BOJ_16948 : 데스 나이트

Author: spring0913

week3/BOJ_16948(데스 나이트).java

@@ -0,0 +1,42 @@
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N = Integer.parseInt(br.readLine());
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int r1 = Integer.parseInt(st.nextToken());
+        int c1 = Integer.parseInt(st.nextToken());
+        int r2 = Integer.parseInt(st.nextToken());
+        int c2 = Integer.parseInt(st.nextToken());
+
+        int[][] visited = new int[N+1][N+1];
+        int[] dh = {-2, -2, 0, 0, 2, 2};
+        int[] dw = {-1, 1, -2, 2, -1, 1};
+        Queue<int[]> q = new LinkedList<>();
+        q.offer(new int[]{r1, c1});
+        while(!q.isEmpty()) {
+            int h = q.peek()[0];
+            int w = q.peek()[1];
+            q.poll();
+            if(h == r2 && w == c2) {
+                System.out.println(visited[h][w]);
+                return;
+            }
+
+            for(int i=0; i<6; i++) {
+                int nextH = h + dh[i];
+                int nextW = w + dw[i];
+                if(nextH >= 0 && nextH < N && nextW >= 0 && nextW < N) {
+                    if(visited[nextH][nextW] == 0) {
+                        visited[nextH][nextW] = visited[h][w] + 1;
+                        q.offer(new int[]{nextH, nextW});
+                    }
+                }
+            }
+        }
+        System.out.println("-1");
+    }
+}