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16 lines
261 B
Kotlin
16 lines
261 B
Kotlin
import java.util.ArrayList
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trait Tr {
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fun extra() : String = "_"
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}
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class N() : Tr {
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override fun extra() : String = super<Tr>.extra() + super<Tr>.extra()
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}
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fun box(): String {
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val n = N()
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if (n.extra() == "__") return "OK"
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return "fail";
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}
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