Merge pull request #719 from AlgorithmWithGod/Ukj0ng

[20250822] BOJ / G3 / 하늘에서 별똥별이 빗발친다 / 한종욱

Author: ShinHeeEul

Ukj0ng/202508/22 BOJ G3 하늘에서 별똥별이 빗발친.md

@@ -0,0 +1,60 @@
+```
+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 int[][] stars;
+    private static int N, M, L, K, answer;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        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());
+        M = Integer.parseInt(st.nextToken());
+        L = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+        answer = K;
+        int max = 0;
+
+        stars = new int[K][2];
+
+        Set<Integer> xCandidates = new HashSet<>();
+        Set<Integer> yCandidates = new HashSet<>();
+
+        for (int i = 0; i < K; i++) {
+            st = new StringTokenizer(br.readLine());
+            stars[i][0] = Integer.parseInt(st.nextToken());
+            stars[i][1] = Integer.parseInt(st.nextToken());
+            xCandidates.add(stars[i][0]);
+            yCandidates.add(stars[i][1]);
+        }
+
+        for (int x : xCandidates) {
+            for (int y : yCandidates) {
+                int count = 0;
+
+                for (int i = 0; i < K; i++) {
+                    if (stars[i][0] >= x && stars[i][0] <= x + L &&
+                            stars[i][1] >= y && stars[i][1] <= y + L) {
+                        count++;
+                    }
+                }
+
+                max = Math.max(max, count);
+            }
+        }
+
+        answer -= max;
+    }
+}
+```