PROGRAMMING:Don't guess what the girlfriend of ly series thinks

One day, ly's roommate smile, very distressed to ly for help, it turned out that the smile of her girlfriend to smile to give her a rose, so smile ran 50 kilometers, finally found a florist, bought a flower for her girlfriend and then run back! But! Unexpectedly! My girlfriend is still not happy! Smile had to ask smart ly for help, ly told him that his girlfriend to 2 roses, you have to give her at least 3! Smart acmer, can you help smile and calculate how many flowers he will give his girlfriend at least?
###Input format:
Enter the number of roses a wants for her girlfriend.
###Output format:
How many roses does a girlfriend need at least.
###Input example:
Here is a set of inputs. For example:
```in
one
```
###Output example:
The corresponding output is given here. For example:
```out
two
```







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