05_Java 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();
        }
        HashSet<String> h = new HashSet<>();
        for (int i = 0; i < t; i++)
        {
            h.add(pair_left[i]+','+pair_right[i]);
            System.out.println(h.size());
        }
   }
}