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