240423 임스와 함께하는 미니게임

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());
	char ch = st.nextToken().charAt(0);

	HashSet<String> hs = new HashSet<>();
	while (n-- > 0) {
		hs.add(br.readLine());
	}

	int ans = hs.size();
	switch (ch) {
		case 'F':
			ans /= 2;
			break;
		case 'O':
			ans /= 3;
			break;
		default:
			break;
	}

	System.out.print(ans);
}

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