From de6f4c8e1fdb141056fe9fa5bf80bbdeb143786e Mon Sep 17 00:00:00 2001 From: Sandali Samarawickrama Date: Tue, 2 Oct 2018 09:17:52 +0530 Subject: [PATCH] Add quicksort.py --- sorting/quick_sort.py | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 sorting/quick_sort.py diff --git a/sorting/quick_sort.py b/sorting/quick_sort.py new file mode 100644 index 0000000..cbb917c --- /dev/null +++ b/sorting/quick_sort.py @@ -0,0 +1,28 @@ +# This function takes last element as pivot, places +# the pivot element at its correct position in sorted +# array, and places all smaller (smaller than pivot) +# to left of pivot and all greater elements to right +# of pivot +def partition(arr,low,high): + i = ( low-1 ) + pivot = arr[high] + + for j in range(low , high): + if arr[j] <= pivot: + i = i+1 + arr[i],arr[j] = arr[j],arr[i] + + arr[i+1],arr[high] = arr[high],arr[i+1] + return ( i+1 ) + + +def quickSort(arr,low,high): + if low < high: + + pi = partition(arr,low,high) + + quickSort(arr, low, pi-1) + quickSort(arr, pi+1, high) + + + pFad - Phonifier reborn

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