Cod sursa(job #2219792)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 9 iulie 2018 18:02:48
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.88 kb
#include <iostream>
#include <fstream>
using namespace std;
int n,a[500001];
ifstream f("algsort.in");
ofstream g("algsort.out");
int partitionare(int st,int dr)
{
    int mij,aux,i,j;
    mij=a[st+(dr-st)/2];
    i=st-1;
    j=dr+1;
    while(i<j)
    {
        do
        {
            i++;
        }
        while(a[i]<mij);
        do
        {
            j--;
        }
        while(a[j]>mij);
        if(i<j)
        {
            aux=a[i];
            a[i]=a[j];
            a[j]=aux;
        }
    }
    return j;
}
void sortare(int st,int dr)
{
    int poz;
    if(st<dr)
    {
        poz=partitionare(st,dr);
        sortare(st,poz);
        sortare(poz+1,dr);
    }
}
int main()
{
    int i;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>a[i];
    }
    sortare(1,n);
    for(i=1;i<=n;i++)
        g<<a[i]<<" ";
    return 0;
}