Faster parameterized algorithm for pumpkin vertex deletion set

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Abstract

A directed graph G is called a pumpkin if G is a union of induced directed paths with a common start vertex s and a common end vertex t, and the internal vertices of every two paths are disjoint. We give an algorithm that given a directed graph G and an integer k, decides whether a pumpkin can be obtained from G by deleting at most k vertices. The algorithm runs in O (2 k ) time.

Original languageEnglish
Pages (from-to)74-76
Number of pages3
JournalInformation Processing Letters
Volume147
DOIs
StatePublished - 1 Jul 2019

Keywords

  • Branching algorithms
  • Graph algorithms
  • Parameterized complexity

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