Cod sursa(job #2312414)

Utilizator alexnigaNiga Alexandru alexniga Data 4 ianuarie 2019 20:17:06
Problema Sortare prin comparare Scor 80
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 2.58 kb
///SORTARE CU ARBORI BINARI DE INTERVALE
#include <iostream>
#include <fstream>
#define INF 2147483647

using namespace std;

ifstream f("algsort.in");
ofstream g("algsort.out");

struct structura
{
    int pozitie, valoare;
}x[1200000];

void update_arb_minus1(int left, int right, int poz_arb, int poz_numar, int numar, structura x[])
{
    if (left == right)
    {
        x[poz_arb].valoare = INF;
        return;
    }
    int middle = (left + right) / 2;

    if (poz_numar <= middle)
        update_arb_minus1(left, middle, 2 * poz_arb, poz_numar, numar, x);
    else
        update_arb_minus1(middle + 1, right, 2 * poz_arb + 1, poz_numar, numar, x);

    if(x[2 * poz_arb].valoare < x[2 * poz_arb + 1].valoare)
            x[poz_arb] = x[2 * poz_arb];
    else
        x[poz_arb] = x[2 * poz_arb + 1];
}

void update_arb(int left, int right, int poz_arb, int poz_numar, int numar, structura x[])
{
    if (left == right)
    {
        x[poz_arb].valoare = numar;
        x[poz_arb].pozitie = poz_numar;
        return;
    }
    int middle = (left + right) / 2;

    if (poz_numar <= middle)
        update_arb(left, middle, 2 * poz_arb, poz_numar, numar, x);
    else
        update_arb(middle + 1, right, 2 * poz_arb + 1, poz_numar, numar, x);

    if(x[2 * poz_arb].valoare < x[2 * poz_arb + 1].valoare)
            x[poz_arb] = x[2 * poz_arb];
    else
        x[poz_arb] = x[2 * poz_arb + 1];
}

void query(int left, int right, int poz_arb, int poz_left, int poz_right, structura x[], structura &maxim)
{
    if (poz_left <= left && poz_right >= right)
        {
            if (x[poz_arb].valoare < maxim.valoare && x[poz_arb].valoare != INF)
                {
                    maxim.valoare = x[poz_arb].valoare;
                    maxim.pozitie = x[poz_arb].pozitie;
                }
            return;
        }
    int middle = (left + right) / 2;
    if (poz_left <= middle)
        query(left, middle, 2 * poz_arb, poz_left, poz_right, x, maxim);
    if (poz_right > middle)
        query(middle + 1, right, 2 * poz_arb + 1, poz_left, poz_right, x, maxim);
}

int main()
{
    int n, m, i, numar;
    structura maxi;/// care e defapt minim :)

    f >> n;
    m = n;
    for (i = 1; i <= n; i++)
        {
            f >> numar;
            update_arb(1, n, 1, i, numar, x);
        }
    for (i = 1; i <= m; i++)
    {
            maxi.valoare = INF;
            query(1, n, 1, 1, n, x, maxi);
            update_arb_minus1(1, n, 1, maxi.pozitie, INF, x);
            g << maxi.valoare << " ";
    }
    return 0;
}