int del(int *a, int N)
{
    int n = N;
    for ( int i = 0; i < n; i ++)
    {
        for ( int j = 0; j < N; j++ )
        {
            if ( (a[i] == a[j]) && (i != j) )
            {
                for (int k = j; k < N; k++)
                {
                    a[k] = a[k+1];
                }
                N--;
            }
        }
    }

    printf("\n");
    for (int i = 0; i < N; i++)
    {
        printf("%d ",a[i]);
    }

    return 0;
}