Cod sursa(job #2608230)

Utilizator FLORENTIN-GIULIANO.DUMITRUDumitru Florentin Giuliano FLORENTIN-GIULIANO.DUMITRU Data 30 aprilie 2020 20:17:18
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.03 kb
#include <fstream>
#include <cstdlib>

std::ifstream cin ("algsort.in");
std::ofstream cout("algsort.out");

bool sorted(int * a, int n){
    for (int i = 0; i < n - 1; i ++)
        if (a[i] > a[i + 1])
            return false;
        return true;
}

void quicksort(int *v, int i, int j){
    int mijloc = i + (j - i)/2;
    int pivot = v[mijloc];
    int sup = j, inf = i;

    while (i <= j){
        while (i < sup && v[i] < pivot)
            i ++;
        while (j > inf && v[j] > pivot)
            j --;
        if (i <= j){
            std::swap(v[i],v[j]);
            i ++;
            j --;
        }
    }
    if (i < sup)
        quicksort(v,i,sup);
    if (j > inf)
        quicksort(v,inf,j);
}

int main()
{

    int n;
    cin >> n;
    int *v;
    v = new int [n];
    for (int i = 0; i < n; i ++)
        cin >> v[i];
    if (!sorted(v,n))
        quicksort(v,0,n-1);
    for (int i = 0; i < n; i ++)
        cout << v[i] << " ";

    cin.close();
    cout.close();

    return 0;
}