백준 5597번 자바 - 과제 안 내신 분..?

 

import java.util.Scanner;

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

        for (int i = 1; i < 29; i++) {
            int submit = scanner.nextInt();
            student[submit] = 1;
        }
        for (int i=1; i<student.length; i++) {
            if(student[i]!=1) {
                System.out.println(i);
            }
        }
    }
}