백준 5635

BAEKJOON_5635.java

package silver_5;

import java.io.*;
import java.time.LocalDate;
import java.util.Comparator;
import java.util.StringTokenizer;
import java.util.TreeSet;

class Person {
    String name;
    LocalDate date;

    public Person(String name, int year, int month, int day) {
        this.name = name;
        date = LocalDate.of(year, month, day);
    }
}

public class NUM_5635 {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(System.out));
        TreeSet<Person> personTreeSet = new TreeSet<>(Comparator.comparing(o -> o.date));
        StringTokenizer stringTokenizer;

        int count = Integer.parseInt(bufferedReader.readLine());

        for (int i = 0; i < count; i++) {
            stringTokenizer = new StringTokenizer(bufferedReader.readLine());
            String name = stringTokenizer.nextToken();
            String day = stringTokenizer.nextToken();
            String month = stringTokenizer.nextToken();
            String year = stringTokenizer.nextToken();

            Person person = new Person(name, Integer.parseInt(year), Integer.parseInt(month), Integer.parseInt(day));
            personTreeSet.add(person);
        }

        Person old = personTreeSet.first();
        Person young = personTreeSet.last();

        bufferedWriter.write(young.name + '\n' + old.name);
        bufferedWriter.flush();

        bufferedReader.close();
        bufferedWriter.close();
    }
}