// retoor <retoor@molodetz.nl>
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import "io" for Stdin
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var size = Stdin.windowSize
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System.print(size == null || size is List) // expect: true
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if (size != null) {
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System.print(size.count == 2)
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System.print(size[0] > 0)
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System.print(size[1] > 0)
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}
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