Maple

A grade

{ 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 25, 26, 29, 30, 31, 32, 33, 35, 38, 40, 41, 42, 43 }

B grade

{ 4, 16, 27, 34, 37, 39 }

C grade

{ 18, 28, 36 }

F normal fail

{ }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }