Cod sursa(job #2245359)

Utilizator Mihai145Oprea Mihai Adrian Mihai145 Data 25 septembrie 2018 09:56:44
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.79 kb
#include <fstream>

using namespace std;

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

int N;
int v[500005];

void QuickSort(int lf, int rg)
{
    int st = lf, dr = rg, pivot = (rand() % (rg - lf + 1)) + lf;
    int val = v[pivot];

    do
    {
        while(st < rg && v[st] < val)
            st++;

        while(dr > lf && v[dr] > val)
            dr--;

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

    if(lf < dr)
        QuickSort(lf, dr);
    if(rg > st)
        QuickSort(st, rg);
}

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;
}