[20251229] BOJ / G3 / 고기잡이 / 한종욱

Ukj0ng/202512/29 BOJ G3 고기잡이.md

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+```
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static final int[] dx = {1, 1, -1, -1};
+    private static final int[] dy = {1, -1, 1, -1};
+    private static List<int[]> nets, fishes;
+    private static boolean[][] map;
+    private static int N, I, M, answer;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        for (int[] pos : fishes){
+            for (int[] net : nets) {
+                for (int i = pos[0]-net[0]; i <= pos[0]+net[0]; i++) {
+                    int count = 0;
+                    for (int[] fish : fishes) {
+                        if (i <= fish[0] && fish[0] <= i+net[0] && pos[1] <= fish[1] && fish[1] <= pos[1]+net[1]) count++;
+                    }
+                    answer = Math.max(answer, count);
+                }
+
+                for (int i = pos[1]-net[1]; i <= pos[1]+net[1]; i++) {
+                    int count = 0;
+                    for (int[] fish : fishes) {
+                        if (i <= fish[1] && fish[1] <= i+net[1] && pos[0] <= fish[0] && fish[0] <= pos[0]+net[0]) count++;
+                    }
+                    answer = Math.max(answer, count);
+                }
+            }
+        }
+
+        bw.write(answer + "\n");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        I = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+
+        map = new boolean[N+1][N+1];
+        fishes = new ArrayList<>();
+
+        for (int i = 0; i < M; i++) {
+            st = new StringTokenizer(br.readLine());
+            int x = Integer.parseInt(st.nextToken());
+            int y = Integer.parseInt(st.nextToken());
+
+            map[x][y] = true;
+            fishes.add(new int[]{x, y});
+        }
+
+        nets = makeNet();
+    }
+
+    private static List<int[]> makeNet() {
+        List<int[]> nets = new ArrayList<>();
+
+        int r = 1;
+        int c = I/2-1;
+
+        while (c > 0) {
+            nets.add(new int[]{r, c});
+            r++;
+            c--;
+        }
+
+        return nets;
+    }
+
+    private static boolean OOB(int x, int y) {
+        return x < 1 || x > N || y < 1 || y > N;
+    }
+}
+```