Cod sursa(job #2282911)

Utilizator CristyXtremeSimion Cristian CristyXtreme Data 14 noiembrie 2018 18:45:21
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.37 kb
#include <stdio.h>
#include <stdlib.h>

using namespace std;

void interschimba(int &a, int &b) {
    int aux = a;
    a = b;
    b = aux;
}

void alegere_pivot(int *v, int left, int right) {
    int poz;
    poz = left + (right - left) / 2;
    interschimba(v[poz], v[right]);
}

int partitionare(int *v, int left, int right) {
    alegere_pivot(v, left, right);
    int pivot = v[right], ileft = left, iright = right - 1;
    do {
        while (v[ileft] < pivot)
            ileft++;
        while (v[iright] > pivot)
            iright--;
        if (ileft < iright) {
            interschimba(v[ileft], v[iright]);
            ileft++;
            iright--;
        }
        else
            return ileft;
    }
    while (true);
}

void quicksort(int *v, int left, int right) {
    if (right - left > 0) {
        int poz = partitionare(v, left, right);
        interschimba(v[poz], v[right]);
        quicksort(v, left, poz - 1);
        quicksort(v, poz + 1, right);
    }
}

int main() {
    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);
    int n, numar;
    scanf("%d", &n);
    int numere[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &numar);
        numere[i] = numar;
    }
    quicksort(numere, 0, n - 1);
    for (int i = 0; i < n; i++)
        printf("%d ", numere[i]);
    return 0;
}