Cod sursa(job #2897329)

Utilizator vlanderovlad rosu vlandero Data 3 mai 2022 14:51:19
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.06 kb
#include <fstream>

using namespace std;

ifstream cin("algsort.in");
ofstream cout("algsort.out");

int v[500001], n;

void merge(int st, int dr, int mid)
{
    int k[500001];
    int i = st, j = mid + 1, cnt = 0;
    while (i <= mid && j <= dr)
    {
        if (v[i] < v[j])
        {
            k[cnt++] = v[i];
            ++i;
        }
        else
        {
            k[cnt++] = v[j];
            ++j;
        }
    }
    for (; i <= mid; ++i)
        k[cnt++] = v[i];
    for (; j <= dr; ++j)
        k[cnt++] = v[j];
    for (i = 0; i < cnt; ++i)
    {
        v[st + i] = k[i];
    }
}
void mergeSort(int st, int dr)
{
    int mid = (dr + st) / 2;
    if (st < dr)
    {
        mergeSort(st, mid);
        mergeSort(mid + 1, dr);
        merge(st, dr, mid);
    }
}
void printArray()
{
    for (int i = 0; i < n; ++i)
        cout << v[i] << " ";
    cout << endl;
}
int main()
{
    cin >> n;
    int i;
    for (i = 0; i < n; ++i)
        cin >> v[i];
    mergeSort(0, n - 1);
    printArray();
    return 0;
}