29 lines
711 B
ObjectPascal
29 lines
711 B
ObjectPascal
var table := Matr(
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|0, 3, 1, 7, 5, 9, 8, 6, 4, 2|,
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|7, 0, 9, 2, 1, 5, 4, 8, 6, 3|,
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|4, 2, 0, 6, 8, 7, 1, 3, 5, 9|,
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|1, 7, 5, 0, 9, 8, 3, 4, 2, 6|,
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|6, 1, 2, 3, 0, 4, 5, 9, 7, 8|,
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|3, 6, 7, 4, 2, 0, 9, 5, 8, 1|,
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|5, 8, 6, 9, 7, 2, 0, 1, 3, 4|,
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|8, 9, 4, 5, 3, 6, 2, 0, 1, 7|,
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|9, 4, 3, 8, 6, 1, 7, 2, 0, 5|,
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|2, 5, 8, 1, 4, 3, 6, 7, 9, 0|
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);
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function Damn(s: string): boolean;
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begin
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var interim := 0;
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foreach var c in s do
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interim := table[interim, c.ToDigit];
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Result := interim = 0;
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end;
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begin
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var numbers := Arr(5724, 5727, 112946, 112949);
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foreach var num in numbers do
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if Damn(num.ToString) then
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Println(num, 'is valid')
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else Println(num, 'is invalid')
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end.
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