Problem1272--求n阶乘

1272: 求n阶乘

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 430  Solved: 125
[Status] [Submit] [Creator:]

Description

 输入一个正整数n，求n!
  n!=1*2*3*…*n

Input

一个整数N

Output

 一行，包行一个整数代表n阶乘的值

Sample Input Copy 

5

Sample Output Copy 

120

Source/Category

入门级 
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