[20251030] BOJ / G3 / 말이 되고픈 원숭이 / 김수연

[20251030] BOJ / G3 / 말이 되고픈 원숭이 / 김수연

Author: suyeun84

suyeun84/202510/30 BOJ G3 말이 되고픈 원숭이.md

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+```java
+import java.io.*;
+import java.util.*;
+
+public class boj1600 {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static StringTokenizer st;
+    static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+    static int nextInt() {return Integer.parseInt(st.nextToken());}
+
+    static int[][] dir = new int[][] {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
+    static int[][] hdir = new int[][] {{-2, -1}, {-1, -2}, {1, -2}, {2, -1}, {-2, 1}, {-1, 2}, {1, 2}, {2, 1}};
+    static int K, W, H;
+    static int[][] board;
+    static boolean[][][] visited;
+    public static void main(String[] args) throws Exception {
+        nextLine();
+        K = nextInt();
+        nextLine();
+        W = nextInt();
+        H = nextInt();
+        board = new int[H][W];
+        visited = new boolean[H][W][K+1];
+        for (int i = 0; i < H; i++) {
+            nextLine();
+            for (int j = 0; j < W; j++) {
+                board[i][j] = nextInt();
+            }
+        }
+        bfs();
+    }
+
+    static void bfs() {
+        Queue<Move> q = new LinkedList<>();
+        q.add(new Move(0, 0, 0, 0));
+        visited[0][0][0] = true;
+        
+        while (!q.isEmpty()) {
+            Move cur = q.poll();
+            if (cur.y == H-1 && cur.x == W-1) {
+                System.out.println(cur.dep);
+                return;
+            }
+            
+            for (int[] d : dir) {
+                int ny = cur.y + d[0];
+                int nx = cur.x + d[1];
+                if (ny >= H || ny < 0 || nx >= W || nx < 0 || board[ny][nx] == 1) continue;
+                
+                if (!visited[ny][nx][cur.horse]) {
+                	visited[ny][nx][cur.horse] = true;
+                	q.offer(new Move(ny, nx, cur.horse, cur.dep + 1));
+                }
+            }
+            if (cur.horse < K) {
+            	for (int[] d : hdir) {
+            		int ny = cur.y + d[0];
+                    int nx = cur.x + d[1];
+                    if (ny >= H || ny < 0 || nx >= W || nx < 0 || board[ny][nx] == 1) continue;
+                    if (!visited[ny][nx][cur.horse+1]) {
+                    	visited[ny][nx][cur.horse+1] = true;
+                    	q.offer(new Move(ny, nx, cur.horse+1, cur.dep + 1));
+                    }
+            	}
+            }
+        }
+        System.out.println(-1);
+    }
+
+    static class Move {
+        int y, x, horse, dep;
+        public Move(int y, int x, int horse, int dep) {
+            this.y = y;
+            this.x = x;
+            this.horse = horse;
+            this.dep = dep;
+        }
+    }
+}
+```