1324: 【循环】求n阶乘

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:172 Solved:124

Description

输入一个正整数n,求n!
  n!=1*2*3*…*n

Input

输入一个正整数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

HINT

5!=1*2*3*4*5=120