Reduce

A grade

{ }

B grade

{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 19, 20, 25, 26 }

C grade

{ }

F normal fail

{ 13, 16, 17, 21, 22, 23, 24, 27, 28, 29 }

F(-1) timedout fail

{ }

F(-2) exception fail

{ }