Description

Calculate the value of Sn=1!+2!+3!+4!+5!+…+n!, where n is a number.

Note: Since the value of n can be relatively large, Sn should be defined as a long long type.

Input Format

Input an integer N

Output Format

Output a number representing the sum of factorials from 1 to N

i.e.: Sn=1!+2!+3!+4!+5!+…+n!

Note: If using printf, the output format specifier should be %lld

```input1 5 ``` ```output1 153 ``` ## 翻译结果

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