Criminals

Note: input/Kisa51.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

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//package kisa51;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Scanner;

/**
 *
 * @author reetta
 */
public class Kisa51 {

    /**
     * @param args the command line arguments
     */
    //task C
    
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner s = new Scanner(System.in);
        int n = s.nextInt();
        s.nextLine();
        boolean fail=false;
        
        HashSet<String> mems = new HashSet(); //unique members
        HashSet<String> gangs = new HashSet();
        
        for (int i = 0; i < n; i++) {
            String mem = s.nextLine();
            //unique
            if(mems.contains(mem)){
                fail = true;
                break;
            }else{
                mems.add(mem);
            }
            //gang
            if(!gangs.contains(mem.substring(0,3))){
                gangs.add(mem.substring(0,3));
            }
            //valid
            if(!valid(mem)){
                fail = true;
                break;
            }
            
            
        }
        
        
        
        //result
        if(!fail){
            System.out.println(gangs.size());
        }else{
            System.out.println("QAQ");
        }
                    
        
    }
    
    public static boolean valid(String mem){
        if(mem.length()!= 7){
            return false;
        }
        
        ArrayList<Character> a = new ArrayList<>();
        a.add(mem.charAt(0));
        a.add(mem.charAt(1));
        a.add(mem.charAt(2));
        ArrayList<Character> b = new ArrayList<>();
        b.add(mem.charAt(4));
        b.add(mem.charAt(5));
        b.add(mem.charAt(6));
        
        Collections.sort(a);
        Collections.sort(b);
        
        for(int i = 0; i < 3; i++){
            if(!a.get(i).equals(b.get(i))){
                return false;
            }
        }
        return true;
    }
    
    
    
}

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