The table below describes how the grade for a particular course is determined. Write a program that gives a course grade according to the provided table.
| points | grade |
|---|---|
| < 0 | impossible! |
| 0-49 | failed |
| 50-59 | 1 |
| 60-69 | 2 |
| 70-79 | 3 |
| 80-89 | 4 |
| 90-100 | 5 |
| > 100 | incredible! |
Sample outputs:
Give points [0-100]:
*37*
Grade: failed
Give points [0-100]:
*76*
Grade: 3
Give points [0-100]:
*95*
Grade: 5
Give points [0-100]:
*-3*
Grade: impossible!