[백준] 20376 Counting Monuments - Data Structure / Java

• 문제 링크

https://www.acmicpc.net/problem/20376

 

• 풀이 코드

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.HashSet;
import java.util.Set;

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));

        Set<String> set = new HashSet<>();
        String s;
        while ((s = br.readLine()) != null) set.add(s.substring(11));

        bw.write(String.valueOf(set.size()));
        bw.flush();
    }

}