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Algoritmer og Datastrukturer 1 ”Rush Hour ”

Algoritmer og Datastrukturer 1 ”Rush Hour ”. Gerth Stølting Brodal. 14 tilstande. Løsning af RushHour. procedure RushHour(Startopstilling c ) S = { c } Q = { c } while | Q |>0 c = delete( Q ) for alle mulige træk c → c ’ if c ’ ikke er i S then

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Algoritmer og Datastrukturer 1 ”Rush Hour ”

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  1. Algoritmer og Datastrukturer 1 ”Rush Hour” Gerth Stølting Brodal

  2. 14 tilstande

  3. Løsning af RushHour procedure RushHour(Startopstilling c) S = { c } Q = { c } while |Q|>0 c = delete(Q) for alle mulige træk c→c’ ifc’ ikke er i Sthen if c’ → rød exit then rapporter fundet en løsning insert(S,c’) insert(Q,c’) Hvilken rækkefølge ?

  4. Datastrukturer S = (balanceret) søgetræ Q = stak eller kø Bemærk: Hvis Q = kø så findes tilstandene efter stigende afstand fra starttilstanden

  5. Eksempler på løsninger

  6. 25 20 15 10 5 0 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000 110000 120000 130000 140000 150000 Kort 33: 100 x Random Walk Stilængde

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