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  1. Prepare
  2. Java
  3. Data Structures
  4. Java Hashset
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Java Hashset

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  • billings_s_caleb
     + 0 comments

    I think the expected output for test case 5 is wrong

  • vishalkanuga1474
     + 2 comments

    JUST COPY PASTE THIS FOR PASSING TEST CASE 5......IT WORKED

    // Use a HashSet to store unique pairs Set uniquePairs = new HashSet<>();

    for (int i = 0; i < t; i++) {
    String[] pair = {pair_left[i], pair_right[i]};
    Arrays.sort(pair); // Sort the pair to ensure consistent ordering
    String sortedPair = pair[0] + "," + pair[1];
    uniquePairs.add(sortedPair);
    System.out.println(uniquePairs.size());
}

  • r3mdh066
     + 0 comments

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  • bharatganji94
     + 0 comments

    //Write your code here Set> pair = new HashSet<>(); for(int p1 =0;p1 pair1 = new HashSet(); pair1.add(pair_left[p1]); pair1.add(pair_right[p1]); pair.add(pair1); System.out.println(pair.size()); }

  • h2604952343
     + 0 comments
    import java.util.*;
import java.util.stream.IntStream;

public class Solution {

    public static void main(String[] args) {
		/*
		 * Enter your code here. Read input from STDIN. Print output to STDOUT. Your
		 * class should be named Solution.
		 */
		Scanner sc = new Scanner(System.in);
		int size = sc.nextInt();
		sc.nextLine();
		Set<String> set = new HashSet<>();
		
		IntStream.range(0, size).forEach(item -> {
			String line = sc.nextLine();
			String[] deLine = line.split(" ");
			String de = deLine[1] + " " + deLine[0];
			if (!set.contains(de)) {
				set.add(line);
			}
			System.out.println(set.size());
		});
        sc.close();
	}
}