Cod sursa(job #1331871)

Utilizator okros_alexandruOkros Alexandru okros_alexandru Data 1 februarie 2015 12:13:03
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.96 kb
#include <fstream>

#define Nmax 500100

using namespace std;

int N, V[Nmax];

void QuickSort(int A, int B) {

    int left = A;
    int right = B;
    int middleValue = V[(left + right) >> 1];

    while(left < right) {

        while(V[left] < middleValue)
            left++;

        while(V[right] > middleValue)
            right--;

        if(left <= right) {
            swap(V[left], V[right]);
            ++left;
            --right;
        }
    }

    if(A < right)
        QuickSort(A, right);

    if(left < B)
        QuickSort(left, B);

}
void Read() {

    ifstream in("algsort.in");
    in >> N;

    for(int i = 1; i <= N; i++)
        in >> V[i];

    in.close();
}
void Write() {

    ofstream out("algsort.out");

    for(int i = 1; i <= N; i++)
        out << V[i] << ' ';
    out << '\n';

    out.close();
}
int main() {

    Read();
    QuickSort(1, N);
    Write();

    return 0;
}