wrong answer on spoj.pl???

why spoj.pl judge gives me wrong answer????

problem #24 Small factorials

here is the code:

using System;

class Program
{
static void Main()
{
long t = 0, n = 0, d = 0;
long c = 0;
t = Convert.ToInt64(Console.ReadLine().Trim());
while (c < t)
{
n = Convert.ToInt64(Console.ReadLine().Trim());
if (n < 100) ;
d= factorial(n);
Console.WriteLine(d);
c++;
}
}

static long factorial(long d)
{

long c = 0;
long e = 1;
long j = 1;
while (c<d)
{
j = j * e;
c++;
e++;
}
return j;
}
}

the code runs ok on visual basic, but spoj online judge gives me wrong answer... helppp.

the following code appears to run OK on my machine (for the unconscionably few test points I tried) ....

Code:

---

        // ****************************************

        private long myVersionOfHisMain() {
            return factorial(Int32.Parse(textBox2.Text));
        }

        private long factorial(long d)  {

            long c = 0;
            long e = 1;
            long j = 1;
            while (c < d)
            {
                j = j * e;
                c++;
                e++;
            }
            return j;
        }
    // ********************************************************


  and called as follows ...

            textBox1.Text = myVersionOfHisMain().ToString();

---

It is not entirely clear to me what your intent was in "Main", and it's too late at night for me to check the code ... the Tonight Show is almost on. I note what appears at first glance to be a "console.ReadLine" in the middle of a WHILE loop, that must be fun, and an IF that seems questionable to this admittedly novice programmer ...
"if (n < 100) ;"

But your "factorial" function came up running (at least insofar as my HP calculator was able to confirm).


I had two versions of factorial ...

Code:

---

        // ***************************************
        private long calculate(int n) {

            if (n >= 0)
                if (n < 2)
                    return 1;
                else
                    return n * calculate(n - 1);
            else
                return -1;
        }
        // **************************************


        // **************************************
        private long AltCalculate(int n) {
            int cnt = 2;
            long product = 1;

            if (n >= 0)
                while (cnt <= n) {
                    product *= cnt++;
                }
            else
                product = -1;

            return product;
        }
        // ***************************************


called as follows ...
            textBox1.Text = calculate(Int32.Parse(textBox2.Text)).ToString();

---