[백준] 25757번 임스와 함께하는 미니게임! (silver 5

import java.io.*;
import java.util.*;
public class Main{
    public static void main(String[] args)throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(System.out));
        HashMap<String,Integer> map=new HashMap<>();
        StringTokenizer st=new StringTokenizer(br.readLine());
        int how=Integer.parseInt(st.nextToken());
        String a=st.nextToken();
        int people=0;
        if(a.equals("Y")){
            people=1;
        }
        else if(a.equals("F")){
            people=2;
        }
        else{
            people=3;
        }

        for(int i=0; i<how; i++){
            String name=br.readLine();
            if(map.get(name)==null){
                map.put(name,1);
            }
        }

        bw.write(map.size()/people+"");
        bw.flush();
    }


}