Cod sursa(job #1347882)

Utilizator andreeadimaDima Andreea andreeadima Data 19 februarie 2015 12:24:01
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.15 kb
#include <fstream>
using namespace std;
ifstream fin ("algsort.in");
ofstream fout ("algsort.out");
int n, v[500005];
int a[500005];
void interclasare ( int x[], int s, int p, int d)
{
    int i,j,nr;
    i = s;
    j = p+1;
    nr = 0;
    while ( i <= p && j <= d)
        if (x[i]<=x[j])
            {
                a[nr]=x[i];
                nr++;
                i++;
            }
        else
        {
            a[nr]=x[j];
            nr++;
            j++;
        }
    while ( i <= p)
    {
        a[nr]=x[i];
        nr++;
        i++;
    }
    while ( j <= d)
    {
        a[nr]=x[j];
        nr++;
        j++;
    }
    for (i = 0; i < nr; i++)
        x[i+s] = a[i];
}
void mergesort ( int b[], int st, int dr)
{
    if (st == dr)
        return;
    int mij = (st + dr)/2;
    mergesort (b,st, mij);
    mergesort (b,mij+1, dr);
    interclasare(b,st,mij,dr);
}
int main()
{
    fin>>n;
    int i;
    for (i = 0; i < n; i++)
        fin>>v[i];
    fin.close();
    mergesort(v,0,n-1);
    for (i = 0; i < n; i++)
        fout<<v[i]<<" ";
    fout<<'\n';
    fout.close();
    return 0;
}