백준5597: 과제 안 내신 분..?

문제

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

문제 풀이

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] student = new int[31];

        for (int i = 1; i < 29; i++) {
            student[sc.nextInt()] = 1;
        }

        for (int i = 1; i < student.length; i++) {
            if (student[i] != 1) {
                System.out.print(i+" ");
            }
        }
    }
}