Cod sursa(job #3345857)

Utilizator Sabin1133Padurariu Sabin Sabin1133 Data 11 martie 2026 15:07:18
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.76 kb
#include <iostream>

#define NMAX 500000

void merge_sort(int *v, int n)
{
    int *w;

    if (n < 2)
        return;

    merge_sort(v, n / 2);
    merge_sort(v + n / 2, n - n / 2);

    w = new int[n];

    for (int i = 0, j = n / 2, k = 0; k < n; ++k)
        if (j >= n || (i < n / 2 && v[i] < v[j]))
            w[k] = v[i++];
        else
            w[k] = v[j++];

    for (int i = 0; i < n; ++i)
        v[i] = w[i];

    delete[] w;
}

int main()
{
    int n;
    int v[NMAX];

    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);

    std::cin >> n;

    for (int i = 0; i < n; ++i)
        std::cin >> v[i];

    merge_sort(v, n);

    for (int i = 0; i < n; ++i)
        std::cout << v[i] << ' ';

    std::cout << '\n';

    return 0;
}