Problem:
Score : 200 points

Problem Statement

Snuke loves working out. He is now exercising N times.

Before he starts exercising, his power is 1. After he exercises for the i-th time, his power gets multiplied by i.

Find Snuke's power after he exercises N times. Since the answer can be extremely large, print the answer modulo 10^{9}+7.

Constraints

1 ≤ N ≤ 10^{5}

Input

The input is given from Standard Input in the following format:

N

Output

Print the answer modulo 10^{9}+7.

Sample Input 1

3

Sample Output 1

6

After Snuke exercises for the first time, his power gets multiplied by 1 and becomes 1.

After Snuke exercises for the second time, his power gets multiplied by 2 and becomes 2.

After Snuke exercises for the third time, his power gets multiplied by 3 and becomes 6.

Sample Input 2

10

Sample Output 2

3628800

Sample Input 3

100000

Sample Output 3

457992974

Print the answer modulo 10^{9}+7.

Solution in PHP (5.6.30) (judge verdict: Time Limit Exceeded)

<?php
class main {
    function run () {
        fscanf(STDIN, "%d", $n);
        $d = 1000000007;
        $ans = 1;
        for ($i = $n; $i > 0;$i--) {
            $ans *= $i;
            while ($ans > $d) {
                $ans -= $d;
            }
        }
        echo $ans;
    }

}

$obj = new main();
$obj->run();