Merge pull request #1428 from AlgorithmWithGod/Seol-JY

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

Author: ShinHeeEul

Seol-JY/202511/16 BOJ G5 아우으 우아으이야!!.md

@@ -0,0 +1,41 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        
+        int n = Integer.parseInt(br.readLine());
+        
+        if (n == 0) {
+            System.out.println(0);
+            return;
+        }
+        
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        int currentStart = Integer.parseInt(st.nextToken());
+        int currentEnd = Integer.parseInt(st.nextToken());
+        
+        int totalLength = 0;
+        
+        for (int i = 1; i < n; i++) {
+            st = new StringTokenizer(br.readLine());
+            int x = Integer.parseInt(st.nextToken());
+            int y = Integer.parseInt(st.nextToken());
+            
+            if (x <= currentEnd) {
+                currentEnd = Math.max(currentEnd, y);
+            } else {
+                totalLength += (currentEnd - currentStart);
+                currentStart = x;
+                currentEnd = y;
+            }
+        }
+        
+        totalLength += (currentEnd - currentStart);
+        
+        System.out.println(totalLength);
+    }
+}
+```