[20251114] BOJ / G5 / 최소 회의실 개수 / 한종욱

Ukj0ng/202511/14 BOJ G5 최소 회의실 개수.md

@@ -0,0 +1,51 @@
+```
+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 List<int[]> events;
+    private static int N;
+    public static void main(String[] args) throws IOException {
+        init();
+
+        int answer = sweeping();
+
+        bw.write(answer + "\n");
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        events = new ArrayList<>();
+
+        for (int i = 0; i < N; i++) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            events.add(new int[]{Integer.parseInt(st.nextToken()), 0});
+            events.add(new int[]{Integer.parseInt(st.nextToken()), 1});
+        }
+
+        events.sort((o1, o2) -> {
+            if (o1[0] == o2[0]) return Integer.compare(o2[1], o1[1]);
+            return Integer.compare(o1[0], o2[0]);
+        });
+    }
+
+    private static int sweeping() {
+        int result = 0;
+        int count = 0;
+
+        for (int[] event : events) {
+            if (event[1] == 0) count++;
+            else count--;
+
+            result = Math.max(result, count);
+        }
+
+        return result;
+    }
+}
+```