Maple

A grade

{ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 27, 28, 29, 30, 32, 33, 34, 38, 39, 40, 42, 50 }

B grade

{ 24, 25, 26 }

C grade

{ }

F normal fail

{ 1, 31, 35, 36, 37, 41, 43, 44, 45, 46, 47, 48, 49 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }