[백준] 1107번 리모컨 #Java

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

public class Main {

    static int N;
    static boolean check [];
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        N = Integer.parseInt(br.readLine());
        int n = Integer.parseInt(br.readLine());
        if(n==0){
            // 이거때매 틀림
            int result = Math.abs(N - 100);
            result = Math.min(result,(String.valueOf(N).length()));
            System.out.println(result);
        }else{
            StringTokenizer st = new StringTokenizer(br.readLine()," ");
            check = new boolean[10];
            for (int i = 0; i < n; i++) {
                check[Integer.parseInt(st.nextToken())] = true;
            }
            System.out.println(solution());
        }
    }

    private static int solution() {
        // 완탐..
        int result = Math.abs(N - 100); // ++나 --로만 갈 수 있는 최대값.
        for (int i = 0; i <= 999999; i++) {
            String s = String.valueOf(i);
            if(isBroken(s)){
                result = Math.min(result,(s.length() + Math.abs(N-i)));
            }
        }
        return result;
    }

    private static boolean isBroken(String s) {
        for (int j = 0; j < s.length(); j++) {
            if(check[s.charAt(j)-'0']){
                return false;
            }
        }
        return true;
    }
}