10_Vorlesung_17_Jan_2008 - Datenstrukturen Algorithmen VO...

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17.01.2008 [email protected] Datenstrukturen & Algorithmen VO 708.031 10. Vorlesung, am 17.Jan. 2008
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17.01.2008 [email protected] Ohne Vorsortierung Mit Vorsortierung Sequentielle Suche Speicherung nach Zugriffswahrscheinlichkeiten Selbstanordnende Felder Binärsuche (Binary Bisection Search) Interpolationssuche Fastsearch Wiederholung – Suchen in linearen Feldern
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17.01.2008 [email protected] Laufzeitverhalten der Suchverfahren O(n) O(n) Unsortiert Sequentielles Suchen O ( n ) O (log log n ) Interpolationssuche O (log n ) O (log n ) Binärsuche Schlechtester Fall Mittlerer Fall
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17.01.2008 [email protected] FastSearch Kombination von Binärsuche und Interpolationssuche. Das Ergebnis ist O(log log n) im mittleren Fall und O(log n) im schlechtesten Fall . Idee: Binärsuche Interpolationssuche
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17.01.2008 [email protected] FastSearch rekursive Version *
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17.01.2008 [email protected] Laufzeitverhalten der Suchverfahren O (log n ) O (log log n ) „FastSearch“ O(n) O(n) Unsortiert Sequentielles Suchen O ( n ) O (log log n ) Interpolationssuche O (log n ) O (log n ) Binärsuche Schlechtester Fall Mittlerer Fall
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17.01.2008
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