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Java 15
import java.io.*; import java.util.*; import java.util.regex.Pattern; import java.util.regex.Matcher; public class Solution { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = Integer.parseInt(scanner.nextLine()); for(int i=0;i<n;i++) { String str = scanner.nextLine(); if (Pattern.compile("^hackerrank((.*?hackerrank)?$)").matcher(str).find()) System.out.println("0"); else if (Pattern.compile("^hackerrank").matcher(str).find()) System.out.println("1"); else if (Pattern.compile("hackerrank$").matcher(str).find()) System.out.println("2"); else System.out.println("-1"); } } }
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Java 15