4259: 阶乘之和

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:85 Solved:34

Description

求 S=1!+2!+3!+....+n!




Input

一个正整数n,范围是 [2, 11] 

Output

所求的和。


Sample Input Copy

10

Sample Output Copy

4037913