Cod sursa(job #2897313)

Utilizator moise_alexandruMoise Alexandru moise_alexandru Data 3 mai 2022 14:35:19
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int maxn = 500005;
int aux[maxn];
int v[maxn];

void mergesort(int st, int dr)
{
    if(st >= dr)
        return;
    int mij = (st + dr) / 2;
    mergesort(st, mij);
    mergesort(mij + 1, dr);
    int i1 = st;
    int i2 = mij + 1;
    int poz = 0;
    while(i1 <= mij && i2 <= dr)
    {
        if(v[i1] < v[i2])
            aux[++poz] = v[i1++];
        else
            aux[++poz] = v[i2++];
    }
    while(i1 <= mij)
        aux[++poz] = v[i1++];
    while(i2 <= dr)
        aux[++poz] = v[i2++];
    for(int i = 0; i < poz; i++)
        v[i + st] = aux[i + 1];
    return;
}

int main()
{
    int n;
    in >> n;
    for(int i = 1; i <= n; i++)
        in >> v[i];
    mergesort(1, n);
    for(int i = 1; i <= n; i++)
        out << v[i] << " ";
    return 0;
}