Cod sursa(job #1716818)

Utilizator iulian_f2kGuraliuc Iulian iulian_f2k Data 13 iunie 2016 19:22:54
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.07 kb
#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

int N;
vector<int> v;

void Read();
void Write();
void qSort(int left, int right);
void qSwap(int &a, int &b) {
    if(a == b)
        return;
    a += b;
    b = a - b;
    a -= b;
}

int main()
{
    Read();
    qSort(1, N);
    Write();
    return 0;
}

void qSort(int left, int right) {
    if(left >= right)
        return;
    int piv = (left + right) / 2;
    int i = left, j = right;

    while(i <= j) {
        while(v[i] < v[piv])
            i++;
        while(v[j] > v[piv])
            j--;
        if(i <= j) {
            qSwap(v[i], v[j]);
            i++;
            j--;
        }
    }
    qSort(left, j);
    qSort(i, right);
}

void Write() {
    for(int i = 1; i <= N; ++i)
        cout << v[i] << ' ';
    cout << '\n';
}

void Read() {
    freopen("algsort.in", "rt", stdin);
    freopen("algsort.out", "wt", stdout);

    scanf("%d", &N);
    v.assign(N+2, 0);
    for(int i = 1; i <= N; ++i)
        scanf("%d", &v[i]);
}