Sympy

A grade

{ 8, 9, 10, 11, 12, 14, 16, 20, 22, 38 }

B grade

{ 43, 44, 45, 47, 48 }

C grade

{ 1, 2, 3, 4, 5, 6 }

F normal fail

{ 7, 13, 15, 17, 18, 19, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 36, 39, 40, 41, 42, 46, 49 }

F(-1) timedout fail

{ 37 }

F(-2) exception fail

{ }