PROGRAMMING:Piecewise function 1

The test data are - 2, 3 and 7 respectively.
###Input format:
Enter a number
###Output format:
Output x = how much, y = how much, output X and Y values are retained two decimal places
###Input example:
```in
-3
```
###Output example:
```out
x=-3.00,y=2.00
```






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