Hashset.java

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();
        }

//Write your code here

    HashSet<List<String>> uniquePair = new HashSet<>();
    
    for(int i=0; i<t; i++){
        List<String> list = new ArrayList<>();
        list.add(pair_left[i]);
        list.add(pair_right[i]);
        
        uniquePair.add(list);
        System.out.println(uniquePair.size());
    }

    }
}