Cod sursa(job #2840677)

Utilizator cdenisCovei Denis cdenis Data 28 ianuarie 2022 17:03:39
Problema Sortare prin comparare Scor 60
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.1 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("algsort.in");
ofstream fout("algsort.out");

const int MAX=5e5+5;
int v[MAX],n;

int partition(int *array, int st, int dr)
{
    int m=(st+dr)/2;
    swap(v[st],v[m]);
    int i=st,j=dr;
    int ii=0,jj=1;
    while(i<j)
    {
        if(v[i]>v[j])
        {
            swap(v[i],v[j]);
            swap(ii,jj);
        }
        i+=ii;
        j-=jj;
    }
    return i;
}

void quicksort(int *array, int left, int right)
{
    int stack[4*MAX];
    int i=0;

    stack[i++] = left;
    stack[i++] = right;

    while (i > 0)
    {
        right = stack[--i];
        left = stack[--i];

        if (left >= right)
             continue;

        int index = partition(array, left, right);
        stack[i++] = left;
        stack[i++] = index - 1;
        stack[i++] = index + 1;
        stack[i++] = right;
    }
}

int main()
{
    fin >> n;
    for(int i=1;i<=n;i++)
        fin >> v[i];
    quicksort(v,1,n);
    for(int i=1;i<=n;i++)
        fout << v[i] << " ";
    return 0;
}