Cod sursa(job #912410)

Utilizator bulbulicaAlexandrescu Cristian bulbulica Data 12 martie 2013 13:18:29
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.9 kb
#include <fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int x[500005];
int n,k=0;
void interclasare(int pr,int mij1,int ul)
{
    k=0;
    int i=pr;
    int j=mij1+1;
    int y[500005];
    while(i<=mij1 && j<=ul)
    {
        if(x[i]<x[j])
        {
            y[++k]=x[i];
            i++;
        }
        else
        {
            y[++k]=x[j];
            j++;
        }
    }
    for(;i<=mij1;i++)
        y[++k]=x[i];
    for(;j<=ul;j++)
        y[++k]=x[j];
    for(i=1;i<=k;i++ )
    x[pr+i-1]=y[i];
}
void sortare(int p,int u)
{
    if(u-p>=1)
    {
        int mij=(p+u)/2;
        sortare(p,mij);
        sortare(mij+1,u);
        interclasare(p,mij,u);
    }
}
int main()
{
    f>>n;
    int i;
    for(i=1;i<=n;++i)
        f>>x[i];
    sortare(1,n);
    for(i=1;i<=n;++i)
        g<<x[i]<<' ';
    return 0;
}