Cod sursa(job #2943020)

Utilizator Robilika2007Robert Badea Robilika2007 Data 20 noiembrie 2022 14:25:49
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.12 kb
//mergesort

#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

ifstream fin ("algsort.in");
ofstream fout ("algsort.out");

#define MAX_n 500000
int v[MAX_n];
int interclas[MAX_n];

void interclasare (int left, int mid, int right)
{
    int i = left, j = mid + 1, poz = 0;
    while(i <= mid && j <= right)
    {
        if(v[i] < v[j])
            interclas[poz++] = v[i++];
        else
            interclas[poz++] = v[j++];
    }

    while (i <= mid)
        interclas[poz++] = v[i++];
    while (j <= right)
        interclas[poz++] = v[j++];

    for(i = 0; i < poz; i ++)
        v[left + i] = interclas[i];
}

void mergesort(int left, int right)
{
    if(left >= right) return;

    int mid = (left + right) / 2;

    mergesort (left, mid);
    mergesort (mid + 1, right);

    interclasare(left, mid, right);
}

int main()
{
    int n;

    fin >> n;

    for(int i = 0; i < n; ++i)
    {
        fin >> v[i];
    }

    mergesort(0, n - 1);

    for(int i = 0; i < n; ++i)
    {
        fout << v[i] << " ";
    }

    return 0;
}