[백준] 5597 과제 안 내신 분..? - Java

문제

링크

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코드

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

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

        int[] arr = new int[30];
        for (int i = 0; i < arr.length - 2; i++) {
            int student = Integer.parseInt(br.readLine());
            arr[(student - 1)] = 1;
        }

        for (int i = 0; i < arr.length; i++) {
            if (arr[i] != 1) {
                System.out.println(i + 1);
            }
        }
    }
}

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리뷰