CDT, ADT etc… - Simon Fraser University

CDT, ADT etc… - Simon Fraser University

CMPT 225 Quick Sort Hoare Partitioning Algorithm Animation Quick Sort Hoare Partitioning Algorithm How it works pivot M T Q D left left does not move rightward because T > M C J B N Y right

right moves leftward because Y > M CMPT 225 - Anne Lavergne 2 Quick Sort Hoare Partitioning Algorithm How it works pivot M T left Q D C J B N Y right

right moves leftward because N > M CMPT 225 - Anne Lavergne 3 Quick Sort Hoare Partitioning Algorithm How it works pivot M T left Q D C J B N Y right

right stops moving leftward because B < M CMPT 225 - Anne Lavergne 4 Quick Sort Hoare Partitioning Algorithm How it works pivot M T Q D C J B N Y right left

swap CMPT 225 - Anne Lavergne 5 Quick Sort Hoare Partitioning Algorithm How it works pivot M B left Q D C J T N Y right

left stops moving right stops moving rightward leftward because Q > M because J < M CMPT 225 - Anne Lavergne 6 Quick Sort Hoare Partitioning Algorithm How it works pivot M B Q D C left T J N

Y right swap CMPT 225 - Anne Lavergne 7 Quick Sort Hoare Partitioning Algorithm How it works pivot M B J left D C T Q N Y

right left moves rightward because D < M CMPT 225 - Anne Lavergne 8 Quick Sort Hoare Partitioning Algorithm How it works pivot M B J D left C T Q N

Y right left moves rightward because C < M CMPT 225 - Anne Lavergne 9 Quick Sort Hoare Partitioning Algorithm How it works pivot M B J D C Q T N Y

left right left stops moving rightward because Q > M CMPT 225 - Anne Lavergne 10 Quick Sort Hoare Partitioning Algorithm How it works pivot M B J D C T Q N Y right

left right stops because left and right have crossed over CMPT 225 - Anne Lavergne 11 Quick Sort Hoare Partitioning Algorithm How it works pivot M C B pivot J D C M Q T N

Y right swap CMPT 225 - Anne Lavergne 12 Quick Sort Hoare Partitioning Algorithm How it works pivot C M B left J D C M Q T

N Y right left moves rightward because B < C CMPT 225 - Anne Lavergne 13 Quick Sort Hoare Partitioning Algorithm How it works pivot C M B J D C M Q

T N Y leftright left stops moving right moves leftward rightward because D > C because J > C CMPT 225 - Anne Lavergne 14 Quick Sort Hoare Partitioning Algorithm How it works pivot C M B J D C M

Q T N Y leftright right moves leftward because J > C CMPT 225 - Anne Lavergne 15 Quick Sort Hoare Partitioning Algorithm How it works pivot C M B J D C M

Q T N Y rightleft right stops because left and right have crossed over and B < C CMPT 225 - Anne Lavergne 16 Quick Sort Hoare Partitioning Algorithm How it works pivot pivot B C B C J

D C M Q T N Y right swap CMPT 225 - Anne Lavergne 17

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