PROGRAMMING:Wang Xiaobi
Wang Xiaoer boasted that he had a good knife. Someone put a big pancake on the chopping board and asked him, "the pancake is not allowed to leave the chopping board. How many pieces can n be cut into?"
###Input format:
The input has only one line, which is a non negative integer n. The value of N does not exceed 100.
###Output format:
The output has a line for the number of cakes.
###Input sample 1:
```in
two
```
###Output sample 1:
```out
four
```
###Input sample 2:
```in
three
```
###Output sample 2:
```out
seven
```
answer：If there is no answer, please comment
###Input format:
The input has only one line, which is a non negative integer n. The value of N does not exceed 100.
###Output format:
The output has a line for the number of cakes.
###Input sample 1:
```in
two
```
###Output sample 1:
```out
four
```
###Input sample 2:
```in
three
```
###Output sample 2:
```out
seven
```
answer：If there is no answer, please comment