Sympy

A grade

{ 2, 3, 4, 5, 10, 11, 12, 13, 14, 18, 19, 20, 22 }

B grade

{ 1, 21, 25, 26, 27, 28 }

C grade

{ }

F normal fail

{ 29, 31 }

F(-1) timedout fail

{ 6, 7, 8, 9, 15, 16, 17, 23, 24 }

F(-2) exception fail

{ 30, 32, 33, 34 }