Merge pull request #1573 from AlgorithmWithGod/zinnnn37

[20251203] BOJ / G3 / 욕심쟁이 판다 / 김민진

Author: ShinHeeEul

zinnnn37/202512/3 BOJ G3 욕심쟁이 판다.md

@@ -0,0 +1,69 @@
+```java
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class BJ_1937_욕심쟁이_판다 {
+
+    private static final int[] dx = { 0, 1, 0, -1 };
+    private static final int[] dy = { 1, 0, -1, 0 };
+
+    private static final BufferedReader  br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static       StringTokenizer st;
+
+    private static int N, ans;
+    private static int[][] bamboo, dp;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        ans = 0;
+
+        bamboo = new int[N][N];
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < N; j++) {
+                bamboo[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+        dp = new int[N][N];
+    }
+
+    private static void sol() throws IOException {
+        for (int i = 0; i < N; i++) {
+            for (int j = 0; j < N; j++) {
+                ans = Math.max(ans, dfs(i, j));
+            }
+        }
+        bw.write(ans + "");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static int dfs(int x, int y) {
+        if (dp[x][y] != 0) return dp[x][y];
+
+        dp[x][y] = 1;
+
+        for (int d = 0; d < 4; d++) {
+            int nx = x + dx[d];
+            int ny = y + dy[d];
+
+            if (OOB(nx, ny) || bamboo[x][y] >= bamboo[nx][ny]) continue;
+
+            dp[x][y] = Math.max(dp[x][y], dfs(nx, ny) + 1);
+        }
+        return dp[x][y];
+    }
+
+    private static boolean OOB(int x, int y) {
+        return x < 0 || x >= N || y < 0 || y >= N;
+    }
+
+}
+```