[20251116] BOJ / G5 / 아우으 우아으이야!! / 한종욱

Ukj0ng/202511/16 BOJ G5 아우으 우아으이야!!.md

@@ -0,0 +1,59 @@
+```
+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<>();
+        while (N-->0) {
+            StringTokenizer st = new StringTokenizer(br.readLine());
+            int x = Integer.parseInt(st.nextToken());
+            int y = Integer.parseInt(st.nextToken());
+
+            events.add(new int[]{x, y});
+        }
+
+        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 length = 0;
+        int start = -2000000000;
+        int end = -2000000000;
+
+        for (int[] event : events) {
+            if (end < event[0]) {
+                length += end-start;
+                start = event[0];
+                end = event[1];
+            } else {
+                end = Math.max(end, event[1]);
+            }
+        }
+
+        length += end-start;
+
+        return length;
+    }
+}
+```