Cod sursa(job #1658361)

Utilizator SlevySlevoaca Stefan-Gabriel Slevy Data 21 martie 2016 13:45:22
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.85 kb
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <algorithm>
#include <ctime>

using namespace std;

const int NMAX = 500001;
ifstream in("algsort.in");
ofstream out("algsort.out");
int n;
int *a;

void quicksort(int x,int y)
{
    if(x<y)
    {
        int i=x,j=y;
        int pivot = (rand()%(j-i))+i;
        while(i<j)
        {
            if(a[i] > a[j])
            swap(a[i],a[j]);
            if(a[i]==pivot)
            j--;
            else
            i++;
        }
        int m = i;
        quicksort(x,m-1);
        quicksort(m+1,y);

    }
}

int main()
{
    srand(time(NULL));
    in>>n;
    a = new int[n+1];
    for(int i=1;i<=n;i++)
    in>>a[i];
    ///
    quicksort(1,n);
    ///
    for(int i=1;i<=n;i++)
    out<<a[i]<<" ";
    out.close();
    delete[] a;
    return 0;
}