This repository contains the solution submitted by team J12 for the EURO/ROADEF 2012 Challange Machine Reassignment Problem proposed by Google (http://challenge.roadef.org/2012/en/index.php)

For more informations about our solution see http://www.cs.put.poznan.pl/wjaskowski/projects/roadef-challenge-2012

Wojciech Jaśkowski, Marcin Szubert & Piotr Gawron, A hybrid MIP-based large neighborhood search heuristic for solving the machine reassignment problem, Annals of Operations Research, Springer, 2015 (http://link.springer.com/article/10.1007%2Fs10479-014-1780-6)

$> ant jar

Most configuration requires CPLEX Solver (version 12.5 was used). Make sure that the system see the CPLEX binary libraries, e.g:

$> export LD_LIBRARY_PATH=/opt/ibm/ilog/cplex/bin/x86-64_sles10_4.1

Run using configuration hc_lnshc.conf:

$> java -jar build/jar/roadef.jar -conf conf/hc_lnshc.conf -p data/A/model_a1_2.txt -i data/A/assignment_a1_2.txt -o new_assignment_a1_2.txt -t 300

This code was developed under very high time pressure by people of various levels of Java tolerance. Be lenient in evaluating the code.