Cod sursa(job #1309656)

Utilizator simaghitaSima Gheorghe Eugen simaghita Data 5 ianuarie 2015 22:04:04
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.49 kb
#include <iostream>
#include<fstream>
#include<cmath>
#include<algorithm>
#define oo 1<<31-1
using namespace std;
int a[500005],b[800];
int n,rad;
void citire()
{
    ifstream fin("algsort.in");
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    fin.close();
    rad = (int)sqrt((double)n);
}
void sortare()
{
    ofstream fout("algsort.out");

    int i,poz,minim,lg,j;
    lg=1;
    minim=a[1];
    for(i=2;i<=n;i++)
    {
        minim=min(minim,a[i]);
        if(i%rad==0)
        {
            b[lg]=minim;
            lg++;
            minim=a[i+1];
        }
    }
    if(n%rad!=0)
    {
        minim=a[n];
        i=n-1;
        while(i%rad != 0)
        {
            minim=min(minim,a[i]);
            --i;
        }
        b[lg]=minim;
    }
    else lg--;
    int nr=0;
    while(nr<=n)
    {
        minim=b[1];
        poz=1;
        for(i=2;i<=lg;i++)
        {
            if(minim>b[i])
            {
                minim=b[i];
                poz=i;
            }
        }
        fout<<minim<<" ";
        nr++;

        int k=(poz-1)*rad + 1;
        i=poz*rad;
        if(i>n) i=n;
        for(j=k;j<=i;j++)
        {
            if(a[j]==minim)
                a[j]=(oo);
        }
        minim=a[k];
        for(j=k+1;j<=i;j++)
            minim=min(minim,a[j]);
        b[poz]=minim;
        if(nr==n)
            nr=n+2;
    }
    fout.close();
}
int main()
{
    citire();
    sortare();
    return 0;
}