[백준 25757] 임스와 함께하는 미니게임 (JAVA)

https://www.acmicpc.net/problem/25757

25757번: 임스와 함께하는 미니게임

 

Set을 사용하여 이전에 함께 게임했던 사람인지 체크하면 간단하게 풀 수 있었다!

 

 

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine());
		int n = Integer.parseInt(st.nextToken());
		String game = st.nextToken();
		int players=0;
		if(game.equals("Y")) players=1;
		else if(game.equals("F")) players=2;
		else if(game.equals("O")) players=3;
		
		int count=0;
		int playersTemp=players;
		Set<String> set = new HashSet<>();
		for(int i=0;i<n;i++) {
			String name = br.readLine();
			if(set.contains(name)) continue;
			else {
				set.add(name);
				playersTemp--;
				if(playersTemp==0) {
					count++;
					playersTemp=players;
				}
			}
		}
		System.out.println(count);
	}

}