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@@ -3,43 +3,43 @@ import java.util.regex.Pattern;
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public class RunLengthEncoding {
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public String encode(String data) {
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- String encodedData = "";
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+ String encodedData = "";
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- for(int i = 0; i < data.length(); i++) {
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- char c = data.charAt(i);
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+ for (int i = 0; i < data.length(); i++) {
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+ char c = data.charAt(i);
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- if(i != 0 && c == data.charAt(i - 1)) continue;
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+ if (i != 0 && c == data.charAt(i - 1)) continue;
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- int amt = 1;
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+ int amt = 1;
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- for(int j = i+1; j < data.length() && c == data.charAt(j); j++) {
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- amt++;
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- }
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+ for (int j = i + 1; j < data.length() && c == data.charAt(j); j++) {
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+ amt++;
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+ }
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- if(amt == 1) encodedData += c;
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- else encodedData += amt + Character.toString(c);
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- }
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+ if (amt == 1) encodedData += c;
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+ else encodedData += amt + Character.toString(c);
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+ }
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- return encodedData;
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+ return encodedData;
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}
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public String decode(String encodedData) {
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- String decodedData = "";
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+ String decodedData = "";
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Pattern pattern = Pattern.compile("[0-9]+|[a-zA-Z\\s]");
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Matcher matcher = pattern.matcher(encodedData);
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while (matcher.find()) {
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- try {
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- int number = Integer.parseInt(matcher.group());
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-
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- matcher.find();
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-
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- while (number-- != 0) {
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- decodedData += matcher.group();
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- }
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- } catch(NumberFormatException e) {
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- decodedData+=matcher.group();
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- }
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+ try {
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+ int number = Integer.parseInt(matcher.group());
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+
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+ matcher.find();
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+
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+ while (number-- != 0) {
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+ decodedData += matcher.group();
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+ }
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+ } catch (NumberFormatException e) {
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+ decodedData += matcher.group();
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+ }
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}
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return decodedData;
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