AOJ 497 - n的阶乘

n的阶乘

Time Limit: 1000ms

Memory Limit: 32768KB

64-bit integer IO format: %lld Java class name: Main

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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

4
5
15

Sample Output

24
120
1307674368000

Author

Admin

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