[백준 Java] 1차원 배열 - 5597번: 과제 안 내신 분..?

 

 

import java.io.*;
import java.util.StringTokenizer;

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

        int[] arr = new int[30];

        for(int i=0; i<28; i++) {
            int pass = Integer.parseInt(br.readLine());
            arr[pass-1] = 1;
        }
        for(int i=0; i<30; i++) {
            if(arr[i] != 1) {
                bw.write(i + 1 + "\n");
            }
        }

        br.close();
        bw.flush();
        bw.close();
    }
}