Cod sursa(job #2870997)

Utilizator toma_ariciuAriciu Toma toma_ariciu Data 12 martie 2022 19:36:30
Problema Sortare prin comparare Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.83 kb
#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

const string filename = "algsort";
ifstream fin(filename + ".in");
ofstream fout(filename + ".out");

const int maxN = 500000;
int n, v[maxN + 5], h[maxN + 5];

void mergesort(int st, int dr)
{
    if(st == dr)
        return;
    int med = (st + dr) / 2;
    mergesort(1, med);
    mergesort(med + 1, dr);
    int i = st, j = med + 1, k = st;
    while(i <= med || j <= dr)
    {
        if(j > dr || (i <= med && v[i] < v[j]))
            h[k++] = v[i++];
        else
            h[k++] = v[j++];
    }
    for(i = st; i <= dr; i++)
        v[i] = h[i];
}

int main()
{
    fin >> n;
    for(int i = 1; i <= n; i++)
        fin >> v[i];
    mergesort(1, n);
    for(int i = 1; i <= n; i++)
        fout << v[i] << ' ';
}