Cod sursa(job #2416205)

Utilizator Mihai145Oprea Mihai Adrian Mihai145 Data 27 aprilie 2019 10:22:50
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.82 kb
#include <fstream>

using namespace std;

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

const int NMAX = 500000;

int N, v[NMAX + 5];

void QuickSort(int l, int r)
{
    int st = l, dr = r, pivot = (l + r) >> 1;
    int valPivot = v[pivot];

    do
    {
        while(st < r && v[st] < valPivot)
            st++;

        while(dr > l && v[dr] > valPivot)
            dr--;

        if(st <= dr)
        {
            swap(v[st], v[dr]);
            st++, dr--;
        }
    }
    while(st <= dr);

    if(st < r)
        QuickSort(st, r);

    if(dr > l)
        QuickSort(l, dr);
}

int main()
{
    fin >> N;

    for(int i = 1; i <= N; i++)
        fin >> v[i];

    QuickSort(1, N);

    for(int i = 1; i <= N; i++)
        fout << v[i] << ' ';

    return 0;
}