Criminals

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;
import java.util.Arrays; 

public class Viikko5_c {

    static class FastReader {

        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
            }
            return str;
        }
    }

    public static void main(String[] args) {
        FastReader s = new FastReader();
        int n = s.nextInt();
        Set<Integer> gangs = new TreeSet<>();
        Set<String> criminals = new TreeSet<>();
        boolean t = true;

        for (int i = 0; i < n; i++) {
            String a = s.next();
            int b = Integer.parseInt(a.substring(0, 3));
            int c = Integer.parseInt(a.substring(4));
            gangs.add(b);
            
            char[] luvut1 = String.valueOf(b).toCharArray();
            char[] luvut2 = String.valueOf(c).toCharArray();
            Arrays.sort(luvut1);
            Arrays.sort(luvut2);
            
            for (int j = 0; j < 3; j++) {
                if (luvut2[j] != luvut1[j]) {
                    t = false;
                }
            }
            if (criminals.contains(a)) {
                t = false;
            }
            criminals.add(a);
            
        }
        
        if (t) {
            System.out.println(gangs.size());
        } else {
            System.out.println("QAQ");
        }

    }

}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED