Cod sursa(job #853949)

Utilizator UnforgivenMihai Catalin Botezatu Unforgiven Data 12 ianuarie 2013 16:34:35
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.85 kb
#include <fstream>
#define NMAX 500001
#include <cmath>

using namespace std;

ifstream input("algsort.in");
ofstream output("algsort.out");

long long vect[NMAX];
pair <unsigned int,int> tree[3 * NMAX];
int N;
const unsigned int Infinit = (1 << 31);

void build_tree(int nod , int left , int right )
{
    if (left == right)
    {
        tree[nod].first = vect[left];
        tree[nod].second = left;
    }
    else
    {
        int middle = (left + right) >> 1;
        int left_son = nod << 1;
        int right_son = left_son + 1;
        build_tree(left_son , left , middle);
        build_tree(right_son , middle+1 , right);

        if (tree[left_son].first < tree[right_son].first)
        {
            tree[nod] = tree[left_son];
        }
        else
        {
            tree[nod] = tree[right_son];
        }
    }
}

void update_tree(int nod , int left , int right , const unsigned int value , int A)
{
    if (left == right)
    {
        tree[nod].first = value;
        tree[nod].second = A;
    }
    else
    {
        int middle = (left + right) >> 1;
        int left_son = nod << 1;
        int right_son = left_son + 1;
        if (A <= middle) update_tree(left_son , left , middle , value , A);
        if (A > middle) update_tree(right_son , middle+1 , right , value , A);

        if (tree[left_son].first < tree[right_son].first)
        {
            tree[nod] = tree[left_son];
        }
        else
        {
            tree[nod] = tree[right_son];
        }
    }
}

int main()
{
    input >> N;
    for (int i =1;i<=N;i++)
    {
        input >> vect[i];
    }
    build_tree(1,1,N);

    for (int i =1;i<=N;i++)
    {
        output << tree[1].first << " ";
        update_tree(1,1,N,-Infinit,tree[1].second);
    }
    input.close();
    output.close();
    return 0;
}