Sympy

A grade

{ 1, 2, 3, 4, 6, 7, 8, 19, 20, 21, 22, 50, 66 }

B grade

{ }

C grade

{ 5, 16 }

F normal fail

{ 9, 10, 11, 24, 25, 26, 27, 28, 43, 44, 48, 49, 51, 52, 53, 54, 58, 62, 63, 64, 65, 67, 68, 69, 70, 71 }

F(-1) timedout fail

{ 36, 37, 38, 39, 40, 41, 42, 45, 46, 47, 55, 56, 57, 60, 61 }

F(-2) exception fail

{ }