Cod sursa(job #954946)

Utilizator Andrei1998Andrei Constantinescu Andrei1998 Data 30 mai 2013 14:55:12
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.06 kb
#include <fstream>

using namespace std;

int v[500001];
int aux[500001];

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

void m_sort(int st,int dr)
{
    if(st==dr)
        return;
    else if((dr-st)==1)
    {
        if(v[st]>v[dr])
            schimba(v[st],v[dr]);
    }
    else
    {
        int mijl=(st+dr)>>1;
        m_sort(st,mijl);
        m_sort(mijl+1,dr);
        int i=st,j=mijl+1;
        int poz=0;
        while((i<=mijl) && (j<=dr))
            if(v[i]<v[j])
                aux[poz++]=v[i++];
            else
                aux[poz++]=v[j++];
        while(i<=mijl)
            aux[poz++]=v[i++];
        while(j<=dr)
            aux[poz++]=v[j++];
        for(i=0;i<poz;i++)
            v[st+i]=aux[i];
    }
}

int main()
{
    ifstream fin("algsort.in");
    ofstream fout("algsort.out");

    int n,i;
    fin>>n;

    for(i=1;i<=n;i++)
        fin>>v[i];

    m_sort(1,n);

    for(i=1;i<=n;i++)
        fout<<v[i]<<' ';

    fin.close();
    fout.close();
    return 0;
}