백준[Java] 5597번 과제 안 내신 분..?

https://www.acmicpc.net/problem/5597

5597번: 과제 안 내신 분..?

문제풀이 1

import java.util.Scanner;
public class _5597_1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int[] arr = new int[31];

        for (int i = 1; i <= 28; i++) {
            int check = sc.nextInt();
            arr[check] = 1;

        }

        for (int i = 1; i <= 30; i++) {
            if (arr[i] != 1)
                System.out.println(i);
        }
    }
}

---

문제풀이 2

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class _5597_2 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int[] arr = new int[31];

        for (int i = 1; i <= 28; i++) {
            int check = Integer.parseInt(br.readLine());
            arr[check] = 1;

        }

        for (int i = 1; i <= 30; i++) {
            if (arr[i] != 1)
                System.out.println(i);
        }
    }
}