char mas[] = { 8, 7, 3, 9, 5, 2};

void max3(int * a, int N)
{
    int i, retry;
    for(i = 0; i < N-3; ++i)
    {
        for(retry = 1; retry;)
        {
            retry = 0;
            for(int j = N-1; j >= N-3; --j)
            {
                if (a[i] > a[j])
                {
                    int tmp = a[i];
                    a[i] = a[j];
                    a[j] = tmp;
                    retry = 1;
                    break;
                }
            }
        }
    }
}


int main(int argc, const char * argv[])
{
    int a[] = { 3, 5, 7, 1, 9, 2, 8, 0, 1, 9 };
    max3(a,sizeof(a)/sizeof(a[0]));
    for(int j = sizeof(a)/sizeof(a[0])-3; j < sizeof(a)/sizeof(a[0]); ++j)
    {
        printf("%3d",a[j]);
    }
    printf("n");
}