Top new questions this week:
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Inspired by one of many bugs I ran into while implementing selection sort in trilangle. Given a non-empty list of non-negative integers, “sort” the list using the following procedure: Find …
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Imagine that a list of integers describes the heights of some two-dimensional terrain as seen from the side. Stamina: [ 4 4 4 4 4 4 3 3 3 3 2 2 2 – ] O …
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We are going to bring down an imaginary building with a series of explosions. Our building is a 5×5 matrix of integers ranging 1-9, each representing a single brick. The challenge is to set of a …
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You’re driving a car in an infinite city whose blocks are pentagons arranged in the order-4 pentagonal tiling. At each step, you proceed to the next intersection and choose whether to continue left, …
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Dedicated to Martin Gardner, taken from his book Background In the old days, the Slavs had a divination method for finding out whether a girl would get married. The girl would clutch six straws in her …
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Description Write a program or function that takes in a positive integer \$n\$ as input and outputs all Sophie Germain primes that are safe primes less than or equal to \$n\$. A prime number \$p\$ is …
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This question is an extension of Who's that Polygon? to arbitrary numbers of sides. A fundamental polygon for a surface is an polygon with a prescribed pairing for all its \$2n\$ sides, each …
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Greatest hits from previous weeks:
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Print or return the following string: zottffssentettffssenttttttttttttttttttttffffffffffffffffffffsssssssssssssssssssseeeeeeeeeennnnnnnnnno This is the first …
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NPM’s sloc is a moderately popular tool for counting source lines of code in a file. The tool will attempt to strip out both single and multiline comments and count the remaining lines in order to get …
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Challenge: In the programming language of your choice, shut down the machine that your code was executed on. Rules No shutting down by resource exhaustion (e.g.: forkbomb to force shutdown) You are …
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Introduction You’re probably familiar with zip bombs, XML bombs, etc. Put simply, they are (relatively) small files which produce enormous output when interpreted by naïve software. The challenge …
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There have been many other flag challenges posted but not one for the national flag of France. This week seems like an appropriate time. Produce this flag in the fewest bytes possible: The image must …
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Note: There is not been a vanilla parity test challenge yet (There is a C/C++ one but that disallows the ability to use languages other than C/C++, and other non-vanilla ones are mostly closed too), …
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Some sleep commands implement a delay of an integer number of seconds. However, 232 seconds is only about 100 years. Bug! What if you need a larger delay? Make a …
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Can you answer these questions?
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You are given a system with a hidden permutation of the numbers \$1, 2, 3, \ldots, n\$. Your task is to guess this permutation by asking the system a series of questions. Each question consists of …
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Languages, such as C++, have introduced a new comparison operator: <=>. This operator returns -1, 0, or 1 when comparing two items together: -1 means the …
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