>>> from concurs import concurs

>>> round(concurs(10,6),1)
15.0
>>> round(concurs(22,8),1)
26.0
>>> round(concurs(14,11),2)
30.75
>>> round(concurs(14,2),1)
-3.0

>>> round(concurs(8,6),1)
17.0
>>> round(concurs(22,12),1)
70.0
>>> round(concurs(8,1),1)
-0.5
>>> round(concurs(20,2),1)
-3.5