#P64A. Factorial

    ID: 9436 Type: RemoteJudge 2000ms 64MiB Tried: 0 Accepted: 0 Difficulty: 4 Uploaded By: Tags>*special problemimplementation*1300

Factorial

Description

Print the factorial of the given integer number n. The factorial of n is equal to 1·2·...·n.

The only line contains n (1 ≤ n ≤ 10).

Print the factorial of n.

Input

The only line contains n (1 ≤ n ≤ 10).

Output

Print the factorial of n.

3

5

6

120