[20250823] BOJ / G4 / 리모컨 / 한종욱

Author: Ukj0ng

Ukj0ng/202508/23 BOJ G4 리모컨.md

@@ -0,0 +1,69 @@
+```
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static boolean[] used;
+    private static int N, M, answer;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        for (int i = 0; i <= 1000000; i++) {
+            if (canPush(i)) {
+                int n = Math.abs(N - i) + length(i);
+                answer = Math.min(answer, n);
+            }
+        }
+
+        bw.write(answer + "\n");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        M = Integer.parseInt(br.readLine());
+        answer = Math.abs(N - 100);
+
+        used = new boolean[10];
+        Arrays.fill(used, true);
+
+        if (M > 0) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+
+            for (int i = 0; i < M; i++) {
+                int n = Integer.parseInt(st.nextToken());
+                used[n] = false;
+            }
+        }
+    }
+
+    private static boolean canPush(int num) {
+        if (num == 0) return used[num];
+
+        while (num > 0) {
+            int n = num % 10;
+            if (!used[n]) return false;
+            num /= 10;
+        }
+
+        return true;
+    }
+
+    private static int length(int num) {
+        if (num == 0) return 1;
+
+        int count = 0;
+        while (num > 0) {
+            count++;
+            num /= 10;
+        }
+
+        return count;
+    }
+}
+```