Jagiellonian University Study Regulation is available here.
The grading scheme consists of the following:
5.0 – excellent: outstanding performance with only minor errors
4.5 – very good: above the average standard but with some errors
4.0 – good: generally sound work with a number of notable errors
3.5 – satisfactory: fair but with significant shortcomings
3.0 – passing: performance meets the minimum criteria
2.0 – failure: some more (or considerable further) work is required before the credit can be awarded