Giac

A grade

{ 1, 3, 8, 10, 11, 12, 18, 19 }

B grade

{ 2, 4, 5, 6, 7, 9, 13, 14, 16, 17, 21 }

C grade

{ 15, 20 }

F normal fail

{ }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }