using namespace std;
#include <iostream>


int main()
{
    setlocale(LC_ALL, "russian");

    int i, n, j, k, l; int a; int* b; int* c; k = 0;

    FILE* f;
    f = fopen("D:\\c++\\lab.dat","wb");
    cout << "Введите кол-во элементов: ";
    cin >> n;  b = new int[n];

    for (i = 0; i < n; i++)
    {
        cout << "Элемент номер " << i << ": ";
        cin >> a;
        fwrite(&a, sizeof(int), 1, f);
    }
    fclose(f);

    f = fopen("D:\\c++\\lab.dat", "rb");

    fread(b, sizeof(int), n, f);

    for (i = 0; i < n; i++)
        cout << b[i];

    fclose(f);

    for (i = 0; i < n; i++)
        if ((b[i] % 5 == 0) && (b[i]>0)) k++;

    c = new int[k];

    for(i=0; i<n-1;i++)
        for(j=i+1;j<n;j++)
            if ((b[i] % 5 != 0) && (b[j] % 5 == 0) && (b[j]>0))
            {
                l = b[i];
                b[i] = b[j];
                b[j] = l;
            }


    for (i = 0; i < k; i++)
        c[i] = b[i];

    for (i = 0; i < n - 1; i++)
        for (j = i + 1; j < n; j++)
            if (c[i] < c[j])
            {
                l = b[i];
                b[i] = b[j];
                b[j] = l;
            }


    cout << endl;
    cout << "Массив перестроен:" << endl;

    for (i = 0; i < k; i++)
        cout << c[i];

}