[SW Expert Academy] 화섭이의 정수 나열 (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AWHz7xD6A20DFAVB&categoryId=AWHz7xD6A20DFAVB&categoryType=CODE&problemTitle=&orderBy=PASS_RATE&selectCodeLang=ALL&select-1=3&pageSize=10&pageIndex=11

SW Expert Academy

 

import java.util.Scanner;

class Solution {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();

		for (int tc = 1; tc <= t; tc++) {
			StringBuilder sb = new StringBuilder();
			int n = sc.nextInt();

			for (int i = 0; i < n; i++) {
				sb.append(sc.nextInt());
			}

			int idx = 0;

			while (true) {
				if (!sb.toString().contains(Integer.toString(idx))) { //1씩 증가시키며 있는지 확인
					break;
				}
				idx++;
			}

			System.out.println("#" + tc + " " + idx);

		}

	}
}