Maxima

A grade

{ 1, 2, 3, 4, 6, 7, 8, 21, 22, 24, 28, 29, 31 }

B grade

{ }

C grade

{ }

F normal fail

{ 5, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 23, 25, 30 }

F(-1) timedout fail

{ 14, 20 }

F(-2) exception fail

{ 27 }