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 Ruby (2.3.3) (judge verdict: Wrong Answer)

file = $stdin
line = file.readlines
file.close
n = line[0].to_i

pow = 1
pow_10000 = 1
for i in 1..10000
    pow_10000 *= i
end

if n <= 10000
    for j in 1..n
    pow *= j
end
elsif n >= 10000 && n != 100000
    for k in 1..n-(n/10000.to_i)*10000
    pow *= k
end
pow *= pow_10000*(n/10000.to_i)
else
    pow = 10 * pow_10000
end
p pow%(10**9 + 7)