[JAVA]백준_5597_과제 안 내신 분..?

문제링크

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

5597번: 과제 안 내신 분..?

 

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

public class Main_5597 {

	public static void main(String[] args) throws NumberFormatException, IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int arr[] = new int[30];
		
		for(int i=0;i<28;i++) {
			arr[Integer.parseInt(br.readLine())-1] = 1;
		}
		
		for(int i=0;i<30;i++) {
			if(arr[i]==0)
				System.out.println(i+1);
		}
	}

}