A collection of UNIX utilities that solve various NP hard problems
Similar to the way grep solves search in a composable manner, these utilities should be repositories of exact and heuristic solutions to hard problems that have shell-composable line-oriented interfaces.
Currently the only utility included is a Travelling Salesman Problem solver in the tsp/ directory, but the idea is to eventually cover several popular NP-hard problems.
To compile any of these utilities:
go build name.go
Usage:
cat points.txt | tsp -nearest-neighbor
We offer a selection of exact and heuristic algorithms:
- Exact
- Brute Force (
-brute
)
- Brute Force (
- Heuristic
- Nearest Neighbor (
-nearest-neighbor
)
- Nearest Neighbor (
The result of tsp --help
:
Usage of ./tsp:
-brute=false: Brute force searcher: slow but exact
Time: O(n!) Space: O(n)
Multithreaded by default, turn off with -single-core
-nearest-neighbor=false: Nearest Neighbor heuristic: fast and approximate
Time: O(n**3) Space: O(n)
Path produced is on average 25% longer than optimal:
[Johnson, D.S. and McGeoch, L.A.. "The traveling salesman problem:
A case study in local optimization", Local search in combinatorial
optimization, 1997, 215-310]
-single-core=false: Disable multithreading
Copyright (c) 2013 thenoviceoof
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