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A grade
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{ 2, 6, 7, 9, 19, 24, 27, 28, 31, 32, 34, 36, 37, 38, 39, 40, 43, 46, 48 }
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B grade
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{ 1, 4, 8, 42, 44, 47, 49, 50 }
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C grade
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{ 3, 5, 12, 18, 33, 35 }
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F normal fail
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{ 10, 11, 13, 14, 15, 16, 17, 20, 21, 22, 23, 25, 26, 29, 30, 41, 45 }
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F(-1) timedout fail
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{ }
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F(-2) exception fail
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{ }