hi guys i think converting the both arrays into string and adding it into a set is much easy process

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();
    }
    Set<String> nameSet = new HashSet<>();
    for(int i =0; i<t; i++){
        String str = pair_left[i]+" "+pair_right[i];
        nameSet.add(str);
        System.out.println(nameSet.size());
    }
}

}