Cod sursa(job #1998720)

Utilizator GinguIonutGinguIonut GinguIonut Data 8 iulie 2017 21:58:17
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.94 kb
#include <fstream>

#define nMax 500001

using namespace std;

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

int n, v[nMax], aux[nMax];

void mergeSort(int st, int dr)
{
    if(dr-st+1<=1)
        return;
    int mid=st+(dr-st)/2;
    mergeSort(st, mid);
    mergeSort(mid+1, dr);

    int ii=st, jj=mid+1, poz=st;

    while(ii<=mid || jj<=dr)
    {
        if(v[ii]<v[jj])
        {
            aux[poz++]=v[ii];
            ii++;
        }
        else
        {
            if(jj>dr)
            {
                aux[poz++]=v[ii];
                ii++;
            }
            else
            {
                aux[poz++]=v[jj];
                jj++;
            }
        }
    }

    for(int i=st; i<=dr; i++)
        v[i]=aux[i];

}

int main()
{
    fin>>n;
    for(int i=1; i<=n; i++)
        fin>>v[i];
    mergeSort(1, n);
    for(int i=1; i<=n; i++)
        fout<<v[i]<<" ";
}