demo-partition

# demo-partition - Partitioning in Quicksort How do we...

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1 Partitioning in Quicksort How do we partition in-place efficiently? Partition element = rightmost element. Scan from left for larger element. Scan from right for smaller element. Exchange. Repeat until pointers cross. Q U I C K S O R T I S C O O L partitioned partition element left right unpartitioned

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2 Partitioning in Quicksort swap me partitioned partition element left right unpartitioned Q U I C K S O R T I S C O O L How do we partition in-place efficiently? Partition element = rightmost element. Scan from left for larger element. Scan from right for smaller element. Exchange. Repeat until pointers cross.
3 Partitioning in Quicksort partitioned partition element left right unpartitioned swap me Q U I C K S O R T I S C O O L How do we partition in-place efficiently? Partition element = rightmost element. Scan from left for larger element. Scan from right for smaller element. Exchange. Repeat until pointers cross.

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4 Partitioning in Quicksort partitioned partition element left right unpartitioned swap me Q U I C K S O R T I S C O O L How do we partition in-place efficiently? Partition element = rightmost element. Scan from left for larger element. Scan from right for smaller element. Exchange. Repeat until pointers cross.
5 Partitioning in Quicksort partitioned partition element left right unpartitioned swap me Q U I C K S O R T I S C O O L swap me How do we partition in-place efficiently?

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