Problem1420--高精度-计算n的阶乘

1420: 高精度-计算n的阶乘

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 140  Solved: 87
[Status] [Submit] [Creator:]

Description

计算n的阶乘 (1<=n<=1000)

n!=1*2*3*...*n

Input

一个正整数n (1<=n<=1000)

Output

输出n的阶乘,开头不能有多余的0

Sample Input Copy

6

Sample Output Copy

720

HINT

样例1的提示
1*2*3*4*5*6=720


样例2
输入:
54
输出:
230843697339241380472092742683027581083278564571807941132288000000000000

Source/Category

 提高C