Sympy

A grade

{ 3, 4, 22, 28, 29 }

B grade

{ 1, 2, 21 }

C grade

{ 6, 7, 8 }

F normal fail

{ 5, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 25 }

F(-1) timedout fail

{ 14, 20, 23, 24, 26, 27, 30, 31 }

F(-2) exception fail

{ }