12 lines
370 B
Java
12 lines
370 B
Java
String decode(String string) {
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Pattern pattern = Pattern.compile("(\\d+)(.)");
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Matcher matcher = pattern.matcher(string);
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StringBuilder decoded = new StringBuilder();
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int count;
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while (matcher.find()) {
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count = Integer.parseInt(matcher.group(1));
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decoded.append(matcher.group(2).repeat(count));
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}
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return decoded.toString();
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}
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