题目描述
Print the factorial of the given integer number n. The factorial of n is equal to 1·2·...·n.
Input
The only line contains n (1 ≤ n ≤ 10).
Output
Print the factorial of n.
输入格式
见题面 Input 部分
输出格式
见题面 Output 部分
样例输入
3
样例输出
6
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.
见题面 Input 部分
见题面 Output 部分