Cod sursa(job #1343185)

Utilizator geniucosOncescu Costin geniucos Data 14 februarie 2015 23:14:53
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.05 kb
#include<cstdio>
#include<cstdlib>
#include<ctime>

using namespace std;

int N, a[500009], b[500009];

inline void swap (int &x, int &y)
{
    int aux = x;
    x = y;
    y = aux;
}

void Sort (int st, int dr)
{
    if (st>= dr)
        return ;

    int mij = st + rand() % (dr - st + 1);
    //int mij = (st + dr) >> 1;
    Sort (st, mij);
    Sort (mij + 1, dr);
    for (int i=st; i<=dr; i++)
        b[i] = a[i];

    int i, j, nr = st - 1;
    i = st;
    j = mij + 1;
    while (i<=mij || j<=dr)
    {
        if (i > mij || b[j] < b[j])
            a[++nr] = b[j++];
        else
        if (j > dr)
            a[++nr] = b[i++];
        else
        if (b[i] < b[j])
            a[++nr] = b[i++];
        else
            a[++nr] = b[j++];
    }
}

int main()
{
freopen ("algsort.in", "r", stdin);
freopen ("algsort.out", "w", stdout);

srand (time (0));

scanf ("%d", &N);
for (int i=1; i<=N; i++)
    scanf ("%d", &a[i]);

Sort (1, N);

for (int i=1; i<=N; i++)
    printf ("%d ", a[i]);

return 0;
}