ellipse Perimeters']
category = 'Mathematics'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Ellipse' },
]
experiment = -1
preamble = '''
<p>
Given the two radii of an ellipse, compute its perimeter and print
its integer part.
'''
[Emojify]
category = 'Transform'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/List_of_emoticons' },
]
preamble = '''
<p>
Given each of the following ASCII emoticons print the corresponding
Unicode emoji.
<p>Note despite how they appear below, there are no spaces in the emoticons.
<div id=emojify>
<div>😀<pre> :-D</pre></div>
<div>🙂<pre> :-)</pre></div>
<div>😐<pre> :-|</pre></div>
<div>🙁<pre> :-(</pre></div>
<div>😕<pre> :-\</pre></div>
<div>😗<pre> :-*</pre></div>
<div>😮<pre> :-O</pre></div>
<div>🤐<pre> :-#</pre></div>
<div>😅<pre>':-D</pre></div>
<div>😓<pre>':-(</pre></div>
<div>😂<pre>:'-)</pre></div>
<div>😢<pre>:'-(</pre></div>
<div>😛<pre> :-P</pre></div>
<div>😜<pre> ;-P</pre></div>
<div>😝<pre> X-P</pre></div>
<div>😆<pre> X-)</pre></div>
<div>😇<pre>O:-)</pre></div>
<div>😉<pre> ;-)</pre></div>
<div>😳<pre> :-$</pre></div>
<div>😶<pre> :- </pre></div>
<div>😎<pre> B-)</pre></div>
<div>😏<pre> :-J</pre></div>
<div>😈<pre>}:-)</pre></div>
<div>👿<pre>}:-(</pre></div>
<div>😡<pre> :-@</pre></div>
</div>
'''
['Evil Numbers']
category = 'Sequence'
links = [
{ name = 'OEIS A001969', url = '//oeis.org/A001969' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Evil_number' },
]
preamble = '''
<p>
An evil number is a non-negative number that has an even number of 1s in
its binary expansion.
<p>
Print all the evil numbers from <b>0</b> to <b>50</b> inclusive, each on
their own line.
<p>
Numbers that are not evil are called
<a href=odious-numbers>odious numbers</a>.
'''
[Fibonacci]
category = 'Sequence'
links = [
{ name = 'OEIS A000045', url = '//oeis.org/A000045' },
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Fibonacci_sequence' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Fibonacci_number' },
]
preamble = '''
<p>
Print the first <b>31</b> Fibonacci numbers from <b>F<sub>0</sub> = 0</b>
to <b>F<sub>30</sub> = 832040</b> (inclusive), each on a separate line.
'''
['Fizz Buzz']
category = 'Sequence'
links = [
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/FizzBuzz' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Fizz_buzz' },
]
preamble = '''
<p>
Print the numbers from <b>1</b> to <b>100</b> inclusive, each on their own
line.
<p>
If, however, the number is a multiple of <b>three</b> then print
<b>Fizz</b> instead, and if the number is a multiple of <b>five</b> then
print <b>Buzz</b>.
<p>
For numbers which are multiples of <b>both three and five</b> then print
<b>FizzBuzz</b>.
'''
['Happy Numbers']
category = 'Sequence'
links = [
{ name = 'OEIS A007770', url = '//oeis.org/A007770' },
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Happy_numbers' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Happy_number' },
]
preamble = '''
<p>
A happy number is defined by the following Sequence: Starting with any
positive integer, replace the number by the sum of the squares of its
digits in base-ten, and repeat the process until the number either equals
1 (where it will stay), or it loops endlessly in a cycle that does not
include 1. Those numbers for which this process ends in 1 are happy
numbers, while those that do not end in 1 are sad numbers.
<p>For example, 19 is happy, as the associated Sequence is:</p>
<dl>
<dd>1<sup>2</sup> + 9<sup>2</sup> = 82
<dd>8<sup>2</sup> + 2<sup>2</sup> = 68
<dd>6<sup>2</sup> + 8<sup>2</sup> = 100
<dd>1<sup>2</sup> + 0<sup>2</sup> + 0<sup>2</sup> = 1.
</dl>
<p>
Print all the happy numbers from <b>1</b> to <b>200</b> inclusive, each on
their own line.
'''
[Intersection]
category = 'Mathematics'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Intersection' },
]
preamble = '''
<p>A box is defined via <b>x</b>, <b>y</b>, <b>w</b> and <b>h</b> as
<pre>
y
│ ┌───w───┐
│ │ ┌───┼──┐
│ h │▓▓▓│ │
│ │ │▓▓▓│ │
│ o───┼───┘ │
│ o──────┘
└───────────────x
(0,0)
</pre>
<p>Compute the intersection area between two boxes given as
<pre>x1 y1 w1 h1 x2 y2 w2 h2</pre>
'''
['Julia Set']
category = 'Art'
experiment = -1
links = [
{ name = 'Wikipedia', url = '//en.wikipedia.org/wiki/Julia_set'},
{ name = 'Rosettacode', url = '//rosettacode.org/wiki/Julia_set'}
]
preamble = '''
<p>
In a 500x500px canvas, draw the Julia for f(z) = z^2 + c, where c = -0.4 + 0.6i. Output the image in ppm grayscale format.
'''
['Kolakoski Constant']
category = 'Mathematics'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Kolakoski_sequence#Kolakoski_Constant' },
]
preamble = '''
<p>
The Kolakoski constant is created by taking the
<a href=kolakoski-sequence>Kolakoski sequence</a> and subtracting one from
each element then interpreting it as a binary fraction.
<pre>
1 221121221221121122121121…
0.110010110110010011010010…
0.7945071927…
</pre>
<p>Print the Kolakoski constant to the first 1,000 decimal places.
'''
['Kolakoski Sequence']
category = 'Sequence'
links = [
{ name = 'OEIS A000002', url = '//oeis.org/A000002' },
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Kolakoski_sequence' },
]
preamble = '''
<p>
The Kolakoski sequence is a self referential sequence where the nth
element is the length of the nth run of same numbers in the sequence.
This has the interesting property where if you take the run lengths of
this sequence, then you will get the same sequence back again. For
example, the sequence starting with (1, 2) looks like:
<pre>
1 2 2 1 1 2 1 2 2 1 2 2 1 1 2 1 1 2 2 1 2 1 1 2 1…
1 2 2 1 1 2 1 2 2 1 2 2 1 1 2 1 1…
</pre>
<p>
Beginning with (1, 2) output the first 1000 elements in the Kolakoski
sequence, separated by spaces.
'''
['Leap Years']
category = 'Sequence'
links = [
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Leap_year' },
]
preamble = '''
<p>
In the Gregorian calendar, a leap year is created by extending February
to 29 days in order to keep the calendar year synchronized with the
astronomical year. These longer years occur in years which are multiples
of <b>4</b>, with the exception of centennial years that aren’t multiples
of <b>400</b>.
<p>
Write a program to print all the leap years from the year <b>1800</b> up
to and including <b>2400</b>.
'''
['Levenshtein Distance']
category = 'Transform'
links = [
{ name = 'Rosetta Code', url = '//rosettacode.org/wiki/Levenshtein_distance' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Levenshtein_distance' },
]
preamble = '''
<p>
The Levenshtein distance is the minimum number of single character edits
that are needed to transform one word into another. The available edits
are deletion, insertion, or substitution of a single character.
<p>
For example the Levenshtein distance between <b>“shine”</b> and
<b>“train”</b> is 4:
<ol>
<li>shine → shin (deletion of 'e')
<li>shin → <b>t</b>shin (insertion of 't')
<li>t<b>s</b>hin → t<b>r</b>hin (substitution of 's' for 'r')
<li>tr<b>h</b>in → tr<b>a</b>in (substitution of 'h' for 'a')
</ol>
<p>
For each pair of words per argument, print the Levenshtein distance on its
own line.
'''
['Leyland Numbers']
category = 'Sequence'
links = [
{ name = 'OEIS A076980', url = '//oeis.org/A076980' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Leyland_number' },
]
preamble = '''
<p>
A leyland number is of the form <b>x<sup>y</sup> + y<sup>x</sup></b> where
<b>1 < y ≤ x</b>.
<p>
For example, <b>8</b> is a leyland number because
<b>2<sup>2</sup> + 2<sup>2</sup> = 8</b>.
<p>
Print all the leyland numbers from <b>1</b> to <b>100,000,000,000</b>
inclusive, each on their own line.
'''
['Look and Say']
category = 'Sequence'
links = [
{ name = 'OEIS A005150', url = '//oeis.org/A005150' },
{ name = 'Rosetta Code', url = '//www.rosettacode.org/wiki/Look-and-say_sequence' },
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Look-and-say_sequence' },
]
preamble = '''
<p>
The Look and Say sequence starts with 1 and is continued by looking
at each of the runs of the same number in the previous element and combining
the length with the original number. For example the next element after
111221 would be 312211 (three ones, two twos and one one).
<p>Print the first 20 elements of the Look and Say sequence.
'''
['Lucky Tickets']
category = 'Mathematics'
preamble = '''
<p>
In Russia, bus ticket numbers consist of 6 decimal digits. It is considered lucky when the sum of the first three digits equals the sum of the last three digits. The concept of lucky tickets can be extended to ticket numbering systems with even numbers of digits and arbitrary bases.
<p>
Each argument describes a ticket numbering system and consists of two numbers separated by a space. The first is the even number of digits. The second is the base of the numbering system (2-16). For each argument, output the total number of lucky tickets for the numbering system on a separate line.
'''
[Mandelbrot]
category = 'Art'
experiment = -1
links = [
{ name = 'Wikipedia', url = '//en.wikipedia.org/wiki/Mandelbrot_set'},
{ name = 'Rosettacode', url = '//rosettacode.org/wiki/Mandelbrot_set'},
]
preamble = '''
<p>
Draw the Mandelbrot set in a 40x80 unicode grid by using ▒ (U+2592)
and █ (U+2588).
'''
[Maze]
category = 'Gaming'
experiment = 338
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Maze_solving_algorithm' },
]
preamble = '''
<p>
For each input maze, find the shortest path from <b>S</b>tart to <b>E</b>nd points. Output the path in the maze with dots. For example:
<pre>
███████████ ███████████
█S█ E█ █S█ ....E█
█ ███ █████ █.███.█████
█ █ █ → █...█.....█
███ █████ █ ███.█████.█
█ █ █ .......█
███████████ ███████████
</pre>
'''
['Morse Decoder']
category = 'Transform'
links = [
{ name = 'Wikipedia', url = '//www.wikipedia.org/wiki/Morse_code' },
]
preamble = '''
<p>
Using ▄ (U+2584 Lower Half Block) to represent a dot, decode the argument
from International Morse Code to alphanumeric.
<ol>
<li>The length of a dot is one unit.
<li>A dash is three units.
<li>The space between parts of the same letter is one unit.
<li>The space between letters is three units.
<li>The space between words is ten units.
</ol>
<div id=morse>
<table>
<thead>
<tr>
<th>Chr.
<th>Code