Answers for "quick sort explain"

quick sort algorithm

def partition(a,l,h):
    pivot = a[l]
    i = l
    j=h
    while i<j:
        while a[i]<=pivot and i<h: i+=1
        while a[j]>pivot and j>l: j-=1
        if i<j: a[i],a[j]=a[j],a[i]
        
    a[j],a[l]=a[l],a[j]
    return j

def quickSort(a,l,h):
    if l < h:
        pi = partition(a, l, h)
        quickSort(a, l, pi - 1)
        quickSort(a, pi + 1, h)
        
#driver Code        
a =[10, 7, 8, 9, 1, 5 ]
quickSort(a, 0, len(a) - 1)
print(a)
#Output: [1, 5, 7, 8, 9, 10]

quick sort algorithm

def partition(a,l,h):
    pivot = a[l]
    i = l
    j=h
    while i<j:
        while a[i]<=pivot and i<h: i+=1
        while a[j]>pivot and j>l: j-=1
        if i<j: a[i],a[j]=a[j],a[i]
        
    a[j],a[l]=a[l],a[j]
    return j

def quickSort(a,l,h):
    if l < h:
        pi = partition(a, l, h)
        quickSort(a, l, pi - 1)
        quickSort(a, pi + 1, h)
        
#driver Code        
a =[10, 7, 8, 9, 1, 5 ]
quickSort(a, 0, len(a) - 1)
print(a)
#Output: [1, 5, 7, 8, 9, 10]

quicksort

algorithm quicksort(A, lo, hi) is
    if lo < hi then
        p := partition(A, lo, hi)
        quicksort(A, lo, p - 1)
        quicksort(A, p + 1, hi)

algorithm partition(A, lo, hi) is
    pivot := A[hi]
    i := lo
    for j := lo to hi do
        if A[j] < pivot then
            swap A[i] with A[j]
            i := i + 1
    swap A[i] with A[hi]
    return i

quicksort

algorithm quicksort(A, lo, hi) is
    if lo < hi then
        p := partition(A, lo, hi)
        quicksort(A, lo, p - 1)
        quicksort(A, p + 1, hi)

algorithm partition(A, lo, hi) is
    pivot := A[hi]
    i := lo
    for j := lo to hi do
        if A[j] < pivot then
            swap A[i] with A[j]
            i := i + 1
    swap A[i] with A[hi]
    return i

quick sort

//I Love Java
import java.io.*;
import java.util.*;
import java.util.stream.*;
import static java.util.Collections.*;

import static java.util.stream.Collectors.*;

public class Quick_Sort_P {

    static void swap(List<Integer> arr, int i, int j) {
        int temp = arr.get(i);
        arr.set(i, arr.get(j));
        arr.set(j, temp);
    }

    static int partition(List<Integer> arr, int low, int high) {

        int pivot = arr.get(high);
        int i = (low - 1);

        for (int j = low; j <= high - 1; j++) {

            if (arr.get(j) < pivot) {

                i++;
                swap(arr, i, j);
            }
        }
        swap(arr, i + 1, high);
        return (i + 1);
    }

    static void quickSort(List<Integer> arr, int low, int high) {
        if (low < high) {

            int pi = partition(arr, low, high);

            quickSort(arr, low, pi - 1);
            quickSort(arr, pi + 1, high);
        }
    }

    public static void main(String[] args) throws IOException {

        BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));

        List<Integer> arr = Stream.of(buffer.readLine().replaceAll("\\s+$", "").split(" ")).map(Integer::parseInt)
                .collect(toList());

        int n = arr.size();

        quickSort(arr, 0, n - 1);
        System.out.println("Sorted array: ");
        System.out.println(arr);
    }
}

quick sort

//I Love Java
import java.io.*;
import java.util.*;
import java.util.stream.*;
import static java.util.Collections.*;

import static java.util.stream.Collectors.*;

public class Quick_Sort_P {

    static void swap(List<Integer> arr, int i, int j) {
        int temp = arr.get(i);
        arr.set(i, arr.get(j));
        arr.set(j, temp);
    }

    static int partition(List<Integer> arr, int low, int high) {

        int pivot = arr.get(high);
        int i = (low - 1);

        for (int j = low; j <= high - 1; j++) {

            if (arr.get(j) < pivot) {

                i++;
                swap(arr, i, j);
            }
        }
        swap(arr, i + 1, high);
        return (i + 1);
    }

    static void quickSort(List<Integer> arr, int low, int high) {
        if (low < high) {

            int pi = partition(arr, low, high);

            quickSort(arr, low, pi - 1);
            quickSort(arr, pi + 1, high);
        }
    }

    public static void main(String[] args) throws IOException {

        BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));

        List<Integer> arr = Stream.of(buffer.readLine().replaceAll("\\s+$", "").split(" ")).map(Integer::parseInt)
                .collect(toList());

        int n = arr.size();

        quickSort(arr, 0, n - 1);
        System.out.println("Sorted array: ");
        System.out.println(arr);
    }
}