Merge pull request #643 from AlgorithmWithGod/lkhyun

[20250810] BOJ / G4 / 세수의 합 / 이강현

Author: ShinHeeEul

lkhyun/202508/10 BOJ G4 세수의 합.md

@@ -0,0 +1,38 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main {
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static int N;
+    static int[] arr;
+
+    public static void main(String[] args) throws Exception {
+        N = Integer.parseInt(br.readLine());
+        arr = new int[N];
+
+        for (int i = 0; i < N; i++) {
+            arr[i] = Integer.parseInt(br.readLine());
+        }
+        Arrays.sort(arr);
+        
+        Set<Integer> sums = new HashSet<>();
+        for (int i = 0; i < N; i++) {
+            for (int j = 0; j < N; j++) {
+                sums.add(arr[i] + arr[j]);
+            }
+        }
+
+        a: for (int i = N-1; i >= 0; i--) {
+            for (int j = 0; j <= i; j++) {
+                if(sums.contains(arr[i] - arr[j])){
+                    bw.write(arr[i] + "");
+                    break a;
+                }
+            }
+        }
+        bw.close();
+    }
+}
+```