advent2019 | publicly released challenges from the OverTheWire Advent | Hacking library
kandi X-RAY | advent2019 Summary
kandi X-RAY | advent2019 Summary
This is the repository with challenges from the OverTheWire Advent Bonanza 2019 CTF.
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QUESTION
Given a tree, how do you generate a list of all (proper) subtrees in Clojure using higher order functions?
Background
I am working on Advent of Code 2019 Problem #6. The problem begins with an adjacency list. I have represented the adjacency list as an n-ary tree, using Clojure lists, with the following structure.
A node that is not a leaf is a list with two parts: the first part is an element representing the root of that section of the tree; the second part is a n elements representing branches from the root. Leaves are lists having a keyword as their only element. Thus, I represent a tree of the form,
...ANSWER
Answered 2020-Jun-21 at 20:10You can accomplish with the function walk-with-parents-readonly
from the Tupelo library. Here is the code:
QUESTION
I'm a haskell beginner, I use the advent of code as learning examples. When setting up for this year I reinstalled stack (on a new machine, however copied most dotfiles over) and was starting from my last years notes and was not able to get hdevtools working again.
I have set up a new project with stack new advent2019
. In case it matters stack build
on the "empty" project seems to take several minutes - seems much longer than last year. I install hdevtools with stack build hdevtools
.
When I run stack exec hdevtools -- check src/Lib.hs
I get following error:
ANSWER
Answered 2019-Dec-01 at 17:37The --no-ghc-package-path
solution should have worked. However, you can just run hdevtools
outside of Stack. On a Linux machine, if I run the following set of commands exactly:
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