Complexity results for restricted instances of a paint shop problem

P.S. Bonsma

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We study the following problem: an instance is a word with every letter occurring twice. A solution is a 2-coloring of the letters in the word such that the two occurrences of every letter are colored with different colors. The goal is to minimize the number of color changes between adjacent letters. This is a special case of the Paint Shop Problem, which was previously shown to be $\mathcal{NP}$-hard. We show that this special case is also $\mathcal{NP}$-hard and even $\mathcal{APX}$-hard
Original languageUndefined
Place of PublicationEnschede
PublisherUniversity of Twente, Department of Applied Mathematics
Number of pages7
ISBN (Print)0169-2690
Publication statusPublished - 2003

Publication series

NameMemorandum Afdeling TW
PublisherDepartment of Applied Mathematics, University of Twente
ISSN (Print)0169-2690


  • IR-65866
  • METIS-213735
  • MSC-68R15
  • MSC-90B30
  • EWI-3501
  • MSC-68Q25

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