[20251208] BOJ / G3 / 욕심쟁이 판다 / 이강현

lkhyun/202512/08 BOJ G3 욕심쟁이 판다.md

@@ -0,0 +1,63 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringTokenizer st;
+
+    static int N;
+    static int[][] forest;
+    static int[][] dp;
+
+    // 상하좌우
+    static int[] di = {-1, 1, 0, 0};
+    static int[] dj = {0, 0, -1, 1};
+
+    static int ans = 0;
+
+    public static void main(String[] args) throws Exception {
+        st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+
+        forest = new int[N][N];
+        dp = new int[N][N];
+
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < N; j++) {
+                forest[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+
+        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.close();
+    }
+
+    public static int DFS(int i, int j) {
+        if (dp[i][j] != 0) {
+            return dp[i][j];
+        }
+
+        dp[i][j] = 1;
+
+        for (int k = 0; k < 4; k++) {
+            int ni = i + di[k];
+            int nj = j + dj[k];
+
+            if (ni >= 0 && ni < N && nj >= 0 && nj < N && forest[ni][nj] > forest[i][j]) {
+                dp[i][j] = Math.max(dp[i][j], DFS(ni, nj) + 1);
+            }
+        }
+
+        return dp[i][j];
+    }
+}
+```