Cod sursa(job #3254840)

Utilizator Alexbora13Bora Ioan Alexandru Alexbora13 Data 8 noiembrie 2024 22:48:36
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.85 kb
#include <bits/stdc++.h>

using namespace std;

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

const int NMAX = 500000;

int n;
int v[NMAX+1], pos, pivot;

int partitie(int st, int dr)
{
    int l = st, r = dr;
    int mij = v[(st+dr)/2];
    while(l <= r)
    {
        while(v[l] < mij)
            l++;
        while(v[r] > mij)
            r--;
        if(l <= r)
        {
            swap(v[l], v[r]);
            l++;
            r--;
        }
    }
    return l;
}

void dei(int st, int dr)
{
    if(st < dr)
    {
        pivot = partitie(st, dr);
        dei(st, pivot-1);
        dei(pivot, dr);
    }
}

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