Passed Test

import java.io.; import java.util.; import java.text.; import java.math.; import java.util.regex.*;

public class Solution {

public static void main(String[] args) { Scanner s = new Scanner(System.in); int t = s.nextInt(); String [] pair_left = new String[t]; String [] pair_right = new String[t];

    for (int i = 0; i < t; i++) {
        pair_left[i] = s.next();
        pair_right[i] = s.next();
    }
   // Use a HashSet to store unique pairs
    Set<String> 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());
    }

} }