exact-cover alternatives and similar packages
Based on the "Algorithms" category.
Alternatively, view exact-cover alternatives based on common mentions on social networks and blogs.
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arithmoi
Number theory: primes, arithmetic functions, modular computations, special sequences -
presburger
Decision procedures for Presburger arithmetic in Haskell -
imj-animation
Monorepo for a multi-player game engine, and game examples -
text-metrics
Calculate various string metrics efficiently in Haskell -
search-algorithms
Haskell library containing common graph search algorithms -
lca
Improves the known complexity of online lowest common ancestor search to O(log h) persistently, and without preprocessing -
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integer-logarithms
Integer logarithms, originally split from arithmoi package -
incremental-sat-solver
Simple, Incremental SAT Solving as a Haskell Library -
treeviz
Haskell library for visualizing algorithmic decomposition of computations. -
nonlinear-optimization-ad
Wrapper of nonlinear-optimization package for using with ad and backprop packages -
GraphSCC
Tarjan's algorithm for computing strongly connected components -
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infinite-search
An implementation of Martin Escardo's exhaustively searchable sets in Haskell. -
edit-distance-vector
Calculate edit scripts and distances between Vectors. -
primesieve
A collection of packages related to math, algorithms and science, in Haskell. -
adp-multi
Prototype of ADP for MCFL (multiple context-free languages) -
graph-generators
A Haskell library for creating random Data.Graph instances using several pop -
edit-distance-linear
Levenshtein edit distance in linear memory (also turns out to be faster than C++) -
epanet-haskell
Call the EPANET toolkit via Haskell's Foreign Function Interface
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Popular Comparisons
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exact-covervsGraphSCC
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README
The exact-cover package
exact-cover is a Haskell library that implements a fast solver
for exact cover problems using
Algorithm X as described in the
paper Dancing Links, by Donald Knuth, in
Millennial Perspectives in Computer Science, P159, 2000.
See exact-cover on Hackage
for more information.
Examples
You will need to set the buildExamples flag to build the executable samples.
e.g. on stack, do
stack build --flag exact-cover:buildExamples
Sudoku
After setting the buildExamples flag above, the sudoku example can be run with
stack exec sudoku
Interesting sudoku puzzles that one might use to try out the solver:
Unsolvable “puzzle” that took Peter Norvig’s solver 1439 seconds to prove that there is no solution:
.....5.8....6.1.43..........1.5........1.6...3.......553.....61........4.........Finnish mathematician Arto Inkala’s 2006 puzzle
85...24..72......9..4.........1.7..23.5...9...4...........8..7..17..........36.4...53.....8......2..7..1.5..4....53...1..7...6..32...8..6.5....9..4....3......97..A compilation of resources, which includes lists of “hardest sudokus”.