[20251108] BOJ / G4 / 리모컨 / 이종환

0224LJH/202511/08 BOJ 리모컨.md

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+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.Queue;
+import java.util.StringTokenizer;
+
+public class Main { 
+
+	static int ans,target;
+	static HashSet<Integer> banSet = new HashSet<>();
+
+    public static void main(String[] args) throws IOException {
+    	init();
+    	process();
+    	print();
+    }
+
+    private static void init() throws IOException{
+    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));;
+    	target = Integer.parseInt(br.readLine());
+
+    	int banCnt = Integer.parseInt(br.readLine());
+    	if (banCnt == 0) return;
+    	StringTokenizer st = new StringTokenizer(br.readLine());
+    	for (int i = 0; i < banCnt; i++) {
+    		banSet.add(Integer.parseInt(st.nextToken()));
+    	}
+    }
+
+
+    private static void process() {
+    	ans = Math.abs(target - 100);
+
+    	for (int i = 0 ; i < 1000000; i++) {
+    		int num = i;
+    		int diff = Math.abs(target - num);
+    		int len = String.valueOf(num).length();
+    		boolean isPossible = true;
+    		while(true) {
+    			if (banSet.contains(num%10)) {
+    				isPossible = false;
+    				break;
+    			}
+
+    			num /= 10;
+    			if (num == 0) break;
+    		}
+
+    		if (isPossible) ans = Math.min(ans, diff+len);
+    	}
+    }
+
+
+
+    private static void print() {
+    	System.out.println(ans);
+    }
+}
+
+
+```