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 JavaScript (node.js v5.12) (judge verdict: Accepted)

'use strict'
const main = arg => {
	const input = arg.trim().split("\n");
	let N = input[0].split(' ')[0]
	function fact(n) {
		var result = 1;
		for (var i = 1; i <= n; i++) {
			result = result * i % 1000000007;
		}
		return result;
	}
	console.log(fact(N) % 1000000007)
}   
main(require('fs').readFileSync('/dev/stdin', 'utf8'));