diff --git "a/Ukj0ng/202511/09 BOJ P5 \354\247\221\353\260\260\354\233\220 \355\225\234\354\203\201\353\215\225.md" "b/Ukj0ng/202511/09 BOJ P5 \354\247\221\353\260\260\354\233\220 \355\225\234\354\203\201\353\215\225.md" new file mode 100644 index 00000000..af5ab11f --- /dev/null +++ "b/Ukj0ng/202511/09 BOJ P5 \354\247\221\353\260\260\354\233\220 \355\225\234\354\203\201\353\215\225.md" @@ -0,0 +1,106 @@ +``` +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 final int[] dx = {-1, -1, -1, 0, 0, 1, 1, 1}; + private static final int[] dy = {-1, 0, 1, -1, 1, -1, 0, 1}; + private static List list; + private static char[][] map; + private static boolean[][] visited; + private static int[][] height; + private static int[] start; + private static int N, K; + public static void main(String[] args) throws IOException { + init(); + int answer = twoPointer(); + + bw.write(answer + "\n"); + bw.flush(); + bw.close(); + br.close(); + } + + private static void init() throws IOException { + N = Integer.parseInt(br.readLine()); + + map = new char[N][N]; + height = new int[N][N]; + visited = new boolean[N][N]; + start = new int[2]; + + for (int i = 0; i < N; i++) { + map[i] = br.readLine().toCharArray(); + for (int j = 0; j < N; j++) { + if (map[i][j] == 'P') { + start[0] = i; + start[1] = j; + } + if (map[i][j] == 'K') K++; + } + } + + Set set = new TreeSet<>(); + for (int i = 0; i < N; i++) { + StringTokenizer st = new StringTokenizer(br.readLine()); + for (int j = 0; j < N; j++) { + height[i][j] = Integer.parseInt(st.nextToken()); + set.add(height[i][j]); + } + } + + list = new ArrayList<>(set); + } + + private static int twoPointer() { + int result = Integer.MAX_VALUE; + int left = 0; + + for (int right = 0; right < list.size(); right++) { + while (left <= right) { + if (valid(list.get(left), list.get(right))) { + result = Math.min(result, list.get(right) - list.get(left)); + left++; + } else break; + } + } + + return result; + } + + private static boolean valid(int min, int max) { + if (height[start[0]][start[1]] < min || height[start[0]][start[1]] > max) return false; + + Queue q = new ArrayDeque<>(); + for (int i = 0; i < N; i++) Arrays.fill(visited[i], false); + visited[start[0]][start[1]] = true; + q.add(new int[]{start[0], start[1]}); + + int temp = 0; + + while (!q.isEmpty()) { + int[] current = q.poll(); + + if (map[current[0]][current[1]] == 'K') temp++; + + for (int i = 0; i < 8; i++) { + int nx = current[0] + dx[i]; + int ny = current[1] + dy[i]; + + if (OOB(nx, ny) || visited[nx][ny] || height[nx][ny] < min || height[nx][ny] > max) continue; + + visited[nx][ny] = true; + q.add(new int[]{nx, ny}); + } + } + + return temp == K; + } + + private static boolean OOB(int nx, int ny) { + return nx < 0 || nx > N-1 || ny < 0 || ny > N-1; + } +} +```