Sympy

A grade

{ 8, 18, 19, 20, 24, 25, 26, 29, 30, 31 }

B grade

{ }

C grade

{ }

F normal fail

{ 1, 2, 3, 6, 7, 11, 12, 13, 16, 17, 21, 22, 23, 27, 28, 32, 33, 36, 37, 38, 39, 40, 41, 44, 45, 46, 49, 50, 51, 54, 55, 56, 59, 60, 61 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }