Sympy

A grade

{ 1, 5, 6, 7, 8, 9, 10, 11, 12, 16, 20, 21, 22, 23, 24, 25, 26, 27, 30 }

B grade

{ 2, 3, 4, 13, 14, 15, 17, 18, 19 }

C grade

{ 28, 29, 31 }

F normal fail

{ 33, 34 }

F(-1) timedout fail

{ 32, 35 }

F(-2) exception fail

{ 36, 37, 38 }