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JavaTagContentExtractor.java
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JavaTagContentExtractor.java
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/**
* Mindula Dilthushan
* Hacker Rank - Java
* minduladilthushan1@gmail.com
*/
import java.util.*;
import java.util.regex.*;
public class JavaTagContentExtractor {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int testCases = Integer.parseInt(in.nextLine());
String regexPatern = "(<[^>]*>)";
Pattern stringPatern = Pattern.compile(regexPatern);
while (testCases > 0) {
String line = in.nextLine();
int pos = 0;
Matcher m = stringPatern.matcher(line);
String previousHTMLTag = null;
int previousTagPos = -1;
boolean didFind = false;
while (m.find()) {
String htmlTag = line.substring(m.start(), m.end());
if (htmlTag.charAt(1) != '/') {
previousHTMLTag = htmlTag;
previousTagPos = m.end();
} else if (htmlTag.charAt(1) == '/' && previousHTMLTag != null) {
if (previousHTMLTag.substring(1).equals(htmlTag.substring(2)) && previousHTMLTag.length() > 2 && m.start() > previousTagPos + 1) {
System.out.println(line.substring(previousTagPos, m.start()));
didFind = true;
}
previousHTMLTag = null;
}
}
System.out.print(didFind ? "" : "None\n");
testCases--;
}
}
}