Giac

A grade

{ 2, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 19, 20 }

B grade

{ 1, 3, 10, 12, 18 }

C grade

{ }

F normal fail

{ 21 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }