[20260311] BOJ / G5 / 공주님을 구해라! / 이준희

Author: JHLEE325

JHLEE325/202603/19 BOJ G5 공주님을 구해라!.md

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+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    static int N, M, T;
+    static int[][] map;
+    static boolean[][] visited;
+    static int[] dx = {-1, 1, 0, 0};
+    static int[] dy = {0, 0, -1, 1};
+
+    public static void main(String[] args) throws Exception {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        T = Integer.parseInt(st.nextToken());
+
+        map = new int[N][M];
+        visited = new boolean[N][M];
+
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < M; j++) {
+                map[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+
+        int result = bfs();
+
+        if (result == -1) System.out.println("Fail");
+        else System.out.println(result);
+    }
+
+    static int bfs() {
+        Queue<int[]> q = new LinkedList<>();
+        q.add(new int[]{0, 0, 0});
+        visited[0][0] = true;
+
+        int findGram = Integer.MAX_VALUE;
+        int res = Integer.MAX_VALUE;
+
+        while (!q.isEmpty()) {
+            int[] cur = q.poll();
+            int x = cur[0];
+            int y = cur[1];
+            int time = cur[2];
+
+            if (time > T) break;
+
+            if (x == N - 1 && y == M - 1) {
+                res = time;
+                break;
+            }
+
+            for (int i = 0; i < 4; i++) {
+                int nx = x + dx[i];
+                int ny = y + dy[i];
+
+                if (nx >= 0 && nx < N && ny >= 0 && ny < M && !visited[nx][ny]) {
+                    if (map[nx][ny] == 2) {
+                        visited[nx][ny] = true;
+                        findGram = time + 1 + Math.abs(N - 1 - nx) + Math.abs(M - 1 - ny);
+                    }
+                    else if (map[nx][ny] == 0) {
+                        visited[nx][ny] = true;
+                        q.add(new int[]{nx, ny, time + 1});
+                    }
+                }
+            }
+        }
+
+        int finalMin = Math.min(findGram, res);
+        return (finalMin <= T) ? finalMin : -1;
+    }
+}
+```