From c887012c224f94f6b026f7f48383ceab7aabb917 Mon Sep 17 00:00:00 2001
From: JHLEE325 <82587652+JHLEE325@users.noreply.github.com>
Date: Sat, 15 Nov 2025 20:55:34 +0900
Subject: [PATCH] =?UTF-8?q?[20251115]=20BOJ=20/=20G4=20/=20=EC=A2=8B?=
 =?UTF-8?q?=EB=8B=A4=20/=20=EC=9D=B4=EC=A4=80=ED=9D=AC?=
MIME-Version: 1.0
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---
 .../15 BOJ G4 \354\242\213\353\213\244.md"    | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 "JHLEE325/202511/15 BOJ G4 \354\242\213\353\213\244.md"

diff --git "a/JHLEE325/202511/15 BOJ G4 \354\242\213\353\213\244.md" "b/JHLEE325/202511/15 BOJ G4 \354\242\213\353\213\244.md"
new file mode 100644
index 00000000..a4da3056
--- /dev/null
+++ "b/JHLEE325/202511/15 BOJ G4 \354\242\213\353\213\244.md"	
@@ -0,0 +1,48 @@
+```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().trim());
+        long[] arr = new long[N];
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < N; i++) {
+            arr[i] = Long.parseLong(st.nextToken());
+        }
+
+        Arrays.sort(arr);
+
+        int goodCount = 0;
+        for (int k = 0; k < N; k++) {
+            long target = arr[k];
+            int left = 0;
+            int right = N - 1;
+
+            while (left < right) {
+                if (left == k) {
+                    left++;
+                    continue;
+                }
+                if (right == k) {
+                    right--;
+                    continue;
+                }
+
+                long sum = arr[left] + arr[right];
+                if (sum == target) {
+                    goodCount++;
+                    break;
+                } else if (sum < target) {
+                    left++;
+                } else {
+                    right--;
+                }
+            }
+        }
+
+        System.out.println(goodCount);
+    }
+}
+```