Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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Used for challenges where answers make reference to themselves or their characteristics, such as length or character values.
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For challenges relating to the encoding and decoding of data.
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scored on some metric of their output.
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related to crossword puzzles.
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Challenge related to the concept of trees present in graph theory.
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Used for challenges that require user interaction during their runtime
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For challenges relating to approximating constants/other numbers.
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related to the Brain-flak esoteric language and languages based on Brain-Flak. Note that challenges that require the answers to be in a specific language are generally discouraged.
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For challenges related to the classic arcade game Tetris.
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specific to numbers represented in floating-point format.
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For challenges that require answers to perform network requests, etc.
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Fewest operations measures the number of specified "operations" performed at run time.
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combination puzzles that involve moving flat pieces around to achieve a target configuration. Examples are 15-game or 2048.
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For challenges related to the processing of text input.
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The puzzle or challenge involves repeated application of some transformation to the input. These puzzles often involve mathematical sequences or fractals.
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For challenges regarding fitting the most number of a certain shape into another shape, or for packing a number of a certain shape into the most compact form.
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related to the Haskell language. Note that challenges that require the answers to be in a specific language are generally discouraged.
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For challenges involving either three-dimensional graphics, three-dimensional geometry or spatial data structures in three dimensions (e.g. octrees).
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Used for challenges that consist of multiple sub-challenges ("holes"), somehow combining the scores into one score. (Note: combining multiple unrelated challenges together is off-topic)
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For challenges that involve error output, such as compiler/interpreter warnings or errors.
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exists for historical reasons. New challenges of the type previously posted under this tag are not welcome.
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indicates that the challenge involves electrical components such as resistors in some way (e.g. counting the total resistance of a set of resistors).
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For challenges related to topology the mathematical study of open sets.
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For challenges asking participants to design a language or parts of a language.
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For challenges related to Morse code.
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directly related to solving, generating, or otherwise working with the minesweeper game.
× 11
Puzzles involving a word search - a word game that consists of the letters of words placed in a grid, which usually has a rectangular or square shape. Usually, the objective of this puzzle is to find…
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Tasks involving writing compilers for various languages or formalisms.
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about or related to encoding a plaintext, usually with one or more keys.
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Challenges involving behaviour that depends on previous invocations of the solution.
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For challenges relating to the game of Boggle.
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For challenges pertaining to a formal grammar often a context free grammar.
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is used for challenges specifically related to clocks and the display of absolute time. Usually it should not be used for challenges about relative time.
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indicates that the challenge involves creating or decoding error correction - adding bytes to data to ensure that it can be read even if part of it is lost.
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an open standard key-value pair data format. Use this tag for questions that involve parsing, outputting, or otherwise manipulating JSON objects.
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For challenges involving doing something at compile-time, rather than run-time. This means that only compiled languages can compete.