Rosetta Code/Count examples/Full list

Full output for the Rosetta Code/Count examples#Raku task. Updated periodically.

This is something of a experiment. The top 10 languages have their completed task entries marked with a circled digit in the table so you can sort on the language to see which tasks have been done. Hold down control and click on several columns to do secondary, tertiary, etc. sorts. Ideally it would be nice to be able to generate the table for any language but it is fairly intensive to generate. Once a week is ok, on demand would be unsustainable.

See Rosetta_Code/Rank_languages_by_popularity/Full_list for a full language/task completion table.

Top ten programming languages by number of task examples completed:
① Go
② Phix
③ Julia
④ Raku
⑤ Python
⑥ Perl
⑦ Kotlin
⑧ C
⑨ Java
⑩ Racket

As of 2020-11-08T21:50:53Z :: Tasks: 1075 :: Draft Tasks:211 :: Total Tasks: 1286 :: Total Examples: 70896

Count	Task	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
474	Hello world/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
316	99 bottles of beer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
312	100 doors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
306	FizzBuzz	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
282	Fibonacci sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
281	Factorial	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
271	Comments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
260	A+B	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
254	Empty program	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
236	Function definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
224	Loops/Infinite	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
221	Reverse a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
219	Arrays	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
218	Loops/While	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
215	Ackermann function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
204	Loops/For	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
200	Conditional structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
196	Arithmetic/Integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
195	Greatest element of a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
188	Greatest common divisor	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
185	Array concatenation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
185	Repeat a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
184	Averages/Arithmetic mean	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
184	Integer comparison	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
182	Increment a numerical string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
181	Even or odd	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
180	Loops/Downward for	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
175	Hello world/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
171	Copy a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
168	Boolean values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
165	Character codes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
163	String concatenation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
162	Apply a callback to an array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
162	Loops/Do-while	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
161	Array length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
161	Sum and product of an array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	Binary digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	Hello world/Newline omission	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	Loops/For with a specified step	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	Loops/Foreach	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	Sieve of Eratosthenes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
160	String length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
158	Loops/Break	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
157	Loops/N plus one half	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	Integer sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	String case	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
155	Sum of a series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
154	Palindrome detection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
153	Generic swap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
153	Tokenize a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
153	Towers of Hanoi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
152	Leap year	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
152	Logical operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
151	Dot product	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
151	Empty string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
151	Hailstone sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
151	Rot-13	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
151	Sum of squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Associative array/Creation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
148	Filter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Execute a system command	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Factors of an integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Sort an integer array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
145	Sorting algorithms/Bubble sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
144	Quine	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
142	Guess the number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
141	Caesar cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
140	Higher-order functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
140	User input/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
139	Determine if a string is numeric	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
139	Remove duplicate elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
138	File input/output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
137	Roman numerals/Encode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
136	Hello world/Standard error	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
136	System time	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Bitwise operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Command-line arguments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Day of the week	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
134	Sorting algorithms/Quicksort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
133	Primality by trial division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
133	Read entire file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
132	Create a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Luhn test of credit card numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Sleep	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
131	Substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
130	Loop over multiple arrays simultaneously	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
129	Loops/Continue	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
129	Stack	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
128	Check that file exists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Generate lower case ASCII alphabet	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Literals/String	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
127	Mutual recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Happy numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
126	Pascal's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
125	Date format	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Least common multiple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
124	Zero to the zero power	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
123	Binary search	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
122	Flatten a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Include a file	①	②	③	④	⑤	⑥	⑦		⑨	⑩
121	Literals/Integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
121	Variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Balanced brackets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Compound data type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Detect division by zero	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
120	Program termination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
119	Function composition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
119	Loops/Nested	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
118	ABC problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
118	Associative array/Iteration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
118	Formatted numeric output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
118	Knuth shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Averages/Root mean square	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Ethiopian multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
117	Null object	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	File size	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Hash from two arrays	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	N-queens problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Read a file line by line	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
116	Search a list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
115	Mandelbrot set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
115	Sorting algorithms/Insertion sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
114	Classes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
114	Delete a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Case-sensitivity of identifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Count in octal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Count occurrences of a substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Guess the number/With feedback	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Matrix multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Multiplication tables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
113	Roman numerals/Decode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Averages/Median	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Hostname	①	②	③	④	⑤	⑥	⑦		⑨	⑩
112	Identity matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Input loop	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Matrix transposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
112	Real constants and functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
111	Environment variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
111	Random numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
111	String matching	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Anagrams	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Babbage problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Perfect numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
110	Rename a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Align columns	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	HTTP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Haversine formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Pick random element	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
109	Return multiple values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
108	Accumulator factory	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
108	Arithmetic/Complex	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
108	Find limit of recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
107	Conway's Game of Life	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Letter frequency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
106	Pangram checker	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
105	Assertions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
105	Horner's rule for polynomial evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
105	Infinity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
105	Temperature conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Averages/Pythagorean means	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Catalan numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Program name	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Strip a set of characters from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
104	Variadic function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Arithmetic-geometric mean	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Levenshtein distance	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Permutations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
103	Substring/Top and tail	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Evaluate binomial coefficients	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Exceptions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Regular expressions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Run-length encoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
102	Zig-zag matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	Combinations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	String append	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
101	Strip whitespace from a string/Top and tail	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Anonymous recursion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Nth root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Prime decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Queue/Definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	String interpolation (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
100	Trigonometric functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Comma quibbling	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Reverse words in a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
99	Sorting algorithms/Merge sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Short-circuit evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
98	Sorting algorithms/Selection sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	24 game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Bulls and cows	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
97	Look-and-say sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	Ordered words	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	Shell one-liner	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
96	Y combinator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
95	Create a two-dimensional array at runtime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
95	Interactive programming	①	②	③	④	⑤	⑥	⑦		⑨	⑩
95	Sierpinski triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Arbitrary-precision integers (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Call a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Collections	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Enumerations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
94	Middle three digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Range extraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	String prepend	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
93	Vector products	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Evolutionary algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Exponentiation operator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	First-class functions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Power set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Sorting algorithms/Gnome sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Sum multiples of 3 and 5	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
92	Time a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Create an HTML table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Execute Brain****	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Range expansion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
91	Sorting algorithms/Cocktail sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Inheritance/Single	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	MD5	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Random number generator (included)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Sequence of non-squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Sierpinski carpet	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Sum digits of an integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
90	Walk a directory/Non-recursively	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Averages/Mode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Averages/Simple moving average	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	Cumulative standard deviation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
89	One-dimensional cellular automata	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	Digital root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	JSON	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
88	Sort using a custom comparator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Entropy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Forward difference	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	Langton's ant	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	N'th	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
87	String comparison	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Five weekends	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Hamming numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Monty Hall problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	Symmetric difference	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
86	The Twelve Days of Christmas	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	CSV data manipulation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Dragon curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Harshad or Niven series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
85	Sorting algorithms/Bogosort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Abstract type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Abundant, deficient and perfect number classifications	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Greatest subsequential sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Josephus problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Price fraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
84	Window creation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	CSV to HTML translation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Compare a list of strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Sort an array of composite structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
83	Tree traversal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Closures/Value capture	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	File modification time	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Gray code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Hello world/Newbie	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Last Friday of each month	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Menu	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
82	Number names	①	②	③	④		⑥	⑦	⑧	⑨	⑩
81	Map range	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Simple windowed application	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
81	Sorting algorithms/Heapsort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Amicable pairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Box the compass	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Introspection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
80	Queue/Usage	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Catamorphism	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Hello world/Line printer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Literals/Floating point	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Non-decimal radices/Convert	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Number reversal game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Read a specific line from a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	SEDOLs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Spiral matrix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Walk a directory/Recursively	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
79	Web scraping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Count in factors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Floyd's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Monte Carlo methods	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Singly-linked list/Traversal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	Terminal control/Clear the screen	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
78	URL decoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Bitmap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Calculating the value of e	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Concurrent computing	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Count the coins	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Find common directory path	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Roots of unity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Sockets	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Sorting algorithms/Shell sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	Terminal control/Ringing the terminal bell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
77	XML/Input	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Call an object method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Knapsack problem/0-1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Playing cards	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Show the epoch	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
76	Top rank per group	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Address of a variable	①	②	③	④	⑤	⑥	⑦		⑨	⑩
75	CRC-32	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Date manipulation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Dynamic variable names	①	②	③	④	⑤	⑥	⑦		⑨	⑩
75	Hofstadter Q sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Order two numerical lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Proper divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Pythagorean triples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Sorting algorithms/Counting sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	Strip comments from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
75	URL encoding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Almost prime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Averages/Mean angle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Fibonacci n-step number sequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Find the last Sunday of each month	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Keyboard input/Obtain a Y or N response	①	②	③	④	⑤	⑥	⑦	⑧		⑩
74	Linear congruential generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Long multiplication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Lucas-Lehmer test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Multifactorial	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
74	Word wrap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Hello world/Web server	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Here document	①	②	③	④	⑤	⑥	⑦	⑧		⑩
73	Kaprekar numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Man or boy test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Modular inverse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Non-decimal radices/Output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Sorting algorithms/Comb sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
73	Soundex	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	List comprehensions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Operator precedence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Semordnilap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
72	Unicode variable names	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Anagrams/Deranged anagrams	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Animation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Calendar	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Empty directory	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Equilibrium index	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Exceptions/Catch an exception thrown in a nested call	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Find the missing permutation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Gamma function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Jensen's Device	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Multiple distinct objects	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Phrase reversals	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Pi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	SHA-1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	SHA-256	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Singly-linked list/Element definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Special characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
71	Take notes on the command line	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Bitmap/Bresenham's line algorithm	①	②	③	④	⑤	⑥		⑧	⑨	⑩
70	Flow-control structures	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Parsing/RPN calculator algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Read a configuration file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Repeat	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
70	Split a character string based on change of character	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	AKS test for primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Draw a sphere	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Execute HQ9+	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Four bit adder	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	IBAN	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Polymorphism	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Quaternion type	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Rock-paper-scissors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Sort disjoint sublist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Sudoku	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
69	Write entire file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	15 puzzle game	①	②	③	④	⑤	⑥	⑦	⑧		⑩
68	Call a foreign-language function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Convert seconds to compound duration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Enforced immutability	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Euler's sum of powers conjecture	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Guess the number/With feedback (player)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Horizontal sundial calculations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Self-describing numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Stair-climbing puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Trabb Pardo–Knuth algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Vigenère cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
68	Write float arrays to a text file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Combinations with repetitions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Constrained random points on a circle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Currying	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Fork	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Longest common subsequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Munchausen numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Numerical integration	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Sorting algorithms/Stooge sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
67	Zeckendorf number representation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Benford's law	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Catalan numbers/Pascal's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Closest-pair problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Fractal tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
66	Maze generation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Arithmetic/Rational	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Largest int from concatenated ints	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Magic squares of odd order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Named parameters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Optional parameters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Population count	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Sort stability	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
65	Variable size/Get	①	②	③	④	⑤	⑥	⑦	⑧		⑩
64	Euler method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Extend your language	①	②	③	④	⑤	⑥	⑦		⑨	⑩
64	Hofstadter-Conway $10,000 sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Inheritance/Multiple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Morse code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Runtime evaluation	①		③	④	⑤	⑥	⑦		⑨	⑩
64	Show ASCII table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
64	Text processing/Max licenses in use	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Amb	①	②	③	④	⑤	⑥	⑦	⑧		⑩
63	Cholesky decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Continued fraction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Documentation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Fast Fourier transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Jump anywhere	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Remove lines from a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Roots of a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Special variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Strip control codes and extended characters from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Undefined values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Unix/ls	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	Van der Corput sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
63	XML/Output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Factors of a Mersenne number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	HTTPS	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Memory allocation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Narcissistic decimal number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Nested function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	One of n lines in a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Pernicious numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Priority queue	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Singly-linked list/Element insertion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Sorting algorithms/Pancake sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
62	Write language name in 3D ASCII	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Chinese remainder theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	General FizzBuzz	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Get system command output	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Probabilistic choice	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Rep-string	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
61	Sorting algorithms/Sleep sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Arithmetic evaluation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Barnsley fern	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Binary strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Circles of given radius through two points	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Modular exponentiation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Old lady swallowed a fly	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Plot coordinate pairs	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Reduced row echelon form	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Roots of a quadratic function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Runge-Kutta method	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Semiprime	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Sequence of primes by trial division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
60	Test a function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Animate a pendulum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Averages/Mean time of day	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Dinesman's multiple-dwelling problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Draw a clock	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Exponentiation order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Globally replace text in several files	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Host introspection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Non-decimal radices/Input	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	User input/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
59	Word frequency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	24 game/Solve	①	②	③	④	⑤	⑥	⑦		⑨	⑩
58	9 billion names of God the integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Anti-primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Mouse position	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Partial function application	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Thue-Morse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Tic-tac-toe	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
58	Unicode strings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Angle difference between two bearings	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Brownian tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Generator/Exponential	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Huffman coding	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Knapsack problem/Continuous	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Knapsack problem/Unbounded	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	LZW compression	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Left factorials	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Miller–Rabin primality test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
57	Sorting algorithms/Bead sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	4-rings or 4-squares puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Add a variable to a class instance at runtime	①	②	③	④	⑤	⑥	⑦
56	Best shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Compile-time calculation	①	②	③	④		⑥	⑦	⑧		⑩
56	Deal cards for FreeCell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Dutch national flag problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Emirp primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Fibonacci word	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Hash join	①	②	③	④	⑤	⑥	⑦		⑨	⑩
56	JortSort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Knight's tour	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Singleton	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Sort three variables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Sorting algorithms/Permutation sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Stem-and-leaf plot	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	Truncatable primes	①	②	③	④		⑥	⑦	⑧	⑨	⑩
56	Two sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
56	XML/XPath	①		③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Bitmap/Write a PPM file	①	②	③	④	⑤	⑥	⑦	⑧		⑩
55	Define a primitive data type	①	②	③	④	⑤	⑥	⑦		⑨	⑩
55	Department numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Extreme floating point values	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Forest fire	①	②	③	④	⑤	⑥		⑧	⑨	⑩
55	I before E except after C	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Matrix-exponentiation operator	①	②	③	④	⑤	⑥	⑦	⑧		⑩
55	Odd word problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Scope modifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Stack traces	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
55	Terminal control/Display an extended character	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	2048	①	②	③	④	⑤		⑦	⑧	⑨	⑩
54	Delegates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Doubly-linked list/Element definition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Grayscale image	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Integer overflow	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Jewels and stones	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Leonardo numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Multisplit	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Munching squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Random number generator (device)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Runtime evaluation/In an environment	①		③	④	⑤	⑥	⑦		⑨	⑩
54	Sierpinski triangle/Graphical	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
54	Yin and yang	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Base64 encode data	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Draw a cuboid	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Extract file extension	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Pointers and references	①	②	③	④	⑤	⑥	⑦		⑨	⑩
53	Rosetta Code/Rank languages by popularity	①	②	③	④	⑤	⑥	⑦	⑧		⑩
53	Send email	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Subleq	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Synchronous concurrency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	Terminal control/Cursor positioning	①	②	③	④	⑤	⑥	⑦			⑩
53	Topological sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
53	XML/DOM serialization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Bernoulli numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	CUSIP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Handle a signal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Inverted syntax	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Iterated digits squaring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Maximum triangle path sum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Statistics/Basic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Text processing/2	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
52	Truncate a file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	100 prisoners	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Cartesian product of two or more lists	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Draw a pixel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	First-class functions/Use numbers analogously	①	②	③	④	⑤	⑥	⑦			⑩
51	Keyboard input/Keypress check	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Longest common prefix	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Ludic numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
51	Mad Libs	①	②	③	④	⑤	⑥	⑦		⑨	⑩
51	Modulinos	①	②	③	④	⑤	⑥		⑧	⑨	⑩
51	Ternary logic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Chinese zodiac	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Convert decimal number to rational	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Dining philosophers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Discordian date	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Heronian triangles	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Non-continuous subsequences	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Quickselect algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Respond to an unknown method call	①	②	③	④	⑤	⑥	⑦			⑩
50	Terminal control/Coloured text	①	②	③	④	⑤	⑥	⑦	⑧		⑩
50	Unbias a random generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Universal Turing machine	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
50	Wireworld	①	②	③	④	⑤	⑥		⑧	⑨	⑩
49	Archimedean spiral	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Attractive numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Farey sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Fractran	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	GUI component interaction	①	②	③	④	⑤		⑦	⑧	⑨	⑩
49	Long year?	①	②	③	④	⑤	⑥	⑦		⑨
49	Seven-sided dice from five-sided dice	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Text processing/1	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
49	Validate International Securities Identification Number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Call a function in a shared library	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Colour bars/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Damm algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Dijkstra's algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Extensible prime generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	FASTA format	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Find the intersection of two lines	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Longest increasing subsequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Smith numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Strip block comments	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
48	Tokenize a string with escaping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Abundant odd numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	DNS query	①	②	③	④		⑥	⑦			⑩
47	Doubly-linked list/Element insertion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Doubly-linked list/Traversal	①	②	③	④	⑤		⑦	⑧	⑨	⑩
47	Echo server	①		③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Gaussian elimination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Loops/Increment loop index within loop body	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Make directory path	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Move-to-front algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Polymorphic copy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Polynomial regression	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Rate counter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Shoelace formula for polygonal area	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Vector	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
47	Zebra puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Append a record to the end of a text file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Bitmap/Flood fill	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Determine if only one instance is running	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Egyptian division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Greyscale bars/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Holidays related to Easter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Jaro distance	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Longest string challenge	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Metaprogramming	①	②	③	④	⑤	⑥	⑦	⑧		⑩
46	Pascal matrix generation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Search a list of records	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Stable marriage problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
46	Stern-Brocot sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Base64 decode data	①	②	③	④	⑤	⑥	⑦	⑧	⑨
45	Determinant and permanent	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Determine if a string has all the same characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	History variables	①	②	③	④	⑤	⑥	⑦		⑨	⑩
45	Hofstadter Figure-Figure sequences	①	②	③	④	⑤	⑥		⑧	⑨	⑩
45	Image noise	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Naming conventions	①	②	③	④	⑤	⑥	⑦	⑧		⑩
45	Password generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Pig the dice game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
45	Send an unknown method call	①	②	③	④	⑤	⑥	⑦		⑨	⑩
45	Set consolidation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Average loop length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Carmichael 3 strong pseudoprimes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Chaos game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Execute a Markov algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Last letter-first letter	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Longest common substring	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	OpenGL	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Perfect shuffle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Polynomial long division	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Rosetta Code/Count examples	①	②	③	④	⑤	⑥			⑨	⑩
44	Sattolo cycle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
44	Sparkline in unicode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Active object	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Bitmap/Read a PPM file	①	②	③	④	⑤	⑥	⑦	⑧		⑩
43	Doubly-linked list/Definition	①	②	③	④	⑤		⑦	⑧	⑨	⑩
43	Narcissist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Parsing/Shunting-yard algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Sort numbers lexicographically	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Sorting algorithms/Radix sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Verify distribution uniformity/Naive	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
43	Visualize a tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Atomic updates	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Bulls and cows/Player	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Cantor set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Digital root/Multiplicative digital root	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Element-wise operations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Generate Chess960 starting position	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Keyboard input/Flush the keyboard buffer	①	②	③	④	⑤	⑥	⑦	⑧		⑩
42	Kronecker product	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Percentage difference between images	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	RPG attributes generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
42	Ulam spiral (for primes)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Aliquot sequence classifications	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Calendar - for "REAL" programmers	①	②	③	④		⑥	⑦	⑧		⑩
41	Elementary cellular automaton	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Hickerson series of almost integers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Knapsack problem/Bounded	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	MD5/Implementation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	McNuggets problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Nim Game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Secure temporary file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Spinning rod animation/Text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Start from a main routine	①	②	③	④		⑥	⑦	⑧		⑩
41	Sum to 100	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
41	Table creation/Postal addresses	①	②	③	④		⑥	⑦	⑧		⑩
41	Terminal control/Dimensions	①	②	③	④	⑤	⑥	⑦	⑧		⑩
41	Twelve statements	①	②	③	④	⑤	⑥	⑦		⑨	⑩
41	Variable size/Set	①	②	③	④	⑤	⑥	⑦	⑧		⑩
41	Voronoi diagram	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Determine if a string is collapsible	①	②	③	④	⑤	⑥	⑦	⑧	⑨
40	Fusc sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	GUI/Maximum window dimensions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Hilbert curve	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Kernighans large earthquake problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Pascal's triangle/Puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Problem of Apollonius	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Sorting algorithms/Strand sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Speech synthesis	①	②	③	④	⑤	⑥	⑦	⑧		⑩
40	Subtractive generator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Text between	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Van Eck sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
40	Water collected between towers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Associative array/Merging	①	②	③	④	⑤	⑥	⑦		⑨	⑩
39	Balanced ternary	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Brace expansion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Color of a screen pixel	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Combinations and permutations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Determine if a string has all unique characters	①	②	③	④	⑤	⑥	⑦	⑧	⑨
39	GUI enabling/disabling of controls	①	②	③	④	⑤		⑦	⑧	⑨	⑩
39	Inverted index	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Parametric polymorphism	①	②	③	④			⑦	⑧	⑨	⑩
39	Permutations/Derangements	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	S-expressions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Topswops	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	UTF-8 encode and decode	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
39	Variable-length quantity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Break OO privacy	①	②	③	④	⑤	⑥	⑦		⑨
38	Casting out nines	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Colour pinstripe/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Constrained genericity	①	②	③	④			⑦		⑨	⑩
38	Copy stdin to stdout	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Deepcopy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Julia set	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	LU decomposition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Parallel calculations	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Prime conspiracy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Sorting Algorithms/Circle Sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
38	Taxicab numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Bitmap/Midpoint circle algorithm	①	②	③	④	⑤		⑦			⑩
37	Chowla numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Currency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Euler's identity	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Fivenum	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Flipping bits game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Knuth's algorithm S	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Magic 8-ball	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Magic squares of doubly even order	①	②	③	④	⑤	⑥	⑦	⑧	⑨
37	Parsing/RPN to infix conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Permutations by swapping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Primorial numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Pythagorean quadruples	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	QR decomposition	①	②	③	④	⑤	⑥		⑧	⑨	⑩
37	Ray-casting algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sailors, coconuts and a monkey problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Sort a list of object identifiers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Statistics/Normal distribution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Summarize and say sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
37	Terminal control/Inverse video	①	②	③	④	⑤	⑥	⑦	⑧		⑩
37	Vampire number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Abbreviations, automatic	①	②	③	④	⑤	⑥	⑦	⑧	⑨
36	Bell numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
36	Create a file on magnetic tape	①	②	③	④	⑤		⑦	⑧	⑨	⑩
36	File extension is in extensions list	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Find palindromic numbers in both binary and ternary bases	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Function prototype	①	②	③	④		⑥	⑦	⑧		⑩
36	MAC Vendor Lookup	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Object serialization	①	②	③	④	⑤	⑥	⑦		⑨	⑩
36	Order disjoint list items	①	②	③	④	⑤	⑥	⑦		⑨	⑩
36	Permutation test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Scope/Function names and labels	①	②	③	④	⑤	⑥	⑦	⑧		⑩
36	Square but not cube	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
36	Terminal control/Hiding the cursor	①	②	③	④	⑤	⑥	⑦	⑧		⑩
35	21 game	①	②	③	④	⑤	⑥		⑧	⑨	⑩
35	Bitmap/Bézier curves/Cubic	①	②	③	④	⑤		⑦	⑧		⑩
35	Bitwise IO	①	②	③	④	⑤	⑥	⑦	⑧		⑩
35	Cramer's rule	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Days between dates	①	②	③	④	⑤	⑥	⑦	⑧	⑨
35	Events	①	②	③	④	⑤	⑥		⑧		⑩
35	Feigenbaum constant calculation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Floyd-Warshall algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Gapful numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
35	ISBN13 check digit	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Input/Output for lines of text	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Input/Output for pairs of numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Lychrel numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
35	MD4	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Metered concurrency	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Minesweeper game	①	②	③	④	⑤	⑥		⑧	⑨	⑩
35	Multiline shebang	①	②	③	④	⑤	⑥		⑧		⑩
35	Musical scale	①	②	③	④	⑤	⑥	⑦	⑧		⑩
35	Numerical integration/Gauss-Legendre Quadrature	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Pathological floating point problems	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Permutations with repetitions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Pinstripe/Display	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Solve the no connection puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Substitution cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
35	Terminal control/Unicode output	①	②	③	④	⑤	⑥	⑦	⑧		⑩
35	The Name Game	①	②	③	④	⑤	⑥	⑦	⑧	⑨
34	Arithmetic-geometric mean/Calculate Pi	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Cuban primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Fibonacci word/fractal	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Kahan summation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Largest number divisible by its digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨
34	Maze solving	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Penney's game	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Read a file character by character/UTF8	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Sutherland-Hodgman polygon clipping	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
34	Test integerness	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Check output device is a terminal	①	②	③	④	⑤	⑥	⑦	⑧		⑩
33	Display a linear combination	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Egyptian fractions	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Entropy/Narcissist	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Executable library	①	②	③	④	⑤	⑥		⑧	⑨	⑩
33	Find the intersection of a line with a plane	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Integer roots	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Parametrized SQL statement	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Parse command-line arguments	①	②	③	④	⑤	⑥	⑦	⑧		⑩
33	RIPEMD-160	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Rosetta Code/Find bare lang tags	①	②	③	④	⑤	⑥		⑧		⑩
33	Square-free integers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Topic variable	①	②	③	④	⑤	⑥	⑦			⑩
33	Totient function	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
33	Truth table	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Abbreviations, easy	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Approximate equality	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Bitcoin/address validation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Bitmap/Bézier curves/Quadratic	①	②	③	④	⑤		⑦	⑧		⑩
32	Brazilian numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
32	Cheryl's birthday	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Conjugate transpose	①	②	③	④	⑤	⑥	⑦	⑧		⑩
32	Convex hull	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Determine if a string is squeezable	①	②	③	④	⑤	⑥	⑦	⑧	⑨
32	Humble numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Mutex	①	②	③	④	⑤	⑥		⑧	⑨	⑩
32	Ordered partitions	①	②	③	④	⑤	⑥	⑦	⑧		⑩
32	Pentagram	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Pythagoras tree	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Ranking methods	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Recaman's sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨
32	Sorting algorithms/Patience sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	Subset sum problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
32	URL parser	①	②	③	④	⑤	⑥	⑦		⑨	⑩
31	Abbreviations, simple	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Bitmap/Histogram	①	②	③	④	⑤		⑦	⑧	⑨	⑩
31	Decimal floating point number to binary	①	②	③	④	⑤	⑥	⑦		⑨	⑩
31	Execute SNUSP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Galton box animation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Long primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Loops/With multiple ranges	①	②	③	④	⑤	⑥	⑦	⑧	⑨
31	Loops/Wrong ranges	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Multiple regression	①	②	③	④	⑤	⑥	⑦	⑧		⑩
31	Multiplicative order	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Negative base numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Numeric error propagation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Pattern matching	①	②	③	④		⑥	⑦			⑩
31	RSA code	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Resistor mesh	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Set puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Straddling checkerboard	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Terminal control/Cursor movement	①	②	③	④	⑤	⑥	⑦	⑧		⑩
31	Textonyms	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
31	Write to Windows event log	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Apply a digital filter (direct form II transposed)	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Check Machin-like formulas	①	②	③	④	⑤	⑥	⑦		⑨	⑩
30	Check input device is a terminal	①	②	③	④	⑤	⑥	⑦	⑧		⑩
30	Continued fraction/Arithmetic/Construct from rational number	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Cycle detection	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Determine if two triangles overlap	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	First class environments	①	②	③	④	⑤	⑥	⑦	⑧		⑩
30	Implicit type conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Keyboard macros	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Koch curve	①	②	③	④	⑤	⑥	⑦	⑧		⑩
30	Mersenne primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
30	Metronome	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Multi-dimensional array	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Partition an integer x into n primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Poker hand analyser	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Reflection/List properties	①	②	③	④	⑤	⑥	⑦		⑨
30	Simple database	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
30	Solve a Hidato puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Chat server	①		③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Checkpoint synchronization	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Factorions	①	②	③	④	⑤	⑥		⑧	⑨	⑩
29	Faulhaber's triangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Idiomatically determine all the lowercase and uppercase letters	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Memory layout of a data structure	①	②	③	④	⑤	⑥	⑦			⑩
29	Palindrome dates	①	②	③	④	⑤	⑥		⑧	⑨
29	Parallel brute force	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Perfect totient numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Remove vowels from a string	①	②	③	④	⑤	⑥	⑦	⑧	⑨
29	Terminal control/Preserve screen	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Use another language to call a function	①	②		④	⑤		⑦	⑧	⑨	⑩
29	Window creation/X11	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
29	Zhang-Suen thinning algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Arena storage pool	①	②	③	④	⑤		⑦	⑧		⑩
28	Bacon cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Chaocipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	Church numerals	①	②	③	④	⑤	⑥			⑨	⑩
28	Compiler/lexical analyzer	①	②	③	④	⑤	⑥		⑧	⑨	⑩
28	Death Star	①	②	③	④	⑤	⑥		⑧	⑨	⑩
28	Deconvolution/1D	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Eban numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	FTP	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Faulhaber's formula	①	②	③	④		⑥	⑦	⑧	⑨	⑩
28	HTTPS/Authenticated	①	②	③	④	⑤	⑥	⑦	⑧		⑩
28	Modular arithmetic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Old Russian measure of length	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Pragmatic directives	①	②	③	④	⑤	⑥	⑦	⑧		⑩
28	Rosetta Code/Find unimplemented tasks	①	②	③	④		⑥				⑩
28	Safe primes and unsafe primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	Sequence: smallest number greater than previous term with exactly n divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	Sequence: smallest number with exactly n divisors	①	②	③	④	⑤	⑥	⑦	⑧	⑨
28	Set of real numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
28	Word break problem	①	②	③	④	⑤	⑥	⑦		⑨	⑩
28	Xiaolin Wu's line algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	AVL tree	①	②	③	④	⑤		⑦	⑧	⑨
27	Active Directory/Connect	①	②		④	⑤	⑥	⑦	⑧	⑨	⑩
27	Burrows–Wheeler transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Decision tables	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Dice game probabilities	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Find first and last set bit of a long integer	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Formal power series	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Four is magic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Honeycombs	①	②	③		⑤	⑥	⑦	⑧	⑨	⑩
27	Jacobi symbol	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Lah numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Mian-Chowla sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨
27	Paraffins	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Rosetta Code/Fix code tags	①	②	③	④	⑤	⑥			⑨	⑩
27	Safe addition	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Sorting algorithms/Cycle sort	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	State name puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Sum and product puzzle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Superellipse	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Update a configuration file	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Verify distribution uniformity/Chi-squared test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
27	Weird numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Bioinformatics/base count	①	②	③	④	⑤	⑥		⑧	⑨	⑩
26	Chebyshev coefficients	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Chemical calculator	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Distributed programming	①		③	④	⑤	⑥		⑧		⑩
26	Diversity prediction theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨
26	Find largest left truncatable prime in a given base	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Go Fish	①	②	③	④	⑤		⑦	⑧	⑨	⑩
26	Natural sorting	①	②	③	④	⑤	⑥	⑦	⑧		⑩
26	Nautical bell	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Polyspiral	①	②	③	④	⑤		⑦	⑧	⑨	⑩
26	Ramsey's theorem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Reflection/List methods	①	②	③	④	⑤	⑥	⑦		⑨
26	Same fringe	①	②	③	④	⑤	⑥		⑧	⑨	⑩
26	Strong and weak primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
26	Table creation	①	②	③	④	⑤			⑧		⑩
26	Thiele's interpolation formula	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
26	Yellowstone sequence	①	②	③	④	⑤	⑥	⑦		⑨	⑩
25	Angles (geometric), normalization and conversion	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Birthday problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Card shuffles	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Create an object at a given address	①	②	③	④			⑦	⑧		⑩
25	Cut a rectangle	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Draw a rotating cube	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Fairshare between two and more	①	②	③	④	⑤	⑥	⑦	⑧	⑨
25	Fraction reduction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Image convolution	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Law of cosines - triples	①	②	③	④	⑤	⑥	⑦	⑧	⑨
25	N-smooth numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
25	RCRPG	①	②	③	④	⑤	⑥		⑧	⑨	⑩
25	Sequence of primorial primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Smarandache prime-digital sequence	①	②	③	④	⑤	⑥		⑧	⑨
25	Super-d numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
25	The ISAAC Cipher	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
25	Type detection	①	②	③	④		⑥	⑦	⑧		⑩
24	Color wheel	①	②	③	④	⑤	⑥	⑦		⑨	⑩
24	First power of 2 that has leading decimal digits of 12	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	K-means++ clustering	①	②	③	④	⑤		⑦	⑧	⑨	⑩
24	Kronecker product based fractals	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Peano curve	①	②	③	④	⑤	⑥		⑧	⑨	⑩
24	Pell's equation	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Perlin noise	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Plasma effect	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Play recorded sounds	①	②	③		⑤					⑩
24	Ramer-Douglas-Peucker line simplification	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Range consolidation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Sexy primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Sierpinski pentagon	①		③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Simulate input/Keyboard	①			④	⑤	⑥	⑦	⑧	⑨	⑩
24	Solve a Holy Knight's tour	①	②	③	④	⑤	⑥	⑦		⑨	⑩
24	Stirling numbers of the second kind	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Successive prime differences	①	②	③	④	⑤	⑥	⑦	⑧	⑨
24	Welch's t-test	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
24	Yahoo! search interface	①			④	⑤	⑥	⑦		⑨	⑩
23	A* search algorithm	①	②	③	④	⑤		⑦	⑧	⑨	⑩
23	Fermat numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	First perfect square in base n with n unique digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Generate random chess position	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Hough transform	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	Length of an arc between two angles	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Machine code	①	②	③	④	⑤		⑦	⑧		⑩
23	Magic squares of singly even order	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Main step of GOST 28147-89	①	②	③	④	⑤	⑥	⑦	⑧		⑩
23	Make a backup file	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Markov chain text generator	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Minimum positive multiple in base 10 using only 0 and 1	①	②	③	④		⑥	⑦	⑧	⑨
23	Monads/Maybe monad	①	②	③	④		⑥	⑦			⑩
23	Primality by Wilson's theorem	①	②	③	④	⑤	⑥		⑧	⑨
23	Record sound	①	②	③	④	⑤		⑦	⑧		⑩
23	SOAP	①	②	③	④	⑤	⑥	⑦	⑧
23	Stirling numbers of the first kind	①	②	③	④	⑤	⑥	⑦	⑧	⑨
23	Stream merge	①	②	③	④		⑥	⑦	⑧	⑨	⑩
23	Teacup rim text	①	②	③	④	⑤	⑥		⑧	⑨
23	Unprimeable numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
23	World Cup group stage	①	②	③	④	⑤	⑥	⑦		⑨	⑩
23	Zumkeller numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Audio alarm	①	②	③		⑤		⑦		⑨	⑩
22	Base58Check encoding	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Cipolla's algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Circular primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
22	Create an object/Native demonstration	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Deming's Funnel	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Function frequency	①	②	③	④	⑤	⑥		⑧		⑩
22	Idiomatically determine all the characters that can be used for symbols	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Linux CPU utilization	①	②	③	④	⑤	⑥	⑦	⑧		⑩
22	Lucky and even lucky numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
22	Mind boggling card trick	①	②	③	④	⑤	⑥	⑦	⑧
22	Nonoblock	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Parse an IP Address	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Percolation/Mean run density	①	②	③	④	⑤	⑥	⑦	⑧		⑩
22	Permutations/Rank of a permutation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Reverse the gender of a string	①	②	③	④	⑤	⑥	⑦		⑨	⑩
22	Spelling of ordinal numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
22	Superpermutation minimisation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Tonelli-Shanks algorithm	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Total circles area	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
22	Video display modes	①	②	③	④	⑤	⑥	⑦
21	Abelian sandpile model	①	②	③	④	⑤	⑥		⑧	⑨
21	Active Directory/Search for a user	①	②		④	⑤			⑧	⑨
21	Commatizing numbers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
21	Elementary cellular automaton/Random Number Generator	①	②	③	④	⑤	⑥	⑦	⑧		⑩
21	Elliptic curve arithmetic	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
21	Fixed length records	①	②	③	④	⑤	⑥
21	Intersecting number wheels	①	②	③	④	⑤	⑥	⑦	⑧	⑨
21	Joystick position	①	②	③	④	⑤
21	Palindromic gapful numbers	①	②	③	④	⑤			⑧	⑨
21	Pig the dice game/Player	①	②	③	④	⑤	⑥			⑨	⑩
21	Playfair cipher	①	②	③	④	⑤	⑥	⑦		⑨
21	Sorting algorithms/Cocktail sort with shifting bounds	①	②	③	④	⑤	⑥		⑧	⑨
21	Window management	①	②	③	④	⑤	⑥		⑧	⑨	⑩
20	Addition chains	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Data Encryption Standard	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	De Bruijn sequences	①	②	③	④	⑤	⑥	⑦		⑨	⑩
20	Find duplicate files	①	②	③	④	⑤	⑥			⑨	⑩
20	Gauss-Jordan matrix inversion	①	②	③	④		⑥	⑦		⑨	⑩
20	Kolakoski sequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Magnanimous numbers	①	②	③	④		⑥		⑧	⑨
20	Mastermind	①	②	③	④	⑤	⑥	⑦
20	Median filter	①	②	③	④	⑤	⑥	⑦	⑧		⑩
20	Möbius function	①	②	③	④		⑥	⑦	⑧	⑨
20	Native shebang	①	②	③	④	⑤	⑥		⑧		⑩
20	Next highest int from digits	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Numeric separator syntax	①	②	③	④	⑤	⑥		⑧	⑨	⑩
20	Orbital elements	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Pierpont primes	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Random Latin squares	①	②	③	④	⑤	⑥	⑦	⑧	⑨
20	Reflection/Get source	①	②	③	④	⑤		⑦		⑨
20	Shortest common supersequence	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Snake and Ladder	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Sokoban	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
20	Solve a Hopido puzzle	①	②	③	④	⑤	⑥	⑦		⑨	⑩
20	Solve a Numbrix puzzle	①	②		④	⑤	⑥	⑦		⑨	⑩
19	Bilinear interpolation	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Bioinformatics/Sequence mutation	①	②	③	④	⑤	⑥		⑧	⑨	⑩
19	Color quantization	①	②	③	④	⑤	⑥	⑦	⑧		⑩
19	Finite state machine	①	②	③	④	⑤		⑦	⑧	⑨	⑩
19	Hunt the Wumpus	①	②	③	④	⑤				⑨	⑩
19	Isqrt (integer square root) of X	①	②	③	④		⑥
19	Monads/List monad	①	②	③	④		⑥	⑦			⑩
19	N-body problem	①	②	③	④	⑤	⑥	⑦	⑧	⑨
19	Readline interface	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
19	Simulate input/Mouse	①		③	④	⑤		⑦	⑧	⑨	⑩
19	Sunflower fractal	①	②	③	④	⑤	⑥		⑧		⑩
18	Arithmetic coding/As a generalized change of radix	①	②	③	④	⑤	⑥	⑦		⑨
18	Assertions in design by contract	①	②	③	④			⑦		⑨	⑩
18	Code segment unload	①	②	③	④	⑤	⑥	⑦		⑨	⑩
18	Eertree	①	②	③	④	⑤	⑥	⑦		⑨	⑩
18	Esthetic numbers	①	②	③	④		⑥	⑦	⑧	⑨
18	Find URI in text	①	②	③	④		⑥	⑦			⑩
18	Index finite lists of positive integers	①	②	③	④	⑤	⑥	⑦		⑨	⑩
18	K-d tree	①	②	③	④	⑤		⑦	⑧	⑨	⑩
18	Knuth's power tree	①	②	③	④	⑤	⑥	⑦		⑨	⑩
18	Monads/Writer monad	①	②	③	④		⑥	⑦
18	Names to numbers	①	②	③	④	⑤	⑥	⑦			⑩
18	Perceptron	①	②	③		⑤		⑦		⑨	⑩
18	Print debugging statement	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	SQL-based authentication	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	Selective file copy	①	②	③	④		⑥	⑦		⑨	⑩
18	Sierpinski arrowhead curve	①	②	③	④		⑥		⑧
18	Sum data type	①	②	③	④		⑥		⑧	⑨
18	Untrusted environment	①	②		④		⑥	⑦	⑧		⑩
18	Vigenère cipher/Cryptanalysis	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
18	Vogel's approximation method	①	②	③	④	⑤		⑦	⑧	⑨	⑩
17	Bitcoin/public point to address	①	②	③	④	⑤	⑥		⑧		⑩
17	Compiler/code generator	①	②	③	④	⑤	⑥		⑧	⑨
17	Draw pixel 2	①	②	③	④		⑥	⑦	⑧		⑩
17	EKG sequence convergence	①	②	③	④	⑤	⑥	⑦	⑧	⑨
17	Elementary cellular automaton/Infinite length	①	②	③	④	⑤	⑥	⑦			⑩
17	Just in time processing on a character stream	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Kosaraju	①	②	③	④	⑤	⑥	⑦		⑨	⑩
17	Levenshtein distance/Alignment	①	②	③	④		⑥	⑦	⑧	⑨	⑩
17	List rooted trees	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Longest common suffix	①	②	③	④	⑤	⑥
17	Mertens function	①	②	③	④		⑥		⑧	⑨
17	Metallic ratios	①	②	③	④	⑤	⑥	⑦		⑨
17	Montgomery reduction	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Numbers with equal rises and falls	①	②	③	④	⑤			⑧
17	Numbers with prime digits whose sum is 13	①	②	③	④
17	P-value correction	①	②	③	④	⑤	⑥	⑦	⑧	⑨
17	Percolation/Site percolation	①	②	③	④	⑤	⑥	⑦	⑧		⑩
17	Primes - allocate descendants to their ancestors	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
17	Proof	①	②		④						⑩
17	Separate the house number from the street name	①	②	③	④	⑤	⑥	⑦			⑩
17	Solve triangle solitare puzzle	①	②	③	④	⑤	⑥	⑦		⑨	⑩
17	Zeckendorf arithmetic	①	②	③	④	⑤		⑦	⑧	⑨	⑩
16	Aspect oriented programming	①	②	③	④	⑤	⑥	⑦	⑧	⑨
16	Bitmap/Read an image through a pipe	①		③	④	⑤		⑦	⑧		⑩
16	Compiler/syntax analyzer	①	②	③		⑤	⑥		⑧	⑨
16	Compiler/virtual machine interpreter	①	②	③	④	⑤	⑥		⑧
16	File size distribution	①	②	③	④	⑤	⑥	⑦	⑧		⑩
16	HTTPS/Client-authenticated	①	②	③	④	⑤	⑥	⑦			⑩
16	Imaginary base numbers	①	②	③	④	⑤	⑥	⑦	⑧	⑨
16	Increasing gaps between consecutive Niven numbers	①	②	③	④		⑥		⑧	⑨
16	Most frequent k chars distance	①	②		④	⑤	⑥	⑦		⑨	⑩
16	NYSIIS	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Particle swarm optimization	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Polynomial synthetic division	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Self-hosting compiler	①	②		④	⑤		⑦
16	Terminal control/Positional read	①	②	③	④	⑤	⑥	⑦	⑧		⑩
16	Twin primes	①	②	③	④		⑥	⑦	⑧	⑨
16	UPC	①	②	③	④		⑥	⑦	⑧
16	Word search	①	②	③	④	⑤	⑥	⑦		⑨	⑩
16	Word wheel	①	②	③	④	⑤	⑥		⑧
15	15 puzzle solver	①	②	③		⑤					⑩
15	ASCII art diagram converter	①	②	③	④	⑤	⑥			⑨	⑩
15	Canonicalize CIDR	①	②	③	④	⑤	⑥		⑧
15	Free polyominoes enumeration	①	②	③		⑤		⑦		⑨	⑩
15	Geometric algebra	①	②	③	④	⑤		⑦		⑨
15	Line circle intersection	①	②	③	④		⑥	⑦	⑧	⑨
15	Matrix chain multiplication	①	②	③	④		⑥	⑦	⑧	⑨
15	Matrix digital rain	①	②	③	④	⑤	⑥		⑧		⑩
15	Mayan numerals	①	②	③	④	⑤	⑥			⑨
15	Nested templated data	①	②	③	④	⑤	⑥				⑩
15	Nonogram solver	①	②	③		⑤	⑥	⑦		⑨	⑩
15	Percolation/Bond percolation	①	②	③	④	⑤	⑥	⑦	⑧		⑩
15	Percolation/Mean cluster density	①	②	③	④	⑤	⑥	⑦	⑧		⑩
15	Rendezvous	①	②	③	④				⑧		⑩
15	Retrieve and search chat history	①	②	③	④				⑧		⑩
15	Snake	①	②	③	④		⑥	⑦	⑧	⑨
15	Suffix tree	①	②	③	④	⑤	⑥	⑦		⑨	⑩
15	Transportation problem	①	②	③	④			⑦		⑨	⑩
14	Bitmap/PPM conversion through a pipe	①		③	④	⑤		⑦	⑧		⑩
14	Chernick's Carmichael numbers	①	②	③	④		⑥		⑧	⑨
14	Gradient descent	①	②	③	④		⑥				⑩
14	Latin Squares in reduced form	①	②	③	④	⑤		⑦		⑨
14	Logistic curve fitting in epidemiology	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Numerical integration/Adaptive Simpson's method	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Peaceful chess queen armies	①	②	③	④	⑤	⑥	⑦	⑧	⑨
14	Permutations with some identical elements	①	②	③	④		⑥
14	Rare numbers	①	②	③				⑦		⑨
14	Singly-linked list/Element removal	①	②	③	④	⑤		⑦	⑧		⑩
14	Tarjan	①	②	③	④	⑤	⑥	⑦			⑩
14	Vibrating rectangles	①	②	③	④	⑤	⑥		⑧		⑩
14	XML validation	①		③	④	⑤	⑥	⑦	⑧	⑨
13	Compare sorting algorithms' performance	①	②	③		⑤		⑦	⑧
13	Compiler/AST interpreter	①	②	③		⑤	⑥		⑧	⑨
13	Cyclotomic polynomial	①	②	③	④	⑤	⑥	⑦		⑨
13	Four is the number of letters in the ...	①	②	③	④	⑤	⑥	⑦	⑧	⑨
13	Functional coverage tree	①	②	③	④	⑤	⑥	⑦			⑩
13	Generalised floating point addition	①	②	③	④		⑥	⑦		⑨	⑩
13	Jaro-Winkler distance	①	②	③	④	⑤	⑥
13	Sequence: nth number with exactly n divisors	①	②	③	④	⑤	⑥	⑦		⑨
13	Sine wave	①	②	③	④		⑥	⑦			⑩
13	Topological sort/Extracted top item	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩
12	Abelian sandpile model/Identity	①	②	③	④	⑤
12	Banker's algorithm	①	②	③	④		⑥	⑦	⑧		⑩
12	Biorhythms	①	②	③	④		⑥
12	Canny edge detector	①	②	③		⑤			⑧
12	Continued fraction/Arithmetic/G(matrix ng, continued fraction n)	①	②	③	④	⑤		⑦			⑩
12	Deconvolution/2D+	①	②	③	④	⑤	⑥		⑧
12	Nimber arithmetic	①	②	③	④				⑧	⑨
12	OpenWebNet password	①	②	③	④	⑤	⑥	⑦			⑩
12	Pisano period	①	②	③	④	⑤	⑥			⑨
12	Print itself	①	②	③	④	⑤	⑥
12	Pseudo-random numbers/Splitmix64	①	②	③	④	⑤			⑧
12	Ramanujan's constant	①	②	③	④	⑤	⑥			⑨
12	Safe mode	①	②		④		⑥
12	Self numbers	①	②	③					⑧
12	Sierpinski curve	①	②	③	④		⑥			⑨
12	Simulated annealing	①	②	③	④		⑥				⑩
11	Factorial base numbers indexing permutations of a collection	①	②	③	④	⑤	⑥
11	Geohash	①	②	③	④	⑤	⑥
11	Getting the number of decimals	①	②	③	④	⑤	⑥			⑨
11	Greed	①	②	③	④			⑦		⑨
11	Interactive help	①	②	③	④		⑥				⑩
11	Long literals, with continuations	①	②	③	④	⑤
11	Pseudo-random numbers/PCG32	①	②	③	④	⑤
11	Sierpinski square curve	①	②	③	④		⑥			⑨
11	Sorting algorithms/Tree sort on a linked list	①	②	③				⑦	⑧	⑨	⑩
11	Tetris	①	②	③		⑤				⑨
11	Text completion	①	②	③	④		⑥			⑨
11	VList	①	②		④			⑦	⑧		⑩
10	Almkvist-Giullera formula for pi	①	②	③	④	⑤
10	Audio frequency generator	①	②	③			⑥
10	Catmull–Clark subdivision surface	①		③		⑤			⑧
10	Colour pinstripe/Printer	①	②	③	④	⑤					⑩
10	Execute CopyPasta Language	①	②	③	④	⑤	⑥			⑨
10	Exponentiation with infix operators in (or operating on) the base	①	②	③	④	⑤
10	External sort	①	②	③	④	⑤	⑥
10	Longest palindromic substrings	①	②	③	④	⑤
10	One-time pad	①	②	③	④	⑤	⑥	⑦		⑨	⑩
10	Penrose tiling	①	②	③	④		⑥	⑦		⑨	⑩
10	Pentomino tiling	①	②	③	④			⑦		⑨	⑩
10	Pseudo-random numbers/Xorshift star	①	②	③	④	⑤
10	Railway circuit	①	②	③	④			⑦		⑨	⑩
10	Resistance calculator	①	②	③	④	⑤	⑥
10	Run as a daemon or service	①			④	⑤			⑧		⑩
10	Spoof game	①	②	③	④		⑥	⑦	⑧
10	Square root by hand	①	②	③	④
10	Time-based one-time password algorithm	①		③	④		⑥				⑩
10	Using a speech engine to highlight words	①	②		④
9	Checksumcolor	①	②	③	④		⑥
9	Combinations with repetitions/Square digit chain	①	②	③	④		⑥	⑦
9	Curve that touches three points	①	②	③	④		⑥
9	Faces from a mesh	①	②	③	④	⑤	⑥
9	Fibonacci matrix-exponentiation	①	②	③	④		⑥			⑨
9	French Republican calendar	①	②	③	④		⑥	⑦
9	IPC via named pipe	①			④		⑥		⑧		⑩
9	Launch rocket with countdown and acceleration in stdout	①	②	③	④		⑥				⑩
9	Morpion solitaire	①	②	③					⑧	⑨	⑩
9	Parse EBNF	①	②		④		⑥
9	Pinstripe/Printer	①	②	③	④						⑩
9	Starting a web browser	①	②	③	④		⑥				⑩
9	Suffixation of decimal numbers	①	②	③	④	⑤	⑥
9	Three word location	①	②	③	④		⑥		⑧
9	Unit testing	①	②	③	④						⑩
9	XXXX redacted	①	②	③	④		⑥
8	Display an outline as a nested table	①	②	③	④	⑤	⑥
8	Minimal steps down to 1	①	②	③	④	⑤				⑨
8	Non-transitive dice	①	②	③		⑤
8	Numerical and alphabetical suffixes	①	②	③	④	⑤
8	Partition function P	①	②	③	④	⑤
8	Powerful numbers	①	②	③	④		⑥			⑨
8	Quoting constructs	①	②	③	④
8	Resistance network calculator	①	②	③	④	⑤	⑥
8	Rosetta Code/Tasks without examples	①	②		④		⑥	⑦		⑨
8	Text to HTML	①	②		④		⑥				⑩
8	Tree datastructures	①	②	③	④	⑤	⑥
8	User defined pipe and redirection operators	①	②		④		⑥				⑩
7	16 puzzle game	①	②	③			⑥
7	Compiler/Verifying syntax	①	②	③	④		⑥		⑧
7	Elliptic Curve Digital Signature Algorithm	①	②	③	④		⑥		⑧
7	Fibonacci heap	①	②	③	④	⑤		⑦
7	Graph colouring	①	②	③	④	⑤					⑩
7	Multidimensional Newton-Raphson method	①	②	③	④			⑦
7	Pancake numbers	①	②	③					⑧
7	Pseudo-random numbers/Combined recursive generator MRG32k3a	①	②	③	④	⑤
7	Pseudorandom number generator image	①		③	④		⑥			⑨
7	Range modifications	①	②	③	④	⑤
7	Robots	①	②	③	④			⑦		⑨
7	Rosetta Code/Rank languages by number of users	①	②		④		⑥				⑩
7	Sort an outline at every level	①	②	③		⑤
7	URL shortener	①		③	④	⑤
6	Brace expansion using ranges	①	②	③	④
6	Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)	①	②		④			⑦
6	Mayan calendar	①	②	③	④		⑥
6	OpenGL pixel shader	①						⑦	⑧		⑩
6	OpenGL/Utah Teapot	①	②					⑦	⑧
6	Recursive descent parser generator	①	②	③	④
6	Rosetta Code/Run examples	①			④
6	SHA-256 Merkle tree	①	②	③	④	⑤
5	Addition-chain exponentiation	①	②						⑧		⑩
5	Audio overlap loop	①		③
5	Black Box	①	②	③
5	Boids	①	②	③					⑧	⑨
5	Cistercian numerals		②		④	⑤
5	Hexapawn	①	②	③
5	Process SMIL directives in XML data	①	②		④		⑥
5	Raster bars	①	②	③	④
5	Remote agent/Agent interface	①		③					⑧
5	Remote agent/Agent logic	①		③					⑧
5	Remote agent/Simulation	①		③					⑧
5	Solve a Rubik's Cube	①	②	③				⑦
5	Terminal control/Restricted width positional input/No wrapping	①	②		④			⑦
5	Terminal control/Restricted width positional input/With wrapping	①	②		④			⑦
5	Waveform analysis/Doh ray me	①	②	③	④		⑥
4	Chess player	①	②			⑤
4	Doubly-linked list/Element removal		②	③	④
4	Generalised floating point multiplication	①	②	③
4	I'm a software engineer, get me out of here	①	②	③
4	OLE automation	①				⑤
4	Strassen's algorithm	①	②	③
4	Tamagotchi emulator	①
4	Unicode polynomial equation	①	②	③
4	Using the Meetup.com API	①				⑤				⑨
4	Weather routing	①	②	③
3	Latin Squares in reduced form/Randomizing using Jacobson and Matthews’ Technique	①	②
3	Rosetta Code/List authors of task descriptions	①	②		④
3	Solving coin problems	①	②				⑥
3	Ukkonen’s suffix tree construction	①	②	③
3	Vidir		②		④
3	Waveform analysis/Top and tail	①	②	③
2	15 puzzle game in 3D	①
2	CLI-based maze-game		②
2	IRC gateway	①
1	Blackjack strategy	①
1	Smallest enclosing circle problem			③