33 lines
617 B
Dart
33 lines
617 B
Dart
String integerToRoman(int number) {
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const conversionRules = [
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(1000, 'M'),
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(900, 'CM'),
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(500, 'D'),
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(400, 'CD'),
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(100, 'C'),
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(90, 'XC'),
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(50, 'L'),
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(40, 'XL'),
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(10, 'X'),
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(9, 'IX'),
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(5, 'V'),
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(4, 'IV'),
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(1, 'I'),
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];
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if (number <= 0 || number > 3999) {
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throw ArgumentError('Number must be between 1 and 3999');
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}
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final result = StringBuffer();
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var remaining = number;
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for (final (value, symbol) in conversionRules) {
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while (remaining >= value) {
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result.write(symbol);
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remaining -= value;
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}
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}
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return result.toString();
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}
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