1195: 1.3 n的阶乘

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:196 Solved:68

Description

输入一个正整数n,输出n的阶乘。

Input

正整数n(0<=n<=20)

Output

输入可能包括多组数据,对于每一组输入数据,输出n的阶乘

Sample Input Copy

4
5
15

Sample Output Copy

24
120
2004310016

Source/Category