PROGRAMMING:Summation of factorial sequence expression with sign change
This problem requires the preparation of procedures, calculation sequence 1- 2!+ 3!- 4!+ The sum of the first n terms of.
###Input format:
The input gives a positive integer n of no more than 12 on a line.
###Output format:
Output integer results on one line.
###Input example:
```in
five
```
###Output example:
```out
one hundred and one
```
answer：If there is no answer, please comment
###Input format:
The input gives a positive integer n of no more than 12 on a line.
###Output format:
Output integer results on one line.
###Input example:
```in
five
```
###Output example:
```out
one hundred and one
```
answer：If there is no answer, please comment