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A grade
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{ 5, 11, 15, 50 }
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B grade
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{ 1, 2, 3, 4, 6, 7, 8, 9, 13, 19, 20, 26, 28, 30, 34, 35, 38, 39, 40, 42, 43, 44, 45, 47, 48 }
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C grade
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{ 10, 12, 14, 29, 31, 49 }
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F normal fail
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{ 27, 51, 52, 53 }
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F(-1) timedout fail
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{ }
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F(-2) exception fail
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{ 16, 17, 18, 21, 22, 23, 24, 25, 32, 33, 36, 37, 41, 46 }